Hi, I have been playing and it ended up with this image (So far). The scene has an atmosphere and one bulb. It is the bulb causing the problem. You will note that there appears to be light shining down the pipe yet the bulb is behind the opening. If I remove the bulb the light disapears. I have checked the texture and it has no transparency. The pipe work was created in the spline editor. The over head insert shows the pipe work and the bulb. Any ideas on what I could be missing so I can get rid of the light in the pipe work and still have the fill light. It is not reflection from the terrain as I have deleted that and still the light is in the pipe. thanks Neil