"Don" wrote in message
SNIP
BTW, thanks for replying! Nobody else seems to care
for these equations… 🙂
Most of the modes missing from your function list are more creative than scientifically relevant. It may therefore be less obvious to find them spelled out. Their functionality is described in the help file, but you’ll have to convert it into a mathematical function yourself, unless someone does step forward with the answers.
I find it easier to appreciate the creative effects of some of these functions by layering 2 linear RGB gradients at 90 degree angles. Using an image size of 256×256 pixels, and making sure the gradients are non-dithered and absolutely linear, will provide all possible 8-bit channel combinations possible with blending. You’ll see that many blends result in non-linear results, so it may be a bit hard to grasp the actual underlying function. Multiplication and division will result in clipping, and many modes use the RGB values as transparency masks where 0=0.0 and 255=1.0 or the reciprocal of it, or with 128 as 0.0 and ranging from -1.0 to 1.0.
All said and done, if you do find the mathematical foundations, I’m sure there will be some that will appreciate to learn from your findings, so feedback is of course welcome…
Bart
