# STL 3D Model exported into OBJ file

**URL:** <https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293>\
**Category:** Coding Questions\
**Created:** [December 25, 2022, 3:24am UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293 "2022-12-25T03:24:34Z")\
**Posts on this page:** 18\
**Page:** 2

<div class="post-metadata">

**Author:** ![svan](https://avatars.discourse-cdn.com/v4/letter/s/82dd89/32.png) [@svan](https://discourse.processing.org/u/svan)\
**Post date:** [December 26, 2022, 4:04pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/21 "2022-12-26T16:04:40Z")

</div>

Finally got it to work. Have to use P3D renderer. The following gives a yellow rotating mobius (needs more work):

```auto
PShape mobius;

float ry;
void setup() {
  size(400, 400, P3D);
  background(209);
  mobius = loadShape("mobius.obj");
  mobius.setFill(color(255, 255, 0));
  ry = 0.85;
}

void draw() {
  background(209);
  translate(width/2, height/2, 100);
  rotateZ(PI);
  rotateY(ry);
  scale(4.0);
  shape(mobius);
   ry += 0.02;
}

```

Blender is an impressive app. The good news is that it will convert from .stl to .obj without having to use an online converter. It also includes an accompanying .mtl file automatically.

---

<div class="post-metadata">

**Author:** ![asymmetric](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/asymmetric/32/16577_2.png) [@asymmetric](https://discourse.processing.org/u/asymmetric)\
**Post date:** [December 27, 2022, 6:37pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/23 "2022-12-27T18:37:31Z")

</div>

@glv @svan now it’s working!!

 ![Screen Shot 2022-12-27 at 10.36.52 AM](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/1/0/107e25e64399eb7683a3011fffbc41e1581a3705.jpeg)

---

<div class="post-metadata">

**Author:** ![asymmetric](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/asymmetric/32/16577_2.png) [@asymmetric](https://discourse.processing.org/u/asymmetric)\
**Post date:** [December 27, 2022, 6:39pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/24 "2022-12-27T18:39:43Z")

</div>

How did you get the setTexture to work in processing.js? @glv

My 3d model is now loading and visible with setFill, but the setTexture is not working.

“txt cannot be resolved to a variable”

```auto
mobius.setTexture(txt);

```

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [December 27, 2022, 6:46pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/25 "2022-12-27T18:46:50Z")

</div>

> [@asymmetric](#):
>
> How did you get the setTexture to work in processing.js? @glv

> [@glv](#):
>
> If this is a Processing.js issue I can’t help with that.

Works fine with Processing 4.1.1:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/9/2/926c761046b8fa62670289271f8bc4e20a36eb08.png)

Be careful with names… I used _txt_ and you had _txtr_ in your examples.  
It may be as simple as that… scrutinize your code.

_moebius.obj_ data to copy to _moebius.obj_ file :

