Items image constructor

[Hermesiss]

Implement method

Texture2D CreateTexture(Texture2D original, 
    Color baseColor, 
    Color additionalColor, 
    Color effectColor);

Use R channel as monochrome background, G and B channels as masks for additionalColor and effectColor accordingly.
A without changes.
Mask for baseColor is A exclude G and B.
Place colors on background using Multiply mode

Example colors: #c5c5c5 #ff0000 #5eff00

Masked image (download and use for testing):

Masks (R G B A):

Processed image: