Changelog

[2018.2 undecided]

Add stripper of shader variant when building a player. Save shader compile time.
Disable per-object culling that was executed in C++ in HD whereas it was not used (Optimization)
Enable texture streaming debugging (was not working before 2018.2)

Configure the volumetric lighting code path to be on by default
Trigger a build exception when trying to build an unsupported platform
Introduce the VolumetricLightingController component, which can (and should) be placed on the camera, and allows one to control the near and the far plane of the V-Buffer (volumetric "froxel" buffer) along with the depth distribution (from logarithmic to linear)

Remove Resource folder of PreIntegratedFGD and add the resource to RenderPipeline Asset
Default number of planar reflection change from 4 to 2

Fix ConvertPhysicalLightIntensityToLightIntensity() function used when creating light from script to match HDLightEditor behavior
Fix numerical issues with the default value of mean free path of volumetric fog
Fix the bug preventing decals from coexisting with density volumes

Screen Space Refraction projection model (Proxy raycasting, HiZ raymarching)
Screen Space Refraction settings as volume component
Added buffered frame history per camera
Port Global Density Volumes to the Interpolation Volume System.
Optimize ImportanceSampleLambert() to not require the tangent frame.
Generalize SampleVBuffer() to handle different sampling and reconstruction methods.
Improve the quality of volumetric lighting reprojection.
Optimize Morton Order code in the Subsurface Scattering pass.
Planar Reflection Probe support roughness (gaussian convolution of captured probe)
Use an atlas instead of a texture array for cluster transparent decals
Add a debug view to visualize the decal atlas
Only store decal textures to atlas if decal is visible, debounce out of memory decal atlas warning.
Add manipulator gizmo on decal to improve authoring workflow
Add a minimal StackLit material (work in progress, this version can be used as template to add new material)

EnableShadowMask in FrameSettings (But shadowMaskSupport still disable by default)
Forced Planar Probe update modes to (Realtime, Every Update, Mirror Camera)
Removed Planar Probe mirror plane position and normal fields in inspector, always display mirror plane and normal gizmos
Screen Space Refraction proxy model uses the proxy of the first environment light (Reflection probe/Planar probe) or the sky
Moved RTHandle static methods to RTHandles
Renamed RTHandle to RTHandleSystem.RTHandle
Move code for PreIntegratedFDG (Lit.shader) into its dedicated folder to be share with other material
Move code for LTCArea (Lit.shader) into its dedicated folder to be share with other material

Fix fog flags in scene view is now taken into account
Fix sky in preview windows that were disappearing after a load of a new level
Fix numerical issues in IntersectRayAABB().
Fix alpha blending of volumetric lighting with transparent objects.
Fix the near plane of the V-Buffer causing out-of-bounds look-ups in the clustered data structure.
Depth and color pyramid are properly computed and sampled when the camera renders inside a viewport of a RTHandle.
Fix decal atlas debug view to work correctly when shadow atlas view is also enabled

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