> **Click to Open!**
>
> ```auto
> # Blender 3.3.2
> # www.blender.org
> o moebius
> v 0.121339 -10.000000 -4.125570
> v 0.121337 -10.000000 -24.125566
> v 7.972092 -9.224739 -23.661596
> v 2.093474 -10.719337 -4.603580
> v 15.496721 -8.397884 -20.761618
> v 4.356159 -11.378731 -4.421417
> v 21.926605 -7.524071 -15.599192
> v 6.682018 -11.974487 -3.442043
> v 26.575626 -6.608175 -8.592623
> v 8.785276 -12.503277 -1.610420
> v 28.918232 -5.655327 -0.368103
> v 10.352818 -12.962145 1.023182
> v 28.651646 -4.670853 8.301783
> v 11.084055 -13.348526 4.292091
> v 25.734690 -3.660254 16.577797
> v 10.734687 -13.660255 7.917543
> v 20.398024 -2.629189 23.642994
> v 9.158323 -13.895586 11.529477
> v 13.124269 -1.583416 28.790798
> v 6.339796 -14.053210 14.702682
> v 4.599720 -0.528791 31.502056
> v 2.414607 -14.132242 17.004772
> v -4.357051 0.528792 31.502052
> v -2.329559 -14.132242 18.050541
> v -12.881602 1.583417 28.790791
> v -7.471152 -14.053210 17.555897
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> vt 0.466088 0.480421
> vt 0.480421 0.436447
> vt 0.466088 0.436447
> vt 0.456547 0.490082
> vt 0.490082 0.418900
> vt 0.456547 0.418900
> vt 0.448864 0.503832
> vt 0.448864 0.401807
> vt 0.503832 0.401807
> vt 0.444849 0.521645
> vt 0.521645 0.385262
> vt 0.446501 0.542664
> vt 0.446501 0.369360
> vt 0.542664 0.369360
> vt 0.455626 0.565084
> vt 0.455626 0.354188
> vt 0.565084 0.354188
> vt 0.586212 0.339831
> vt 0.473407 0.339831
> vt 0.473407 0.586212
> vt 0.628663 0.686120
> vt 0.628663 0.917117
> vt 0.737807 0.848799
> vt 0.737807 0.697569
> vt 0.848799 0.697569
> vt 0.818190 0.753748
> vt 0.818190 0.707913
> vt 0.753748 0.707913
> vt 0.864044 0.642877
> vt 0.642877 0.717094
> vt 0.873487 0.725062
> vt 0.873487 0.527989
> vt 0.527989 0.725062
> vt 0.848479 0.731770
> vt 0.848479 0.420462
> vt 0.420462 0.731770
> vt 0.794356 0.330053
> vt 0.330053 0.737183
> vt 0.794356 0.737183
> vt 0.719010 0.263964
> vt 0.263964 0.741269
> vt 0.719010 0.741269
> vt 0.226256 0.744006
> vt 0.631828 0.226256
> vt 0.631828 0.744006
> vt 0.542555 0.217667
> vt 0.217667 0.745378
> vt 0.542555 0.745378
> vt 0.235825 0.745378
> vt 0.460182 0.745378
> vt 0.460182 0.235825
> vt 0.392029 0.744006
> vt 0.275796 0.744006
> vt 0.392029 0.275796
> vt 0.343091 0.741269
> vt 0.330892 0.741269
> vt 0.343091 0.330892
> vt 0.315721 0.737183
> vt 0.393606 0.737183
> vt 0.315721 0.393606
> vt 0.309655 0.731770
> vt 0.456555 0.731770
> vt 0.309655 0.456555
> vt 0.513313 0.725062
> vt 0.322351 0.513313
> vt 0.559040 0.717094
> vt 0.349568 0.717094
> vt 0.349568 0.559040
> vt 0.590842 0.707913
> vt 0.386087 0.707913
> vt 0.386087 0.590842
> vt 0.607847 0.697569
> vt 0.426471 0.697569
> vt 0.426471 0.607847
> vt 0.465758 0.611010
> vt 0.465758 0.686120
> vt 0.500000 0.673630
> vt 0.500000 0.949970
> vt 0.500000 0.673630
> vt 0.500000 0.602711
> s 0
> f 1/1/1 2/3/1 3/5/1
> f 3/5/2 4/7/2 1/1/2
> f 4/7/3 3/5/3 5/9/3
> f 5/9/4 6/12/4 4/7/4
> f 6/12/5 5/9/5 7/15/5
> f 7/15/6 8/18/6 6/12/6
> f 8/18/7 7/15/7 9/21/7
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> f 10/23/9 9/21/9 11/26/9
> f 11/26/10 12/28/10 10/23/10
> f 12/28/11 11/26/11 13/30/11
> f 13/30/12 14/32/12 12/28/12
> f 14/32/13 13/30/13 15/35/13
> f 15/35/14 16/38/14 14/32/14
> f 16/38/15 15/35/15 17/43/15
> f 17/43/16 18/44/16 16/38/16
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> f 23/57/22 24/59/22 22/56/22
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> f 26/66/25 25/63/25 27/69/25
> f 27/67/26 28/70/26 26/64/26
> f 28/71/27 27/68/27 29/74/27
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> f 30/77/29 29/74/29 31/79/29
> f 31/79/30 32/81/30 30/77/30
> f 32/81/31 31/79/31 33/84/31
> f 33/84/32 34/86/32 32/81/32
> f 34/86/33 33/84/33 35/89/33
> f 35/89/34 36/91/34 34/86/34
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> f 38/96/37 37/94/37 39/100/37
> f 39/99/38 40/102/38 38/97/38
> f 40/103/39 39/100/39 41/106/39
> f 41/106/40 42/108/40 40/103/40
> f 43/110/41 4/8/41 6/14/41
> f 6/13/42 44/113/42 43/109/42
> f 44/112/43 6/14/43 8/20/43
> f 8/19/44 45/116/44 44/113/44
> f 45/115/45 8/20/45 10/24/45
> f 10/25/46 46/118/46 45/116/46
> f 46/118/47 10/25/47 12/29/47
> f 12/29/48 47/120/48 46/118/48
> f 47/120/49 12/29/49 14/34/49
> f 14/33/50 48/125/50 47/122/50
> f 48/123/51 14/34/51 16/40/51
> f 16/39/52 49/126/52 48/125/52
> f 49/128/53 16/40/53 18/46/53
> f 18/45/54 50/129/54 49/126/54
> f 50/131/55 18/46/55 20/50/55
> f 20/51/56 51/132/56 50/129/56
> f 51/132/57 20/51/57 22/56/57
> f 22/55/58 52/137/58 51/134/58
> f 52/135/59 22/56/59 24/59/59
> f 24/60/60 53/140/60 52/137/60
> f 53/138/61 24/61/61 26/66/61
> f 26/65/62 54/142/62 53/140/62
> f 54/141/63 26/66/63 28/72/63
> f 28/71/64 55/145/64 54/142/64
> f 55/144/65 28/72/65 30/78/65
> f 30/77/66 56/148/66 55/145/66
> f 56/147/67 30/78/67 32/83/67
> f 32/82/68 57/152/68 56/149/68
> f 57/150/69 32/83/69 34/88/69
> f 34/87/70 58/154/70 57/152/70
> f 58/153/71 34/88/71 36/92/71
> f 36/92/72 59/156/72 58/153/72
> f 59/156/73 36/92/73 38/98/73
> f 38/98/74 60/158/74 59/156/74
> f 60/158/75 38/98/75 40/104/75
> f 40/104/76 61/161/76 60/158/76
> f 61/161/77 40/104/77 42/107/77
> f 42/107/78 62/166/78 61/161/78
> f 63/168/79 43/111/79 44/114/79
> f 44/114/80 64/169/80 63/168/80
> f 64/169/81 44/114/81 45/117/81
> f 45/117/82 65/172/82 64/169/82
> f 65/172/83 45/117/83 46/119/83
> f 46/119/84 66/175/84 65/172/84
> f 66/175/85 46/119/85 47/121/85
> f 47/121/86 67/178/86 66/175/86
> f 67/177/87 47/122/87 48/125/87
> f 48/124/88 68/181/88 67/178/88
> f 68/180/89 48/125/89 49/126/89
> f 49/127/90 69/183/90 68/181/90
> f 69/184/91 49/128/91 50/131/91
> f 50/130/92 70/186/92 69/183/92
> f 70/187/93 50/131/93 51/134/93
> f 51/133/94 71/190/94 70/186/94
> f 71/189/95 51/134/95 52/137/95
> f 52/136/96 72/192/96 71/190/96
> f 72/193/97 52/137/97 53/140/97
> f 53/139/98 73/196/98 72/194/98
> f 73/195/99 53/140/99 54/142/99
> f 54/143/100 74/198/100 73/196/100
> f 74/198/101 54/143/101 55/146/101
> f 55/145/102 75/202/102 74/199/102
> f 75/201/103 55/146/103 56/149/103
> f 56/148/104 76/205/104 75/202/104
> f 76/204/105 56/149/105 57/152/105
> f 57/151/106 77/208/106 76/205/106
> f 77/207/107 57/152/107 58/154/107
> f 58/155/108 78/210/108 77/208/108
> f 78/210/109 58/155/109 59/157/109
> f 59/157/110 79/212/110 78/210/110
> f 79/212/111 59/157/111 60/160/111
> f 60/159/112 80/216/112 79/213/112
> f 80/215/113 60/160/113 61/163/113
> f 61/162/114 81/219/114 80/216/114
> f 81/218/115 61/163/115 62/164/115
> f 62/165/116 82/222/116 81/219/116
> f 2/4/117 83/223/117 63/167/117
> f 63/167/118 3/6/118 2/4/118
> f 3/6/119 63/167/119 64/170/119
> f 64/170/120 5/11/120 3/6/120
> f 5/10/121 64/171/121 65/174/121
> f 65/173/122 7/16/122 5/11/122
> f 7/17/123 65/174/123 66/176/123
> f 66/176/124 9/22/124 7/17/124
> f 9/22/125 66/176/125 67/179/125
> f 67/179/126 11/27/126 9/22/126
> f 11/27/127 67/179/127 68/182/127
> f 68/182/128 13/31/128 11/27/128
> f 13/31/129 68/182/129 69/184/129
> f 69/184/130 15/37/130 13/31/130
> f 15/36/131 69/185/131 70/188/131
> f 70/187/132 17/41/132 15/37/132
> f 17/42/133 70/188/133 71/191/133
> f 71/190/134 19/47/134 17/43/134
> f 19/48/135 71/191/135 72/194/135
> f 72/194/136 21/52/136 19/48/136
> f 21/52/137 72/194/137 73/196/137
> f 73/197/138 23/58/138 21/53/138
> f 23/58/139 73/197/139 74/200/139
> f 74/200/140 25/63/140 23/58/140
> f 25/63/141 74/200/141 75/203/141
> f 75/203/142 27/69/142 25/63/142
> f 27/69/143 75/203/143 76/206/143
> f 76/206/144 29/75/144 27/69/144
> f 29/75/145 76/206/145 77/209/145
> f 77/209/146 31/80/146 29/75/146
> f 31/80/147 77/209/147 78/211/147
> f 78/211/148 33/85/148 31/80/148
> f 33/85/149 78/211/149 79/214/149
> f 79/214/150 35/90/150 33/85/150
> f 35/90/151 79/214/151 80/217/151
> f 80/217/152 37/95/152 35/90/152
> f 37/95/153 80/217/153 81/220/153
> f 81/220/154 39/101/154 37/95/154
> f 39/101/155 81/220/155 82/221/155
> f 82/221/156 41/105/156 39/101/156
> f 41/105/157 82/221/157 84/226/157
> f 84/226/158 83/224/158 41/105/158
> f 82/222/159 62/165/159 1/2/159
> f 1/2/160 84/225/160 82/222/160
> f 2/3/161 1/1/161 62/166/161
> f 62/166/162 42/107/162 2/3/162
> f 83/223/163 2/4/163 42/108/163
> f 42/108/164 41/106/164 83/223/164
> f 84/225/165 1/2/165 4/8/165
> f 4/8/166 43/110/166 84/225/166
> f 83/224/167 84/226/167 43/111/167
> f 43/111/168 63/168/168 83/224/168
> 
> ```

Working code:

```auto
PShape mobius;
PImage txtr;

void setup()
  {  
  size(500, 500, P3D);
  txtr = loadImage("http://learningprocessing.com/code/assets/sunflower.jpg");
  mobius = loadShape("moebius.obj");
  mobius.setFill(color(255)); // Brigthens the texture
  mobius.setTexture(txtr);
  }

void draw() 
  {
  background(255);
  translate(width/2, height/2);
  lights();
  
  rotateY(mouseX*TAU/width);
  rotateX(mouseY*TAU/height);

  scale(6);
  shape(mobius);
  }

```

And voila!

