Like the title says... How do I modify doodad lighting? How do I increase or decrease the amount of light a unit or doodad has? How do I put lighting on a unit or doodad? Can you change the tint of the light?
If you have a 3dmodeling program (3dmax 5.0 with blizzard art tools; or blender with a user made plugin) you can create or modify wc3 default lighting.
However, you can not change wc3 shader, so applying it to invidual objects is out of the question as far as I know.
But you can tinker with lighting, it's direction, it's tint, and intensity. I'm not sure about blender, but make sure the light option "Enviroment" is set to true in 3dmax.
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.