Import any 3D OBJ or STL file into vpython

You milk_blender.obj file looks similar to the demo file

Which contains vertices, normals and texture elements.

and that box with the texture is displayed in the demo program.

So you should compare the milk_blender.mtl file with the box.mtl file contents.

and see if you can get your milk_blender.obj file to load with the demo program

try modifying this by adding the line

box7 = Wavefront(‘milk_blender.obj’)

and also add lines at the end

boxes.append(obj_to_triangles(box7))
boxes[-1].visible = True
boxes[-1].up = vec(1,1,1)
boxes[-1].pos = vec(8,-2,0)

Then run the file

python vpython_load_obj_test.py

and see what it produces.  You might need to modify your milk_blender.mtl file to have the same fields as box.mtl in the example. 

For instance box.mtl has a line

map_Kd box.png

but your mtl file doesn’t have a line like this.

John