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/b/4/b42b9d23723a86413f849176df05187bab923478.jpeg)

`:)`

---

<div class="post-metadata">

**Author:** ![asymmetric](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/asymmetric/32/16577_2.png) [@asymmetric](https://discourse.processing.org/u/asymmetric)\
**Post date:** [December 27, 2022, 6:53pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/26 "2022-12-27T18:53:31Z")

</div>

@glv

When using the following code, my 3d model turns back to black even when using Processing 4.1.1

```auto
mobius.setTexture(txtr);

```

```auto
PShape mobius;
PImage txtr;
float theta;

void setup(){
  size(1000,1000,P3D);
  txtr = loadImage("grid3.jpg");
  mobius = loadShape("ring2obj.obj");
  mobius.setTexture(txtr);
}

void draw() {
  background(txtr);
  
  pushMatrix();
  translate(width/2, height/2);
  shininess(5.0); 
  lights();
  rotateY(mouseY);
  rotateX(mouseX);
  //rotateZ(theta/2);
  scale(90);
  shape(mobius);
  popMatrix();
  
  theta+=.01;
  
}

```

 ![Screen Shot 2022-12-27 at 10.50.52 AM](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/5/d/5d281a6254a34d4af2fb71a2ef18884d483777ba.jpeg)  
 ![Screen Shot 2022-12-27 at 10.51.22 AM](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/d/b/dbb12c73c41f3a5b6a8345f41ddfce4c3c99454e.jpeg)

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [December 27, 2022, 7:07pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/27 "2022-12-27T19:07:36Z")

</div>

> [@asymmetric](#):
>
> When using the following code, my 3d model turns back to black even when using Processing 4.1.1

I added the data in my _moebius.obj_ file in my previous post.

> [@glv](#):
>
> Select _UV \> Cube Projection_ (you can try other selections later)

Which one did you use? I tried a few until I got acceptable results.

Be careful when exporting with Blender and copying the files to the Processing sketch… I made a few errors in the beginning and very methodical now about this.

`:)`

---

<div class="post-metadata">

**Author:** ![asymmetric](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/asymmetric/32/16577_2.png) [@asymmetric](https://discourse.processing.org/u/asymmetric)\
**Post date:** [December 27, 2022, 7:18pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/28 "2022-12-27T19:18:39Z")

</div>

@glv oh I see! I’m not sure what to select after selecting UV\> Cube Projection?

Are there further options before exporting?

---

<div class="post-metadata">

**Author:** ![asymmetric](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/asymmetric/32/16577_2.png) [@asymmetric](https://discourse.processing.org/u/asymmetric)\
**Post date:** [December 27, 2022, 7:20pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/29 "2022-12-27T19:20:48Z")

</div>

> [@glv](#):
>
> Which one did you use? I tried a few until I got acceptable results.

I’ve been selecting UV\> Cube Projection then exporting and nothing else.

---

<div class="post-metadata">

**Author:** ![asymmetric](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/asymmetric/32/16577_2.png) [@asymmetric](https://discourse.processing.org/u/asymmetric)\
**Post date:** [December 27, 2022, 7:24pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/30 "2022-12-27T19:24:02Z")

</div>

> [@glv](#):
>
> `mobius.setTexture(txtr);`

When I use the same code as you… I get the following results. setTexture still is not working?

 ![Screen Shot 2022-12-27 at 11.23.19 AM](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/e/8/e8a44df8cc475a954c10116a9b807ab24a70cdbf.png)

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [December 27, 2022, 7:40pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/31 "2022-12-27T19:40:32Z")

</div>

So that we are comparing the same thing…

Try it with the _moebius.stl_ here:

> **[Moebius ring by pmaegerman](https://www.thingiverse.com/thing:1649028)**
>
> A moebius ring, after a few trials, this is what worked for me :
> shell 2mm
> infill 20%
> Support ( cura ) overhang angle : 50°
> Printed at 70mm/s .2mm resolution.
> I tried no infill, forget about it, you'll waste plastic ;)
> 1.2mm shell was too thin in...

Use this image:

`txtr = loadImage("http://learningprocessing.com/code/assets/sunflower.jpg");`

I also updated a previous topic to include code and the _moebius.obj_ file that works for me.

Pay attention to the _geometry_ selections when exporting.

There is a learning curve to all of this and I went through it… I did a lot of research to understand all of this and some mistakes along the way.

Have fun!

`:)`

---

<div class="post-metadata">

**Author:** ![asymmetric](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/asymmetric/32/16577_2.png) [@asymmetric](https://discourse.processing.org/u/asymmetric)\
**Post date:** [December 27, 2022, 7:51pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/32 "2022-12-27T19:51:09Z")

</div>

Hi @glv! When I use the same 3d model and code as you, the setTexture is still not applying an image?

After selecting “UV \> Cube Projection” do I need to select anymore options?

When exporting to an .OBJ file I have the same geometry selected as you.

 ![Screen Shot 2022-12-27 at 11.48.58 AM](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/e/3/e3453194aab1d72469c0fc481323237f5aa6d25e.jpeg)

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [December 27, 2022, 10:07pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/35 "2022-12-27T22:07:35Z")

</div>

Hello,

The fact that it is green means something is being textured from the image!

These are the notes I have in my code:

```auto
// Blender import:
//
// Delete cube and other stuff
// import Stl(.stl)
// Edit mode
// Cube projection
// Export Wavefront (.obj) with Geometry:
// UV coordinates
// Normals
//
// Make sure you are exporting it to a know location!
// Easy to mix up the exported files.

```

There are experimental and legacy options… do not use these!

I am not a Blender expert and much of this was research to understand what was going on, persistence, perseverance and trial and error.

All that to get a visible texture on a shape in Processing!

That is just the tip of the iceberg when it comes to mapping textures in Blender or in Processing.

[https://en.wikibooks.org/wiki/Blender\_3D:\_Noob\_to\_Pro/UV\_Map\_Basics](https://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/UV_Map_Basics)

> **[3D Models In Processing](https://behreajj.medium.com/3d-models-in-processing-7d968a7cede5)**
>
> To sharpen our skills with lighting, color and materials in Processing’s 3D renderer, it’s helpful to have a model more complex than a…

`:)`

---

<div class="post-metadata">

**Author:** ![svan](https://avatars.discourse-cdn.com/v4/letter/s/82dd89/32.png) [@svan](https://discourse.processing.org/u/svan)\
**Post date:** [December 27, 2022, 10:44pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/36 "2022-12-27T22:44:22Z")

</div>

> [@glv](#):
>
> All that to get a visible texture on a shape in Processing!

