Using a starfield as a image shader, camera projection in the Background I get some serious star jitters in my animation. GI is set to zero. Any suggestions
Terragen's renderer animates best when the texture position does not change with respect to a surface (including the background sphere). If your camera is moving and you have camera projection, the background sphere will sample the image differently on each frame.
Two possible solutions:
1) Use an image that is not higher in resolution than the final image. May need to go even lower res if the render detail is less than 1.
or
2) Use a separate, fixed, camera for the image projection. I think this is the best solution all round, since I don't think you want the background stars to follow your camera's movement anyway. You can use high resolution image maps using this technique.
Matt