This problem is in Bryce 4. I don't have exactly the same problem in Bryce 3, but it is basically the same. I have been trying to move the water texture of an object around approximately 360 degrees to create a cycling animation, but this hasn't been working out. I tried revolving it just 180 degrees, and even less than that, but the same thing always occurs: I move the slider in the Materials lab to the frame I want it to be at, set the keyframe and rotate the material, then when I move the slider again, the values I just entered disappear, falling back down to the original value! Is there any advice that you guys have for me? Thanks in advance, Akril