Shader fix: Texture mix of colors

Finally got the shader to work the way I expected. There's still room for some tweaking though. The colors expand from the place the mouse hovers over and the colors that collide mix with each other using mixbox, which makes use of the Kubelka-Munk Lerp developed by a team of researchers. Now I'm going to make use of this in a small demo game, I decided that making an app was not the best way to showcase this shader.