You don't necessarily need to cycle the texture in the DTE to get the loop right... You should just be looping the bump map in the Animation editor. BUT, if you do need to loop stuff in the DTE it is possible. The problem lies in Bryce not being very powerful or capable with it's animation. What will happen is that the changes you make in the DTE will not "key" properly, and you'll find yourself changing things in other keys for no apparent reason. The workaround is to save the texture in your library, a different save for each keyframe that is important. Then you can call them up, and Bryce WILL recognize the changes... Sounds nebulous, but you'll see what I mean if you try it. Get back to us on your results, I've done this many times with success and it's quite possible to do, although Bryce is hardly the best tool to do it with.