oupse I've mixed [pix_threshold] and [pix_alpha]
it's about pix_alpha rather but I think you've understood,
indeed I'd like the particle reveals background image
the idea is about snaping the particle system over a black rectangle (the mask)
and then turning the white pixels to alpha for revelating the (purple) rectangle that should be rendered first
i've attached again the same patch but with [gemhead 5] instead of [gemhead 0]
+++
----- "Jack" jack@rybn.org a écrit :
order rendering' because [gemwin 0] <=> [gemwin 50]. If I understand, you want to see a background image when the particles are drawn ? ++
Jack