Editing Brighter Shores:Color masking (section)

==Example==
The process for color masking can be seen by its inputs and outputs, but the exact algorithm is not known. We can make approximations based on the resulting images that we see. Here is an example for [[Coarse Hickory Post]], [[Coarse Oak Post]], and [[Coarse Pine Post]]. Each type of item starts off with two images: a base image, also called a texture, and a colour mask:

{|
|[[File:Coarse Post Texture.png]]
|[[File:Coarse Post Mask.png]]
|[[File:Coarse Hickory Post.png]]
|[[File:Coarse Oak Post.png]]
|[[File:Coarse Pine Post.png]]
|-
|The texture
|The mask
|The Hickory result
|The Oak result
|The Pine result
|}

The texture image shows the detail of the item. Note that while the texture is not grayscale image ''everwhere'', it ''is'' grayscale in the areas that correspond to the mask. For these posts, that is the whole image, but for Armor dyes, there is color on the non-mask sections of the image.

The mask image shows the areas where the color is to be applied. It is also monochrome, but usually not grayscale. In this example it is monochrome red, as there is only one mask to be applied. Some images, most noteable potion Preparations, have a two-color mask with a Red area and a Green area, to show two different areas which get different colors applied to them, for the two ingredients of the preparation.

For each pixel in the two input images, there are only two values: the grayscale value of the texture image, <math>K</math>, and the red value of the mask image, <math>M</math>.

The output image has a full colour for each of these pixels, so it has a red value, <math>R</math>, a green value, <math>G</math>, and a blue value, <math>B</math>.

There exists some color transform functions:
:<math>R = f_R (K,M)</math>
:<math>G = f_G (K,M)</math>
:<math>B = f_B (K,M)</math>
To convert the input to the output. It is important to know that '''there is no cache data for what these functions are'''.