Is this just after adding the light, or are you trying to render? There shouldn't be a problem, since each light is only 1 distance light, but, like the others said, there may be a problem with your video card and/or Open GL settings. Also, just as an aside, I've found, personally, that the OpenGL renders don't work very well for shadows, and, that's basically what those light sets are designed for. I hope you get this fixed. I know you've been having a lot of frustration around the program :(

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