New Option For Palette Shader

[Pixel Eater]

I would like to suggest a third option for the palette shader (alongside Palette Exponent & Palette Order) that chooses to only add the colour value of the shader to the scene. It combines the true-colour renderer's lack of banding with the colour tones of the software version.
In this picture you can see that the combined pane has no banding and captures the Doom accurate palette.

shader-demo.png

You can also notice that the floor colour within both of the second panes is less faded than the true-colour version.