Fix light atten and transmittance calcs breaking ambient color contrib to fog.

Needs to be tested on DRTSIM-415 or better to get legacy viewer settings that match EEP.

Tweak application of ambient in deferred soften light for class1/2

Make disables for parts of lighting not persist (too many weird bugs if people leave these enabled and forget).

Make materials apply vertex color to both linear and srgb versions of diffuse color.

Fix handling of ambient (was getting reset to 1,1,1,1 unintentionally).

Modify shaders to balance ambient across render modes again.

Make shadow alpha mask shader ignore vert alpha (if it mattered, it'd be blended anyway).

Modify deferred fullbrightF to use same handling of alpha masking as shadows for consistency (esp when mask cutoff == 0).

Limit banding from atmo exp falloff calc.

Put back atten for non-ALM lighting that accounts for inverted lin atten setup of yore.

Soften assert on non-finite data in LLCoordFrame until we can isolate conditions to repro the assert.

Modify ambient handling and forward projector lighting again to stamp out alpha fires.

Make tex cache not check size logic while performing validation.

Fix underwater water fog density modifier being used when not underwater.

Make underwater modifier not applied when not underwater.

Modify forward projector lighting to use falloff like the deferred lights.

Make tex cache not evaluate evictions for size during validation passes.

SL-11279 and SL-11273 fixes

SL-11273 FIXED [EEP] The beacon checkboxes in the Day Cycle window can only be changed while a keyframe is selected.

Tamp down more view-dependent refraction map fail.

Undo attenuation hacks and balance with deferred path projector lighting.

(engages AMBIENT_KILL, SUNLIGHT_KILL, and LOCAL_LIGHT_KILL defines in shaders to accomplish
  those tasks as required by each render mode).

Make terrain underwater shader not try to light said terrain.

Fix colorspace of reflected color in non-ALM shading.

Tweak transparency of water further.

Fix linear attenuation on forward projector lighting.

Revert setup of falloff to prev code.

Revert deferred water spec and tweak refl/refr blend.

Fix ambient light inputs to the renderer.

Fix 3rd sky shader w/ mistaken density mod conversion.

Make ambient clamp apply to all modes.

Tune ALM ambient clamp to match non-ALM.

SL-10625

Revert perf optimization to not wait for occlusion queries until there's a good chance they're complete
because Intel HD driver versions between 6471 and 6577 are broken and hang forever (6709 and 6861 are fixed).

SL-11220

Fix transport when no_atmo == 1 (HUD rendering) was in play.

SL-11112