@redPhantom

Thank you ver much for your tips. I know this tricks, but unfortunately they do not fix my problem

The slow down effect is already evident in the simple start scene. It is subtle but makes poser useless for my complex scenes.

The difference before and after the update is that if I move the shadernode here with the mouse like the red arrow line, it moves with 30 frames/s before the update but after the update it moves only with 10 frames/s. the movement is no longer fluid and becomes jerky after the updates. In Complex scenes I have to be happy if it still reacts at all.

Already when starting up or when switching around in the Poser's material editor, I notice that everything is only half as fast. But rendering or moving the camera in preview mode is still normal fast. It mainly affects the reaction time of material editor. This slowdown is also with Poser 12 in clean new installation and on all PCs that I have tested so far. In the meantime, I just assume that it just doesn't bother people because they don't have really heavy scenes. I work at scenes with up to 1.5GB filesize. So Poser is not usable for me anymore if it slows down. The future is more complex scenes not less complex. Poser should get faster not slower.