>>7639028
>subtract is basically meant to emulate how real-world illumination and paint mixing works
Nah, not even close, multiply is closer to how paint blends. Subtract means you literally subtract that color, like if you paint a red stroke on white, it will make cyan, because (1,1,1) - (1,0,0) = (0,1,1). Because colors are expressed as fractions, multiply acts kind of like a weighted average.
>specific tone they want to use for multiply/subtract shading
Do your shading in black and white and treat every material as white, multiplying colors on top will give you the correct tone (minus highlights and reflections). 100% red multiplied on 50% grey will give you 50% red. If your scene is lit with a blue light, just throw in a big blue fill on multiply and all your colors will be accurate. Personally, I don't like to use blending modes except in editing/finalization and maybe mixing a palette. They make it really hard to keep edge and shape control. But for things where that doesn't matter it can help speed things up and keep consistency. Keeping it on normal is perfectly valid too.
>pin light
Pin light is like overlay but instead of swapping between multiply and screen, it swaps between lighten and darken. Works well as an overexposure effect I guess. (picrel)
Most of these are for editing photos and doing effects stuff.
