seachnasaigh once again a big thanks. Think I'm slowly getting closer to understanding how this all works. Especially the IDL side of it. Also see why you need to use roundish shapes as well to form the lights shape. Didn't realise IDL was needed for this to work, but after seeing your "box" arrangement I remember when P8 was released. In some of SM's P8 promos they used the set I created for that and I remember how that was lit using IDL only. In simplistic terms by 'bouncing' 'light' off things, hence the need for the 'box' to bounce off. So I've gone back to basics a bit here and started regigged the set a little. Instead of creating a 4 walled one, I've 'lost' a wall. Which didn't have much lighting anyway. Piccy (roof nobbled for reference - it will have one). Basically added some auras and emitters, as on the roof. 1 wall left to go so when thats done (be in the next few days) then I'll upload it so you can have a play with it. PS - just seen your second post. Maybe its the time here but I'm not sure what you mean by double edge blend method. Transmapping I get.

Pinky - you left the lens cap of your mind on again.