I had another idea i was thinking on instead of having a multiple point lighting editor like the old KPT i mentioned some time ago.
I was thinking about Image Based Lighting/HDRI.
Ambient Lighting from multiple directions while painting and less clutter for the UI as well verses the KPT-Point Lights Sphere idea.
This might be facinating for those who might want the art work to look like as if it were painted in any given realistic environment like a forest on a bright day for example. Take a .exr image of the bright daylight forest into Art Rage in the paper settings window and the oil paints for example would look as if it was lit in a bright daylight forest setting which would replace the one direction shadow information that is common place in Art Rage right now although i am not sure if it being in the paper settings window would work?
The imported .exr file lighting data would feed directly to any of the paint tools with lighting and shadow information.
Gamma settings might be something to consider for the HDRI Lighting also.
I modified the UI to see how this may look if it were implemented somehow... i hope it is OK that i did this? :?