pybullet GUI and pyrender issue

[shivanimall]

Hello,

I am on MacOS. I am using pybullet.GUI to connect to physics client as follows: self.physicsClient = pb.connect(pb.GUI)
In addition, I am using pyrender to render some other images in parallel. following pyrender code is called and results in the shown error:

    retval = self._renderer.render(scene, flags, seg_node_map)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pyrender/renderer.py", line 144, in render
    retval = self._forward_pass(scene, flags, seg_node_map=seg_node_map)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pyrender/renderer.py", line 326, in _forward_pass
    self._configure_forward_pass_viewport(flags)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pyrender/renderer.py", line 1013, in _configure_forward_pass_viewport
    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, self._main_fb_ms)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/OpenGL/error.py", line 228, in glCheckError
    raise GLError(
OpenGL.error.GLError: GLError(
	err = 1282,
	description = b'invalid operation',
	baseOperation = glBindFramebuffer,
	cArguments = (GL_DRAW_FRAMEBUFFER, 2)
)

Can you please suggest a fix?
Thank you, please let me know if you need more details or if anything is unclear.

[erwincoumans]

On Mac, OpenGL happens in the main thread, and you cannot mix two OpenGL instances. Use a separate process (or multiprocessing)

[shivanimall]

thank you! let me try this!