FLAM3 Background color is not respected

[MAD-OVERLORD]

Lil' sickos like me, sometimes like to rape the beauty of flames by creating black ones, but with no other background color possible then black(with jpegs), this gets a bit too black, even for my taste.

Rendering transparent .png's and hacking some shit together with imagemagick is not an option on so many renderings and for some other reasons, so a fix would be welcome.