i get a little confusing with premultiplied and nonpremultiplied alpha channels.
i want to render single layer for a flash application.
i have a background and a lightcone.
the lightcone has no alpha. so i made a reorder node rgbr.
when i render out the layer i guess the alpha is premultiplied. but im not sure if flash can handle them. because when i import the footage in after effects i have a heavy shrinked alpha channel. when i set the alpha to premultiplie i get my normal soft edges. but the hue is gone.
ok i would say the flash guy could give them a color. but i want to understand the technical thing behind it.