You don’t have to do all that. All you really need is an .obj, .mtl, and graphic file (.jpg or .png) and a little Processing code as shown in _Files/Examples/Basics/Shape/LoadDisplayOBJ_:

```auto
PShape rocket;

float ry;
  
public void setup() {
  size(640, 360, P3D);    
  rocket = loadShape("rocket.obj");
}

public void draw() {
  background(0);
  lights();  
  translate(width/2, height/2 + 100, -200);
  rotateZ(PI);
  rotateY(ry);
  shape(rocket);
  
  ry += 0.02;
}

```

**data folder:**  
 ![data](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/2/a/2a2b9eb9ddc52137917b5b92ca272d0e731ffa88.png)

**output:**

 ![rocket](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/d/b/dbdcaae192bdf0ea9ecca69485fb74c82ed097e5.png)

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [December 27, 2022, 11:21pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/37 "2022-12-27T23:21:22Z")

</div>

> [@svan](#):
>
> You don’t have to do all that. All you really need is an .obj, .mtl, and graphic file (.jpg or .png) and a little Processing code

The original poster was importing an STL to Blender and exporting an OBJ and attempting to _texture it with Processing._

I was assisting with that pursuit.

There is a nice definition of an STL file here:

> **[What Is an STL File? – The STL Format Simply Explained](https://all3dp.com/1/stl-file-format-3d-printing/)**
>
> What is an STL file? What does STL stand for? All that and more as we explain the origins, structure, and uses of the STL file format for 3D printing.

`This format describes only the surface geometry of a three-dimensional object without representing color, texture, or other common model attributes.`

The challenge presented was to start with an STL, export to an OBJ and texture it.

It can be textured in Blender and exported or textured in Processing.

_Only_ an STL file in this:

> **[Moebius ring by pmaegerman](https://www.thingiverse.com/thing:1649028)**
>
> A moebius ring, after a few trials, this is what worked for me :
> shell 2mm
> infill 20%
> Support ( cura ) overhang angle : 50°
> Printed at 70mm/s .2mm resolution.
> I tried no infill, forget about it, you'll waste plastic ;)
> 1.2mm shell was too thin in...

`:)`

---

<div class="post-metadata">

**Author:** ![jafal](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jafal/32/19112_2.png) [@jafal](https://discourse.processing.org/u/jafal)\
**Post date:** [December 27, 2022, 11:32pm UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/38 "2022-12-27T23:32:16Z")

</div>

Hi

> **[GitHub - AussieSeaweed/crimson: A simple 3D object viewer](https://github.com/AussieSeaweed/crimson)**
>
> A simple 3D object viewer. Contribute to AussieSeaweed/crimson development by creating an account on GitHub.

---

<div class="post-metadata">

**Author:** ![svan](https://avatars.discourse-cdn.com/v4/letter/s/82dd89/32.png) [@svan](https://discourse.processing.org/u/svan)\
**Post date:** [December 28, 2022, 12:15am UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/39 "2022-12-28T00:15:33Z")

</div>

My point was you don’t have to do all that with Blender; it’s an impressive app but it’s complicated. STL files can be converted to an .obj file with an online converter. The difficult part is getting the .mtl file. There are online repositories of .obj files and ideally the .mtl file comes with it. Otherwise I have re-purposed an .mtl file of one of Processing’s examples with limited success; not an ideal way to do it. In my opinion the reason the poster has had so much trouble is because the .mtl file was created in Blender and did not take into account the special images that were attempted to be added later. The .mtl file sets the texture normally. eg In the Processing example that I posted here is the .mtl

```auto
newmtl Default
illum 2
Ka 0.698039 0.698039 0.698039
Kd 0.698039 0.698039 0.698039
Ks 0.710000 0.710000 0.710000
Ns 76.109253
map_Kd rocket.png

```

Note that the last line sets the graphic file to be used.

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [December 28, 2022, 3:27am UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/40 "2022-12-28T03:27:33Z")

</div>

Hello @asymmetric,

Thanks for this topic! I am having some fun with Blender! `:)`

For clarity…

I have not been texturing in Blender with an image and not exporting OBJ with materials (MTL file along with an image).

I have been:

- Importing an STL.
- Exporting an OBJ _without_ an MTL file (materials _ **not selected** _ in Geometry) when exporting.
- Texturing in Processing to the UV selected in Blender for the OBJ file. There is a whole menu of choices there!

I managed to “hide” one side of the moebius against the background like a chameleon:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/c/2/c2ea9c7ec37cf6bbee3a34b8c05e1c2fe10d1b9b.png)

When moved:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/6/9/698e77367edb8bbc2341ddaf918460dbeb372d3d.png)

Blender UV _**Project from View (bounds)**_ instead of _ **Cube Projection** _ used:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/5/d/5d959250dc9e17edfd19e79efaf879f8f97e3ae2.jpeg)

There are a lot of tutorials but I found this the most helpful for me at 0.75 speed:

[![](https://img.youtube.com/vi/jLGWE335J28/maxresdefault.jpg "Blender 3.0 Tutorial - How to Add An Image To An Object") ](https://www.youtube.com/watch?v=jLGWE335J28)

I am still new at using Blender but a quick study and there is a steep learning curve; I am familiar with similar tools so it was not so bad.

I just wanted to share the possibilities!

Have fun!

Here is the _output.obj_ file contents from example above:

