I was planning to develop a new blending method for my own needs – very similar to the MULTIPLY blend mode, but setting alpha to [tt]A.alpha*B.alpha[/tt].
But by looking at the code I saw that:
BLEND_ALPHA_OVER=19, //!< \deprecated multiply alphas and then straight blends using the amount
This feels like referring to something similar to what I had in mind. But – as a SynfigStudio 1.0.2 user – I don’t understand exactly what this comment is talking about.
Any clue or pointer would be welcome;)