Am I missing something, I add lights to an interior and they don't cast their light unless I move the tile they are near. I try turning lighting on and off and it doesn't help.

Also, if I move the tile to get the light to show then I adjust the light at all, scale it, move it, etc it disappears again until I move the tile.

Press F5 to refresh the preview window.

Thanks that helps, I hadn't thought you needed to refresh it as I had seen some tutorials before where it refreshed on its own.

It's a bug in the GECK.

Annoying, I know.