How does one go about making colours additive in the graphics context?
That is to say if I were to layer up a three identical strokes, eg red, green, and blue, all with alpha = 1, I would expect, and do get, the top colour to be the only one you see. This is totally appropriate for Over compositing.
However, if one were to use Additive compositing the result would be white, as in red + green + blue. And this visual result would be the same irrespective of layer order.
It would be great to be able to switch g.setCompositingMode between standard Over, and Additive for, glows, overlays, and other niceties. Sometimes it might be appropriate to combine and express all your visual data in this way for say a multi band eq display or something.
I did see the vf layer effects thing from 9 years ago. It seems like it could be outdated though, and also perhaps overkill for what I’m considering.
Any thoughts or suggestions are much appreciated!