Here is a render I'm working on lighting. To make it simple here is my scene with just one spotlight in it. There is a line of light just beneath the edges of the stairsteps. This happens to me all the time. I always have to paint in the shadow in Photoshop. I made these stairs in AutoCad and brought them into Poser using UVMapperPro. I always fillet/bevel edges on models so that they catch the light properly. I don't know if it has to do with that (some modeling problem) or some shadow setting I'm not aware of. Thanks and Regards...