This is a really bad pict but it shows the lighting effect I'm talking about. Since we're at it. I got one for you but I don't know how I did it or why it occurs. I used a simple cylinder as a filter lens size 20:20:20 standard glass material. placed the lens halfway into the camera. It only happens at certain angles. removed the objects and it still happens. anybody know why this occurs? I think its a neat effect but wish I could make it happen at all angles. If I know why it happens then I have a chance to do this?  - Suggestions? answers? alms for the poor?