Hi, I've been trying to add shadow casting lights to my plugin and every time I put one in it shows the red error around the bulb and gives off no light in the render window, yet in game they work. So just to check I loaded up just the Skyrim esm and found a shadow caster in Whiterun, which showed as purple being normal. Though with my plugin loaded that same light in Whiterun was giving the red error. So i'm pretty confused at this point of what is going on. Any help would be appreciated.

There is a course that may be helpful to you: http://tesalliance.org/forums/index.php?/topic/6843-ck-basics-lesson-4/