Make parts of a building "light up."

[Xegethra]

Hello,

 

I have been making some edits to the buildings in GTA 3 with the dragon dff plugin for Blender. But I am having trouble with having some parts of the building lighter than others to give the impression the neons and signs and whatnot are on. I notice in the object properties dragon dff has a few export options. I notice if I export as is, the whole building will light up...not noticeable too much in the day but at night the whole place is bright, which looks off because it is. I have found that by disabling the vertex colours the building goes dark, in MEd the building now looks like the surrounding vanilla ones at night...dark. OK good...but not for the signage! I don't know how to make the parts I want to light up do so while the rest stays dark. I don't care if this means the lights are on all day, just so long as the building as a whole isn't bright at all.

This image will try to explain it.

Edited December 22, 2022 by Xegethra