> **Click here to expand!**
>
> ```auto
> # Blender 3.3.2
> # www.blender.org
> o moebius
> v 0.092979 -10.000000 -6.497766
> v 0.092977 -10.000000 -26.497763
> v 7.943732 -9.224739 -26.033792
> v 2.065114 -10.719337 -6.975777
> v 15.468362 -8.397884 -23.133814
> v 4.327799 -11.378731 -6.793613
> v 21.898245 -7.524071 -17.971388
> v 6.653658 -11.974487 -5.814240
> v 26.547266 -6.608175 -10.964819
> v 8.756917 -12.503277 -3.982616
> v 28.889872 -5.655327 -2.740299
> v 10.324458 -12.962145 -1.349014
> v 28.623285 -4.670853 5.929586
> v 11.055696 -13.348526 1.919895
> v 25.706329 -3.660254 14.205602
> v 10.706327 -13.660255 5.545347
> v 20.369663 -2.629189 21.270798
> v 9.129964 -13.895586 9.157281
> v 13.095910 -1.583416 26.418602
> v 6.311436 -14.053210 12.330485
> v 4.571361 -0.528791 29.129860
> v 2.386247 -14.132242 14.632577
> v -4.385411 0.528792 29.129856
> v -2.357919 -14.132242 15.678346
> v -12.909962 1.583417 26.418594
> v -7.499512 -14.053210 15.183702
> v -20.183710 2.629187 21.270794
> v -12.520610 -13.895586 13.011937
> v -25.520372 3.660255 14.205599
> v -16.860113 -13.660252 9.205606
> v -28.437328 4.670853 5.929581
> v -19.977224 -13.348522 3.998616
> v -28.703911 5.655329 -2.740303
> v -21.417524 -12.962145 -2.194254
> v -26.361309 6.608181 -10.964819
> v -20.873713 -12.503277 -8.811094
> v -21.712282 7.524071 -17.971395
> v -18.232813 -11.974485 -15.196592
> v -15.282398 8.397884 -23.133818
> v -13.603233 -11.378727 -20.670927
> v -7.757767 9.224739 -26.033792
> v -7.317233 -10.719334 -24.605593
> v 1.624573 9.224735 -5.547577
> v 2.648630 8.397884 -4.330723
> v 3.174183 7.524071 -3.039450
> v 3.269322 6.608175 -1.828894
> v 3.038070 5.655327 -0.802975
> v 2.595591 4.670853 -0.011066
> v 2.046075 3.660256 0.545349
> v 1.466866 2.629189 0.898426
> v 0.900994 1.583416 1.095589
> v 0.358759 0.528791 1.181063
> v -0.172801 -0.528791 1.181063
> v -0.715035 -1.583415 1.095589
> v -1.280907 -2.629185 0.898426
> v -1.860117 -3.660253 0.545350
> v -2.409632 -4.670849 -0.011066
> v -2.852111 -5.655325 -0.802975
> v -3.083362 -6.608175 -1.828894
> v -2.988225 -7.524067 -3.039448
> v -2.462671 -8.397881 -4.330723
> v -1.438616 -9.224735 -5.547575
> v 7.503192 10.719337 -24.605593
> v 13.789192 11.378727 -20.670927
> v 18.418766 11.974487 -15.196604
> v 21.059673 12.503279 -8.811092
> v 21.603483 12.962146 -2.194260
> v 20.163183 13.348524 3.998616
> v 17.046078 13.660254 9.205603
> v 12.706568 13.895587 13.011941
> v 7.685474 14.053212 15.183702
> v 2.543872 14.132246 15.678346
> v -2.200293 14.132246 14.632575
> v -6.125474 14.053212 12.330486
> v -8.944007 13.895590 9.157281
> v -10.520370 13.660255 5.545353
> v -10.869738 13.348526 1.919896
> v -10.138499 12.962147 -1.349012
> v -8.570958 12.503281 -3.982616
> v -6.467703 11.974491 -5.814238
> v -4.141840 11.378731 -6.793613
> v -1.879156 10.719341 -6.975777
> v 0.092977 10.000000 -26.497763
> v 0.092980 10.000000 -6.497766
> vn 0.0983 -0.9952 -0.0000
> vn -0.3763 -0.9074 -0.1872
> vn 0.1242 -0.9915 -0.0395
> vn -0.2395 -0.9131 -0.3299
> vn 0.1792 -0.9822 -0.0570
> vn -0.0608 -0.9103 -0.4094
> vn 0.2506 -0.9673 -0.0398
> vn 0.1352 -0.8997 -0.4150
> vn 0.3210 -0.9469 0.0183
> vn 0.3213 -0.8820 -0.3449
> vn 0.3713 -0.9212 0.1160
> vn 0.4708 -0.8577 -0.2067
> vn 0.3841 -0.8904 0.2441
> vn 0.5614 -0.8274 -0.0170
> vn 0.3466 -0.8547 0.3865
> vn 0.5774 -0.7915 0.2004
> vn 0.2528 -0.8142 0.5227
> vn 0.5122 -0.7505 0.4176
> vn 0.1053 -0.7693 0.6302
> vn 0.3694 -0.7048 0.6057
> vn -0.0850 -0.7202 0.6886
> vn 0.1627 -0.6547 0.7381
> vn -0.2995 -0.6672 0.6820
> vn -0.0857 -0.6007 0.7948
> vn -0.5141 -0.6107 0.6023
> vn -0.3476 -0.5432 0.7643
> vn -0.7026 -0.5509 0.4503
> vn -0.5922 -0.4824 0.6454
> vn -0.8400 -0.4883 0.2365
> vn -0.7899 -0.4189 0.4478
> vn -0.9058 -0.4231 -0.0202
> vn -0.9160 -0.3529 0.1910
> vn -0.8871 -0.3558 -0.2939
> vn -0.9535 -0.2849 -0.0981
> vn -0.7806 -0.2867 -0.5554
> vn -0.8960 -0.2152 -0.3884
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> vn -0.3420 -0.1447 -0.9285
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> vn -0.1012 -0.0733 0.9922
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> vn -0.9472 -0.2042 0.2473
> vn -0.6715 -0.2205 0.7074
> vn -0.9575 -0.2612 -0.1223
> vn -0.8432 -0.2929 0.4508
> vn -0.8251 -0.3090 -0.4730
> vn -0.9173 -0.3638 0.1622
> vn -0.5670 -0.3463 -0.7474
> vn -0.8931 -0.4325 -0.1233
> vn -0.2258 -0.3727 -0.9000
> vn -0.7819 -0.4989 -0.3738
> vn 0.1396 -0.3901 -0.9101
> vn -0.6042 -0.5623 -0.5646
> vn 0.4695 -0.4022 -0.7860
> vn -0.3865 -0.6226 -0.6804
> vn 0.7176 -0.4143 -0.5598
> vn -0.1580 -0.6793 -0.7166
> vn 0.8589 -0.4317 -0.2756
> vn 0.0541 -0.7322 -0.6789
> vn 0.8884 -0.4585 0.0220
> vn 0.2271 -0.7809 -0.5818
> vn 0.8160 -0.4971 0.2948
> vn 0.3465 -0.8252 -0.4460
> vn 0.6611 -0.5472 0.5133
> vn 0.4063 -0.8648 -0.2950
> vn 0.4491 -0.6058 0.6567
> vn 0.4098 -0.8995 -0.1514
> vn 0.2095 -0.6683 0.7138
> vn 0.3682 -0.9291 -0.0342
> vn -0.0265 -0.7295 0.6835
> vn 0.2985 -0.9534 0.0445
> vn -0.2300 -0.7847 0.5756
> vn 0.2199 -0.9722 0.0802
> vn -0.3773 -0.8310 0.4088
> vn 0.1513 -0.9855 0.0766
> vn -0.4531 -0.8669 0.2078
> vn 0.4531 0.8669 0.2078
> vn -0.1513 0.9855 0.0766
> vn 0.3773 0.8310 0.4088
> vn -0.2199 0.9722 0.0802
> vn 0.2300 0.7847 0.5756
> vn -0.2985 0.9534 0.0445
> vn 0.0265 0.7295 0.6835
> vn -0.3682 0.9291 -0.0342
> vn -0.2095 0.6683 0.7138
> vn -0.4098 0.8995 -0.1514
> vn -0.4491 0.6058 0.6567
> vn -0.4063 0.8648 -0.2950
> vn -0.6611 0.5472 0.5133
> vn -0.3465 0.8252 -0.4460
> vn -0.8160 0.4971 0.2948
> vn -0.2271 0.7809 -0.5818
> vn -0.8884 0.4585 0.0220
> vn -0.0541 0.7322 -0.6789
> vn -0.8589 0.4317 -0.2756
> vn 0.1580 0.6793 -0.7166
> vn -0.7176 0.4143 -0.5598
> vn 0.3865 0.6226 -0.6804
> vn -0.4695 0.4022 -0.7860
> vn 0.6042 0.5623 -0.5646
> vn -0.1396 0.3901 -0.9101
> vn 0.7819 0.4989 -0.3738
> vn 0.2258 0.3727 -0.9000
> vn 0.8931 0.4325 -0.1233
> vn 0.5670 0.3463 -0.7474
> vn 0.9173 0.3638 0.1622
> vn 0.8251 0.3090 -0.4730
> vn 0.8432 0.2929 0.4508
> vn 0.9575 0.2612 -0.1223
> vn 0.6715 0.2205 0.7074
> vn 0.9472 0.2042 0.2473
> vn 0.4156 0.1471 0.8976
> vn 0.8025 0.1404 0.5800
> vn 0.1012 0.0733 0.9922
> vn 0.2474 -0.0000 -0.9689
> vn 0.0517 0.0725 -0.9960
> vn 0.5237 0.0724 -0.8488
> vn 0.3420 0.1447 -0.9285
> vn 0.7478 0.1442 -0.6481
> vn 0.5932 0.2162 -0.7755
> vn 0.8960 0.2152 -0.3884
> vn 0.7806 0.2867 -0.5554
> vn 0.9535 0.2849 -0.0981
