Hi Picnic, I used to go crazy in Bryce 3D doing pre-renders, that is until Bryce 4 came along.......... Here's how I set things up. In the render menu, the only things I have checked are antialiasing off, and spatial optimization high, (which is great if you have a lot of objects in the scene and ESPECIALLY if you have a lot of DFX objects, it will really speed things up). Once I do as much as I can in wireframe, I render in Fast Preview Mode. If I want to reposition something, (or add something,) I hit Esc to go to wireframe, and I move it. Hit ESC again to bring back the previous render. Go to the right side of the screen and get the RaySpray, (I LOVE THAT THING!). Now you can use it to "erase" the object from the old position and bring it up in the new one while looking at your rendered scene. What you see is your new render. You can do this hundreds of times if you wish, and you don't have to keep rendering the entire scene over and over, you're only rendering the area you change with the RaySpray, (I LOVE THAT THING!) and you always see your full scene rendered. You can change the size and shape of the RaySpray (I LOVE THAT THING!) by hitting the 1 through 0 keys. 1 through 5, circular sprays, 6 through 0, square sprays. You can work so much faster this way, it's amazing. I hope this is some help. Coldrake Well you can call me Ray, or you can call me Spray, or you can call me R Spray, but ya doesn't hafta call me Coldrake! ; )