Setup for a studio environment:
-created a surface for the floor, background and ceiling
- "light-walls" left and right ( the red and green shapes)
-apply area light or glow material to both, with diffrent intense ( 100% / 50% )
- a top light that is reflected by the ceiling ( the yellow shape)
-turn off all other lights ( Ambient, Flashbull, Solar, Skydome)
here you can find the dgn