LÖVE

Hello,

I'm searching to know (if it's possible) how draw multiple form with semi-transparent color without additive at all. .

I tried with setColorMode() and setBlendMode() but without success as you can see at this sample : Somebody has a idea ?

I also totally want that, so if someone knows how to do it, I'll include it in the next version.

You could draw two circles on a render target without additive mode, and then draw a square with that texture and additive mode on the backbuffer ...
(I think a render target is called a framebuffer in opengl)

Clever, but will have to wait a while for that. 8-)

Stencil buffers could also be used for that: every render operation would write into a stencil buffer, and new fragments only get rendered where the stencil buffer has not been set yet.