Title says all, I want to know if this is possible to do in the game. The image needs to be adjusted in 2D material type, also I need a specific part of the image not to be affected by color changes.

Okay, that question was pretty hard to answer, so I have another idea, I need to know where is the corona's main function, is it possible to clone it to make another type of corona?, I know there is a corona "function" inside of codwaw.def, but where is the code that indicates the image to use and stuff like that?