New pipeline overview
=====================

Organized by RTTs
-----------------

To color:
	- initialize the glow representations (no rendering yet)
	- render the 3d skybox, if any (includes the usual skybox)

To the MRT (color, normals, depth):
	- solids

To quarter1:
	- glowmap

To various shadow maps:
	- shadows

To tmp1:
	- lights

To color:
	- lights from tmp1 are multiplicatively blended
	- skybox if there is no 3d skybox
	- lens flare/god rays occlusion query (no rendering)
	- solid post-processing
	- transparents

To displace:
	- displacing nodes, if any

To the screen:
	- the post-processing chain
	- GUI


Organized by passes
-------------------

Init:		glow init -> 3d skybox
Main:		solids -> glows -> shadows -> lights -> occlusion query -> solid PP
Transparent:	transparents -> displacing -> PP
GUI:		gui