Here, random textures x random gamma. You will need to reload the textures, and it probably needs some tweaking to get the desired result. You can also use this to get other variation than gamma (change operation in Corona Mix). Min and max gamma is set by changing the colors in the upper slot of Corona Mix. First one is a plain color, and the other one is a Corona Color to get something brighter than bright (since RGB255 is just the original gamma). Hope it's useful.
