"I use Bryce. Its probably an overstatment to say that its screen updates are "instantaneous." " As close to instantenous as an 3D-app out there that I've used. And when scenes get really complex, and it does bog down, the cool thing is you can adjust how many polygons show (and when!) ... very cool feature. I really wish Vue Pro had this, guess it does not? "Keyframing controls in Vue Pro and in Mover are just great! I really liked developing and editing several animations I just made in Vue Pro with these. Fine quality and very standard keyframing abilities!" Ok, so are you saying they are much improved over Vue 4's then? They would have to be, as I consider Vue's pretty horrible. "Vue Pro offers four types of animation sequences, "Ease-In/Ease Out" now being just one of the offerings. I knowm, Vue offers these as well. However, even on standard Vue takes it upon itself to ramp up and ramp down at the end of an animation, no matter what. Just try it ... Measure the distance travelled per frame at the beginning of a two-keyframe animation, and you will see that movement within the first few frames is less than partway through the animation. -Tim