> vn 0.8871 0.3558 -0.2939
> vn 0.9160 0.3529 0.1910
> vn 0.9058 0.4231 -0.0202
> vn 0.7899 0.4189 0.4478
> vn 0.8400 0.4883 0.2365
> vn 0.5922 0.4824 0.6454
> vn 0.7026 0.5509 0.4503
> vn 0.3476 0.5432 0.7643
> vn 0.5141 0.6107 0.6023
> vn 0.0857 0.6007 0.7948
> vn 0.2995 0.6672 0.6820
> vn -0.1627 0.6547 0.7381
> vn 0.0850 0.7202 0.6886
> vn -0.3694 0.7048 0.6057
> vn -0.1053 0.7693 0.6302
> vn -0.5122 0.7505 0.4176
> vn -0.2528 0.8142 0.5227
> vn -0.5774 0.7915 0.2004
> vn -0.3466 0.8547 0.3865
> vn -0.5614 0.8274 -0.0170
> vn -0.3841 0.8904 0.2441
> vn -0.4708 0.8577 -0.2067
> vn -0.3713 0.9212 0.1160
> vn -0.3213 0.8820 -0.3449
> vn -0.3210 0.9469 0.0183
> vn -0.1352 0.8997 -0.4150
> vn -0.2506 0.9673 -0.0398
> vn 0.0608 0.9103 -0.4094
> vn -0.1792 0.9822 -0.0570
> vn 0.2395 0.9131 -0.3299
> vn -0.1242 0.9915 -0.0395
> vn 0.3763 0.9074 -0.1872
> vn -0.0983 0.9952 -0.0000
> vn 0.5518 0.0717 0.8309
> vn -0.2356 -0.0000 0.9719
> vn -0.4516 -0.8922 -0.0000
> vn 0.1078 -0.9932 0.0446
> vn -0.2474 -0.0000 -0.9689
> vn -0.0517 -0.0725 -0.9960
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> vn -0.5518 -0.0717 0.8309
> vn 0.4516 0.8922 -0.0000
> vn -0.1078 0.9932 0.0446
> vt 0.655720 0.840130
> vt 0.042995 0.748934
> vt 0.935335 0.665666
> vt 0.668669 0.798999
> vt 0.975760 0.350319
> vt 0.667668 0.734334
> vt 0.566347 0.684238
> vt 0.398999 0.002002
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> vt 0.990854 0.587605
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> vt 0.267668 0.001001
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> vt 0.042995 0.963238
> vt 0.773367 0.452030
> vt 0.132332 0.398999
> vt 0.636313 0.991659
> vt 0.026321 0.752665
> vt 0.856802 0.601524
> vt 0.982157 0.000000
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> vt 0.667668 0.797998
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> vt 0.856802 0.400909
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> vt 0.964811 0.019997
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> vt 0.279327 0.496372
> vt 0.026321 0.748934
> vt 0.975760 0.587625
> vt 0.655720 0.654428
> vt 0.481760 0.819809
> vt 0.279327 0.753849
> vt 0.464136 0.400909
> vt 0.878605 0.846724
> vt 0.261541 0.513006
> vt 0.288551 0.477770
> vt 0.684436 0.649572
> vt 0.813896 0.028631
> vt 0.481760 0.500263
> vt 0.959325 0.720769
> vt 0.291013 0.506405
> vt 0.839973 0.012779
> vt 0.481760 0.604794
> vt 1.000000 0.572920
> vt 0.288469 0.542273
> vt 0.874414 0.000000
> vt 0.998461 0.852801
> vt 0.428452 0.717355
> vt 0.464462 0.704445
> vt 0.733366 0.037630
> vt 0.995371 0.417064
> vt 0.279557 0.582302
> vt 0.813894 0.260707
> vt 0.986550 0.601525
> vt 0.467335 0.704444
> vt 0.994711 0.253115
> vt 0.910055 0.614682
> vt 0.813894 0.000000
> vt 0.986550 0.858694
> vt 0.172945 0.531749
> vt 0.944724 0.268289
> vt 0.949949 0.624311
> vt 0.261541 0.756789
> vt 0.958143 0.340982
> vt 0.949950 0.601525
> vt 0.066969 1.000000
> vt 0.927446 0.011788
> vt 0.261541 0.496372
> vt 0.958143 0.601525
> vt 0.062140 0.496372
> vt 0.852064 0.141280
> vt 0.921234 0.361018
> vt 0.279556 0.387392
> vt 0.964811 0.000000
> vt 0.332634 0.714070
> vt 0.019209 0.402987
> vt 0.725770 0.048739
> vt 0.256929 0.351070
> vt 0.380274 0.704444
> vt 0.109069 0.965611
> vt 0.279556 0.719913
> vt 0.000000 0.296507
> vt 0.577758 0.000000
> vt 0.243223 0.302011
> vt 0.332634 0.704444
> vt 0.099328 0.986935
> vt 0.874414 0.022064
> vt 0.005714 0.187029
> vt 0.422242 0.000000
> vt 0.241424 0.243992
> vt 0.927447 0.000000
> vt 0.077389 0.999479
> vt 0.380273 0.729494
> vt 0.035023 0.084978
> vt 0.274230 0.048740
> vt 0.253401 0.182327
> vt 0.428452 0.704444
> vt 0.172945 0.748933
> vt 0.084210 0.000000
> vt 0.300998 0.400909
> vt 0.147936 0.141280
> vt 0.279556 0.123367
> vt 0.536310 0.348705
> vt 0.122992 0.748645
> vt 0.284005 0.300079
> vt 0.055276 0.268289
> vt 0.524955 0.290066
> vt 0.063520 0.732058
> vt 0.279556 0.192898
> vt 0.004629 0.417064
> vt 0.520724 0.218906
> vt 0.000000 0.699073
> vt 0.088929 0.969444
> vt 0.767048 0.878427
> vt 0.286802 0.089645
> vt 0.000000 0.572920
> vt 0.524514 0.141525
> vt 0.689550 0.878427
> vt 0.055290 0.993704
> vt 0.839708 0.636398
> vt 0.303764 0.000000
> vt 0.689550 0.440331
> vt 0.040675 0.720769
> vt 0.536310 0.065468
> vt 0.773366 0.667885
> vt 0.839706 0.601526
> vt 0.910055 0.601524
> vt 0.480626 0.958365
> vt 0.856802 0.396305
> vt 0.773366 0.400909
> vt 0.839706 0.849281
> vt 0.733367 0.241984
> vt 0.121395 0.846724
> vt 0.773365 0.621612
> vt 0.733367 0.000000
> vt 0.921234 0.358425
> vt 0.689550 0.649572
> vt 0.634129 0.249235
> vt 0.233038 0.939528
> vt 0.651824 0.009733
> vt 0.620640 0.638160
> vt 0.536310 0.246706
> vt 0.363688 0.991659
> vt 0.001001 0.267668
> vt 0.561427 0.011473
> vt 0.548870 0.601753
> vt 0.397998 0.001001
> vt 0.001001 0.397998
> vt 0.026321 0.933807
> vt 0.975760 0.340983
> vt 0.934334 0.534334
> vt 0.526593 0.623385
> vt 0.958143 0.353014
> vt 0.684436 0.838722
> vt 0.845255 0.276465
> vt 0.544374 0.601510
> vt 0.860840 0.263980
> vt 0.553499 0.578297
> vt 0.874414 0.252987
> vt 0.998461 0.601526
> vt 0.555151 0.556536
> vt 0.986550 0.612560
> vt 0.467335 0.957551
> vt 0.994711 0.000000
> vt 0.551136 0.538093
> vt 0.982156 0.010131
> vt 0.949950 0.854537
> vt 0.066969 0.748933
> vt 0.543453 0.523857
> vt 0.055290 0.759159
> vt 0.964811 0.252137
> vt 0.372561 0.956393
> vt 0.533912 0.513855
> vt 0.380274 0.943913
> vt 0.109069 0.748934
> vt 0.523855 0.507508
> vt 0.099328 0.759835
> vt 0.332634 0.941086
> vt 0.099328 0.748934
> vt 0.514030 0.503963
> vt 0.088929 0.758840
> vt 0.927447 0.239556
> vt 0.077389 0.748934
> vt 0.504615 0.502427
> vt 0.066969 0.758656
> vt 0.428452 0.951126
> vt 0.172945 0.496372
> vt 0.495385 0.502427
> vt 0.162846 0.506495
> vt 0.485971 0.503963
> vt 0.151669 0.515734
> vt 0.476145 0.507508
> vt 0.139128 0.523645
> vt 0.088929 0.748933
> vt 0.466088 0.513855
> vt 0.077389 0.758181
> vt 0.761343 0.667884
> vt 0.055290 0.748933
> vt 0.456547 0.523857
> vt 0.042995 0.759300
> vt 0.910055 0.831978
> vt 0.480626 0.704444
> vt 0.448864 0.538093
> vt 0.467335 0.715461
> vt 0.921234 0.601524
> vt 0.689550 0.400909
> vt 0.444849 0.556536
> vt 0.675020 0.412230
> vt 0.446501 0.578297
> vt 0.656784 0.419905
> vt 0.455626 0.601510
> vt 0.473407 0.623385
> vt 0.998999 0.665666
> vt 0.990854 0.340982
> vt 0.635336 0.422324
> vt 0.268669 0.132332
