HI Danmo, Like regular textures, the pixel density should be equal to or greater than the final output size. Mine happen to be 640 x 480 pixels. However, you could get away with less since the displacement filter has a smoothing option that does a pretty good job of eliminating "jaggies". The movies can be in whatever format you codecs for. Frame rate needs to be at or above the final frame rate of your finished movie. Mark