MSAA Antialiasing

[vorg]

Even if MSAA FBO is supported in pex-context pex-gl/pex-context#115 we will still have issue with HDR as currently tonemapping is done after rendering to texture. As MSAA doesn't work properly with HDR values the actual order of operations should be:

render scene -> tonemap -> msaa resolve -> inverse tonemap -> e.g. hdr bloom -> draw to screen

More info about inverse tonemapping
HDR inverse tone mapping MSAA resolve
A Quick Overview of MSAA
Tone mapping