Shadow Mapping Doesn't Work on MacOS about pyrender HOT 1 OPEN

    return self.renderer.render(scene, flags=RenderFlags.SHADOWS_ALL)
  File "/Users/bamberg/miniconda/envs/shrek/lib/python3.6/site-packages/pyrender/offscreen.py", line 100, in render
    return self._renderer.render(scene, flags)
  File "/Users/bamberg/miniconda/envs/shrek/lib/python3.6/site-packages/pyrender/renderer.py", line 140, in render
    retval = self._forward_pass(scene, flags)
  File "/Users/bamberg/miniconda/envs/shrek/lib/python3.6/site-packages/pyrender/renderer.py", line 345, in _forward_pass
    primitive, flags, ProgramFlags.USE_MATERIAL
  File "/Users/bamberg/miniconda/envs/shrek/lib/python3.6/site-packages/pyrender/renderer.py", line 963, in _get_primitive_program
    program._add_to_context()
  File "/Users/bamberg/miniconda/envs/shrek/lib/python3.6/site-packages/pyrender/shader_program.py", line 135, in _add_to_context
    self._program_id = gl_shader_utils.compileProgram(*shader_ids)
  File "/Users/bamberg/miniconda/envs/shrek/lib/python3.6/site-packages/OpenGL/GL/shaders.py", line 196, in compileProgram
    program.check_validate()
  File "/Users/bamberg/miniconda/envs/shrek/lib/python3.6/site-packages/OpenGL/GL/shaders.py", line 108, in check_validate
    glGetProgramInfoLog( self ),
RuntimeError: Validation failure (0): b"Validation Failed: Sampler error:\n  Samplers of different types use the same texture image unit.\n   - or -\n  A sampler's texture unit is out of range (greater than max allowed or negative).\n"