<https://forums.getpaint.net/topic/17805-tool-plugins/#comment-306400>
<http://schema.org/text>
"I think i somewhat understand the second paper. \nyou have the L in HSL and the H and S only on some part of the picture \n1) you take the gradients out of the L layer \n2) then you fill out the blanks on other layers such that: everything is smooth, and the gradients on these layers are as close as possible as those on the L layers. \nI don't know if i missed something in the big picture. \nI don't think i could implement that one though. \nI understand nothing about partial differential equations, \"poisson\" is only the french for \"fish\" for me, and i can't imagine a fish equation or a fish solver! lol  "
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