I’ve noticed that when using Straight Alpha, the edges are not rendered to eliminate undesired fringing. For instance, when I rendered some torch flames with 0.56 using Straight Alpha, I get the desired result, which looks like so:
I do not seem to get this necessary correction when I do the same with 0.75.
I don’t think the fringing made it into 0.7.5, but in the render node, ther is the ability to set a background color for each export type which will do the same thing for you as the fringes.
I’ll try adjusting the background color to see if I can mitigate the problem. I really hope the correct straight alpha rendering is patched in soon, though, because it’s the only way to have pixel-accurate color edges on the sprites, especially ones which are more complex fire/smoke mixes.