This seems to happen more when a particle system has a lot of emitters but sometimes changes don’t update. In this example I have a mesh that won’t rotate even though earlier the same mesh wouldn’t accept the correct override material but would accept the rotation. It should be toward the camera but as you can see from the curvature it bends away from the camera. I find deleting the nodes and emitters and remaking them helps but that’s tedious. Has anyone experienced similar issues?