> vt 0.132332 0.268669
> vt 0.628663 0.965985
> vt 0.737807 0.895253
> vt 0.818190 0.796843
> vt 0.864044 0.682052
> vt 0.873487 0.563104
> vt 0.848479 0.451776
> vt 0.794356 0.358172
> vt 0.719010 0.289747
> vt 0.631828 0.250706
> vt 0.542555 0.241814
> vt 0.460182 0.260613
> vt 0.392029 0.301997
> vt 0.343091 0.359041
> vt 0.315721 0.423971
> vt 0.309655 0.489145
> vt 0.322351 0.547909
> vt 0.349568 0.595253
> vt 0.386087 0.628179
> vt 0.426471 0.645785
> vt 0.465758 0.649059
> vt 0.998999 0.535335
> vt 0.798999 0.735335
> vt 0.398999 0.132332
> vt 0.267668 0.131331
> vt 0.131331 0.267668
> vt 0.500000 1.000000
> vt 0.798999 0.798999
> vt 0.797998 0.734334
> vt 0.997998 0.534334
> vt 0.500000 0.640467
> s 0
> f 1/1/1 2/7/1 3/13/1
> f 3/14/2 4/18/2 1/2/2
> f 4/19/3 3/15/3 5/24/3
> f 5/25/4 6/28/4 4/20/4
> f 6/29/5 5/26/5 7/34/5
> f 7/35/6 8/38/6 6/30/6
> f 8/39/7 7/36/7 9/42/7
> f 9/42/8 10/44/8 8/39/8
> f 10/44/9 9/42/9 11/46/9
> f 11/46/10 12/48/10 10/44/10
> f 12/48/11 11/46/11 13/52/11
> f 13/52/12 14/55/12 12/48/12
> f 14/56/13 13/53/13 15/61/13
> f 15/62/14 16/65/14 14/57/14
> f 16/66/15 15/63/15 17/71/15
> f 17/72/16 18/75/16 16/67/16
> f 18/76/17 17/73/17 19/79/17
> f 19/79/18 20/81/18 18/76/18
> f 20/81/19 19/79/19 21/85/19
> f 21/85/20 22/87/20 20/81/20
> f 22/87/21 21/85/21 23/91/21
> f 23/91/22 24/93/22 22/87/22
> f 24/93/23 23/91/23 25/97/23
> f 25/97/24 26/99/24 24/93/24
> f 26/99/25 25/97/25 27/102/25
> f 27/102/26 28/105/26 26/99/26
> f 28/106/27 27/103/27 29/108/27
> f 29/108/28 30/110/28 28/106/28
> f 30/110/29 29/108/29 31/112/29
> f 31/112/30 32/114/30 30/110/30
> f 32/114/31 31/112/31 33/118/31
> f 33/118/32 34/120/32 32/114/32
> f 34/120/33 33/118/33 35/124/33
> f 35/124/34 36/127/34 34/120/34
> f 36/128/35 35/125/35 37/133/35
> f 37/134/36 38/137/36 36/129/36
> f 38/138/37 37/135/37 39/141/37
> f 39/141/38 40/143/38 38/138/38
> f 40/143/39 39/141/39 41/145/39
> f 41/145/40 42/148/40 40/143/40
> f 43/152/41 4/21/41 6/31/41
> f 6/32/42 44/156/42 43/153/42
> f 44/157/43 6/33/43 8/40/43
> f 8/41/44 45/160/44 44/158/44
> f 45/160/45 8/41/45 10/45/45
> f 10/45/46 46/162/46 45/160/46
> f 46/162/47 10/45/47 12/49/47
> f 12/50/48 47/165/48 46/163/48
> f 47/166/49 12/51/49 14/58/49
> f 14/59/50 48/169/50 47/167/50
> f 48/170/51 14/60/51 16/68/51
> f 16/69/52 49/173/52 48/171/52
> f 49/174/53 16/70/53 18/77/53
> f 18/78/54 50/177/54 49/175/54
> f 50/177/55 18/78/55 20/82/55
> f 20/83/56 51/180/56 50/178/56
> f 51/181/57 20/84/57 22/88/57
> f 22/89/58 52/184/58 51/182/58
> f 52/185/59 22/90/59 24/94/59
> f 24/95/60 53/188/60 52/186/60
> f 53/189/61 24/96/61 26/100/61
> f 26/101/62 54/192/62 53/190/62
> f 54/192/63 26/101/63 28/107/63
> f 28/107/64 55/194/64 54/192/64
> f 55/194/65 28/107/65 30/111/65
> f 30/111/66 56/196/66 55/194/66
> f 56/196/67 30/111/67 32/115/67
> f 32/116/68 57/199/68 56/197/68
> f 57/200/69 32/117/69 34/121/69
> f 34/122/70 58/203/70 57/201/70
> f 58/204/71 34/123/71 36/130/71
> f 36/131/72 59/207/72 58/205/72
> f 59/208/73 36/132/73 38/139/73
> f 38/140/74 60/211/74 59/209/74
> f 60/211/75 38/140/75 40/144/75
> f 40/144/76 61/213/76 60/211/76
> f 61/213/77 40/144/77 42/149/77
> f 42/149/78 62/218/78 61/213/78
> f 63/221/79 43/155/79 44/159/79
> f 44/159/80 64/222/80 63/221/80
> f 64/222/81 44/159/81 45/161/81
> f 45/161/82 65/223/82 64/222/82
> f 65/223/83 45/161/83 46/164/83
> f 46/164/84 66/224/84 65/223/84
> f 66/224/85 46/164/85 47/168/85
> f 47/168/86 67/225/86 66/224/86
> f 67/225/87 47/168/87 48/172/87
> f 48/172/88 68/226/88 67/225/88
> f 68/226/89 48/172/89 49/176/89
> f 49/176/90 69/227/90 68/226/90
> f 69/227/91 49/176/91 50/179/91
> f 50/179/92 70/228/92 69/227/92
> f 70/228/93 50/179/93 51/183/93
> f 51/183/94 71/229/94 70/228/94
> f 71/229/95 51/183/95 52/187/95
> f 52/187/96 72/230/96 71/229/96
> f 72/230/97 52/187/97 53/191/97
> f 53/191/98 73/231/98 72/230/98
> f 73/231/99 53/191/99 54/193/99
> f 54/193/100 74/232/100 73/231/100
> f 74/232/101 54/193/101 55/195/101
> f 55/195/102 75/233/102 74/232/102
> f 75/233/103 55/195/103 56/198/103
> f 56/198/104 76/234/104 75/233/104
> f 76/234/105 56/198/105 57/202/105
> f 57/202/106 77/235/106 76/234/106
> f 77/235/107 57/202/107 58/206/107
> f 58/206/108 78/236/108 77/235/108
> f 78/236/109 58/206/109 59/210/109
> f 59/210/110 79/237/110 78/236/110
> f 79/237/111 59/210/111 60/212/111
> f 60/212/112 80/238/112 79/237/112
> f 80/238/113 60/212/113 61/214/113
> f 61/214/114 81/239/114 80/238/114
> f 81/239/115 61/214/115 62/215/115
> f 62/215/116 82/240/116 81/239/116
> f 2/8/117 83/243/117 63/219/117
> f 63/220/118 3/16/118 2/9/118
> f 3/17/119 63/221/119 64/222/119
> f 64/222/120 5/27/120 3/17/120
> f 5/27/121 64/222/121 65/223/121
> f 65/223/122 7/37/122 5/27/122
> f 7/37/123 65/223/123 66/224/123
> f 66/224/124 9/43/124 7/37/124
> f 9/43/125 66/224/125 67/225/125
> f 67/225/126 11/47/126 9/43/126
> f 11/47/127 67/225/127 68/226/127
> f 68/226/128 13/54/128 11/47/128
> f 13/54/129 68/226/129 69/227/129
> f 69/227/130 15/64/130 13/54/130
> f 15/64/131 69/227/131 70/228/131
> f 70/228/132 17/74/132 15/64/132
> f 17/74/133 70/228/133 71/229/133
> f 71/229/134 19/80/134 17/74/134
> f 19/80/135 71/229/135 72/230/135
> f 72/230/136 21/86/136 19/80/136
> f 21/86/137 72/230/137 73/231/137
> f 73/231/138 23/92/138 21/86/138
> f 23/92/139 73/231/139 74/232/139
> f 74/232/140 25/98/140 23/92/140
> f 25/98/141 74/232/141 75/233/141
> f 75/233/142 27/104/142 25/98/142
> f 27/104/143 75/233/143 76/234/143
> f 76/234/144 29/109/144 27/104/144
> f 29/109/145 76/234/145 77/235/145
> f 77/235/146 31/113/146 29/109/146
> f 31/113/147 77/235/147 78/236/147
> f 78/236/148 33/119/148 31/113/148
> f 33/119/149 78/236/149 79/237/149
> f 79/237/150 35/126/150 33/119/150
> f 35/126/151 79/237/151 80/238/151
> f 80/238/152 37/136/152 35/126/152
> f 37/136/153 80/238/153 81/239/153
> f 81/239/154 39/142/154 37/136/154
> f 39/142/155 81/239/155 82/240/155
> f 82/240/156 41/146/156 39/142/156
> f 41/146/157 82/240/157 84/250/157
> f 84/250/158 83/246/158 41/146/158
> f 82/241/159 62/216/159 1/3/159
> f 1/4/160 84/247/160 82/242/160
> f 2/10/161 1/5/161 62/217/161
> f 62/218/162 42/149/162 2/11/162
> f 83/244/163 2/12/163 42/150/163
> f 42/151/164 41/147/164 83/245/164
> f 84/248/165 1/6/165 4/22/165
> f 4/23/166 43/154/166 84/249/166
> f 83/246/167 84/250/167 43/155/167
> f 43/155/168 63/221/168 83/246/168
> 
> ```

