I have been analyzing the whole day, should I use vertex paint or a texture atlas to paint all my models in blender for my diploma thesis I am currently working on (procedural generation of a city made in low poly (painting faces with solid colors)), when I finally decided to go with vertex paint after all, because it might be a better option due to slight optimization reasons (no textures needed).
When finally I start painting my models, when I realize I can't find any way to simply repaint already colored faces with slightly different hue of color. Nothing pops up on google. Please, if anybody knows how (if) this is achievable, please help me out.
This is an example what I will be painting. I have already painted a lot of my objects using multiple materials (a while ago, when i did not know about draw calls so much), so I have all the materials assigned with colors I want on my objects, maybe UV texturing is the way to go, because I can somehow select the faces with already assigned material and just drop them on appropriate color in texture?
I have gone to UV mapping due to the reason it seems way faster to alter color of already colored faces rather than using vertex paint. See the work in progress below.