sounds like changing it is a bit beyond my level of expertise then. cheers for the info. any idea if you can set priority for which lights to keep running? so for example, if i enter a scene with four dynamic lights and whip out my torch, one of the other lights in the room goes out and the torch is always lit. it seems also that when there are too many dynamic lights, instead of just turning off the shadows they cast, the engine turns the lights off altogether. Could it not just replace those lights with non shadow casting ones whilst the conflict has occurred? Edit: what about determining which lights are dynamic based on light radius or brightness? or is that just too much coding here for one amateur to do?