How do I Make Color Customization?

Hello, I'm making a shooter 3D and I want to make a customization system for the weapons, but how to do it? I think multiple texture maps premade to be I aplied on the object isn't the best way, since many games that use it has a vast variety of color and texture choices, patters (that can be colored as well), multiple colors for the same weapon, It would be very complicated to draw handly draw all the possible combinations and variations, and would create too many files to increase the storage the computer needs to run the game, being inefficient? Do someone knows how to do it the proper waw, and in a way I can paint different parts of the weapon with different color or some different drawing or anything tha has to be transposed to the gun?



Thanks;
Arthur

 

Make a custom shader that does mix / color your color maps
You can make a mask texture that define what part of the texture should be colored by what color adjustment. (One mask per channel R G B A)

 

How do I do that?