# Graphics output distorted, rainbow noise

**URL:** <https://discourse.processing.org/t/graphics-output-distorted-rainbow-noise/21563>\
**Category:** Processing\
**Created:** [June 4, 2020, 3:30pm UTC](https://discourse.processing.org/t/graphics-output-distorted-rainbow-noise/21563 "2020-06-04T15:30:06Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![andyandyandy](https://avatars.discourse-cdn.com/v4/letter/a/ba9def/32.png) [@andyandyandy](https://discourse.processing.org/u/andyandyandy)\
**Post date:** [June 4, 2020, 3:30pm UTC](https://discourse.processing.org/t/graphics-output-distorted-rainbow-noise/21563/1 "2020-06-04T15:30:06Z")

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Hello!

I’m running a simple program that should create a new sketch and draw it on the screen, but the output is this interesting rainbow noise:  
 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/a/ad7232738cae4f362452177a634e67e77bb82eeb.png)

I’m compiling manually with Java using Processing 3.5.4.  
Let me know if any of you have seen this before!

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**Author:** ![andyandyandy](https://avatars.discourse-cdn.com/v4/letter/a/ba9def/32.png) [@andyandyandy](https://discourse.processing.org/u/andyandyandy)\
**Post date:** [June 4, 2020, 5:16pm UTC](https://discourse.processing.org/t/graphics-output-distorted-rainbow-noise/21563/2 "2020-06-04T17:16:37Z")

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I’m running this on Alpine Linux, using Xvfb as display.  
I see the same problem for all versions of Processing.

I can display to the screen using other processes (like imagemagick), so the issue is isolated to Processing

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**Author:** ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Post date:** [June 6, 2020, 6:19pm UTC](https://discourse.processing.org/t/graphics-output-distorted-rainbow-noise/21563/3 "2020-06-06T18:19:12Z")

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What is the code content of the sketch that you are compiling? What is the expected output – a black screen?

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**Author:** ![andyandyandy](https://avatars.discourse-cdn.com/v4/letter/a/ba9def/32.png) [@andyandyandy](https://discourse.processing.org/u/andyandyandy)\
**Post date:** [June 15, 2020, 12:02pm UTC](https://discourse.processing.org/t/graphics-output-distorted-rainbow-noise/21563/4 "2020-06-15T12:02:19Z")

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It was a grey background  
I figured out the issue here was compiling without a few of the .jar files.  
It might be helpful to have some documentation on which .jars are needed when compiling Java manually, but otherwise this is resolved! Thanks