Remove all references to unused shader var global_gamma.
Remove many unused decls for gamma from shaders.
Make post-deferred gamma correction use display_gamma.
Make setting display_gamma use the correct RenderDeferredDisplayGamma setting.
Make vograss objects set their face vert/index counts to 0 when setting
the number of blades to 0 to disable rendering so we don't allocate space
and then skip setting it up with actual index data in getGeometry.
Make fullbright rigged objects with alpha mode none use fullbright shader instead of incorrectly using the material shader.
Increase effect of variance in cloud shaders.
Make shadowAlphaMask shader ignore vertex alpha before discards iff we're a fullbright object.
Keep llappearance from stuffing dangling pointers into the alpha cache (crash iff you're using nSight debugging and disable readbacks).
Fix glow calcs in sky shaders (not just the not shared enough atmospherics funcs).
Revert 10625 attempted fix as it breaks baggy clothes as much as skipping readbacks does.
Keep texture baking from pointlessly mercy flushing GL like a kid that just discovered the toilet handle.
Make glReadPixels call use GL_ALPHA8 (a texture format) instead of GL_ALPHA (an enum to indicate the alpha channel).
Make sun additive contribition depend on facing the sun (without breaking fog).
Put back scaling factor keeping sun contrib from blowing out with new FS param range for glow.
Move dynamic texture update (which does local back readback work) to just before swap
which may keep the Intel driver from tripping on its own shoelaces and is also subjectively faster for bakes.
Fix materialF including debug force to linear color and re-add logic
to stomp emissiveness when normals are not present unless explicitly requested via diffuse alpha mode.
Fix emissives without normal maps clobbering the alpha output in materialF.
Modify glow size calc to get close to pre-EEP sun glow behavior (may require sky vert settings >= mid).
Make bake ignore alpha readback for Intel until we can determine why their drivers now go boom.
Try aligning data used for glReadPixels to see if we can coax the Intel driver stack into being a less souciant pile of detritus.
Replace face color based test replaced with other logic in error.
Remove update threshold logic causing hiccups and rework sky updates.
Make deferred water do double transport again to match non-ALM rendering more closely.
Graham Linden