When I set the camera position to be gym.set_camera_location(ch, env, gymapi.Vec3(0,0,1.5), gymapi.Vec3(0,0,0.5))
I got black images.
However, if I set the camera position to be gym.set_camera_location(ch, env, gymapi.Vec3(0,0.00001,1.5), gymapi.Vec3(0,0,0.5))
I got normal images.