You will have to supply a texture image of your choice.

`:)`

---

<div class="post-metadata">

**Author:** ![svan](https://avatars.discourse-cdn.com/v4/letter/s/82dd89/32.png) [@svan](https://discourse.processing.org/u/svan)\
**Post date:** [December 28, 2022, 3:44am UTC](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293/41 "2022-12-28T03:44:36Z")

</div>

Nice obj. Textures up easily. No .mtl file?

I noticed that your obj file had no _mtllib xxxx.mtl_ line of code at the top. Did you delete it or was it just not put there by Blender? Apparently if that line is not there it makes it easier for Processing users to add their own textures.

Below is a file that I created in Blender from an imported .stl and edited using the **Project from View** setting. It included an .mtl file with the exported .obj file, but if I REM out the _mtllib_ line out of the first line of the .obj file then I can also easily add my own texture just like I did with your obj file.

![mtl](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/9/8/9857afd3fe0aab347734d14eab4a3c9ad25f778d.png)

 ![moebius](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/0/d/0d496a33e657d97a970585ea5385b179cf1a78b2.png)

In summary, apparently if you leave out the .mtl file (ie mtllib reference to it in obj file) it’s possible to add your own texture easily. It also looks like this only works if you create the .obj file in Blender. I didn’t have similar luck using an online converter (stl to obj).

**Addendum:**  
I just now realized that those .stl files are for 3D printers. The images that are shown with the file are not textures to be used, but are the output from a 3D printer. No wonder I couldn’t get them to work as a texture. Homemade images work much better (or official downloaded texture files). Custom bulldog below came from a Blender converted .stl file with my own .png file and **no .mtl file** :

 ![bulldog](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/5/3/53c24e4261acd50d2f14dbd3f39302c76176cb11.png)

**Second Addendum:**  
Turns out Blender adds a **blank**.mtl file when using **Project from View** so you don’t really have to REM out the first line of the obj file; it will also work with your own graphic file just as easily if you leave the first line in place in the .obj file.

[Previous page](https://discourse.processing.org/t/stl-3d-model-exported-into-obj-file/40293.md?page=1)