Neil,
It sounds like you missed a vital (and unfortunately non-retrospective) step when you set up your animation. Before you begin rendering under "Output" you set the frame rate, browse to a folder where you want to save all your frames and set the filetype, tiff, png, jpg, etc from there. Then you start the render and as each frame completes VfSU will save it to that folder (numbered accordingly). Then you can use software like VirtualDub to convert to avi.
Jackson
hi there..
thanks for the how to do tutorial..
the problem i am facing is that when i set a filename and its location Vray renders and overwrites that single image for every frame it renders. so at the end of the animation i get just single image. Please do help me. i am doing distributed rendering by a workaround i found in this forum.