My rendering engine is whatever comes with AutoCAD 2010.
I was using (2) point lights in each fixture with 850cd of power in each individual light. The only way I was able to get anything not directly under the lights was to apply an illuminated material to it, hence the ceiling looking how it does. This is my first time playing with lighting when I used 3d before it was only for a small project that never got close to this leve.
Don't even want to start on the new hardware conversation. I have had 5 computers at my job and have only been here a little over a year. None have meet AutoCAD's min specs. and I'm trying hard to get them to spring for a system that is meant for 3d work.