Hi,
after some work I am now using the 3d picture indicator, although it still appears to be a bit slower than the render window.
Finally, the animation would be controlled using an external hardware device. In the meantime, for development, I use the keyboard to control it: you can listen for mouse and keyboard events using the DirectX VIs (look for Connectivity -> Input Device Control palette.). This also works with a full screen render window in front of the original VI.
But since I'm back to the normal 3D picture indicator, I'm also back to normal keyboard events.
Regards
Matthias