I have a pretty annoying issue when it comes to large, indoor BSP's and lighting. For some reason, when running lightmaps, Halo likes to think that I have no ceiling, so the light just bleeds in through the top. I've tried adding more portals and such, but It hasn't really helped that much, if at all. However, the gltich does not effect the lighting of the ceiling, as it seems to be lighted correctly... just not calculated for the rest of the geometry that its actually there. With smaller parts of maps I do not have this issue. Any help would be most appreciated.