This is my .obj . It is a tetrahedron
Blender v2.82 (sub 7) OBJ File: ‘’
www.blender.org
mtllib untitled.mtl
o Cube_Cube.001
v -13.811712 6.379276 8.026554
v -13.811712 -13.620724 -11.973446
v 6.188288 -13.620724 8.026554
v 6.188288 6.379276 -11.973446
vt 0.000000 0.000000
vt 0.000000 0.000000
vt 0.000000 0.000000
vt 0.000000 0.000000
vn 0.5774 0.5774 -0.5774
vn -0.5774 0.5774 0.5774
vn 0.5774 -0.5774 0.5774
vn -0.5774 -0.5774 -0.5774
usemtl None
s off
f 1/1/1 3/2/1 2/3/1
f 3/2/2 4/4/2 2/3/2
f 1/1/3 2/3/3 4/4/3
f 3/2/4 1/1/4 4/4/4
Image