Re: [Gimp-user] Layer addition - bug, feature, or user misunderstanding?

I probably never would have noticed anything odd about Addition blend 
mode, except I was working with a channel layer stack from a color image 
where I already knew what the result of adding the layers *should* look 
like. But the highlights were subtly wrong, which is why I asked on the 
list whether maybe Addition blend mode was supposed to do something 
different from what I thought it did. And I'm glad I asked - your 
mathematical explanation of how layer opacities work is excellent, very 
clear. That information should go in the GIMP documentation somewhere, 
if it isn't already there.


Yeah, I probably would never have encountered this "in the wild" either because layer opacity isn't something 
I use very often, and the clamping action is moot at 100% opacity.

-- Stratadrake
strata_ranger hotmail com
Numbers may not lie, but neither do they tell the whole truth.


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