- Feature can be activated in the Experimental section of the Editor Settings
- Replace Texture2D/TextureCube resources by placeholders until their PlatformData is ready
- Add a utility class allowing to encapsulate raw field pointers without breaking compatibility
- Protect PlatformData from unsafe access through encapsulation.
- Protect texture's resource from race conditions between game and render threads through encapsulation.
- This allows to get rid of FlushRenderingCommands and long game-thread stutters when Updating a texture's resource.
- UpdateResource was never safe to call without a FlushRenderingCommands and multiple call-site are doing exactly that, this will fix those cases.
- Those were probably undetected due to their low occurence rate under normal conditions but can easily be reproed during async texture compilation on 32 cores.
- Force wait on required texture compilations for MaterialBaking, ProxyMesh, Thumbnail generation for disk usage
- Wait on all textures compilation whenever a wait for all shaders compilation is requested for safety (i.e. screenshot)
- Compile UI and heightmap textures with higher priority to reduce visual artefacts
- Increase priority of texture that have been rendered to improve time-to-usefulness of the editor under low core count
- Async compilation is disabled for -game / non-editor mode as there is currently no support for async bulk data loading from external files
- Properly cancel async tasks when UTexture is garbage collected before the compilation is finished
- Show progress when explicitly waiting on compilation
- Changing the mip settings in the texture editor (or any settings requiring the running platform data to be recomputed) will now be processed asynchronously.
DEBUGGING
- Can be forcibly enabled/disabled through command-line via -asynctexturecompilation=[off, on, paused]
- Can pause texture compilation using Editor.AsyncTextureCompilation = 2 or -asynctexturecompilation=paused
- Can manually resume a specified amount of paused compilation using Editor.AsyncTextureCompilationResume [Num]
- Can forcibly wait on all compilation using Editor.AsyncTextureCompilationFlushAll
BENCHMARKS
- 3m15s to 1m20s when loading Apollo_Terrain with no textures in DDC (AMD TR 3970X)
- 6m45s to 1m11s when loading Apollo_Terrain with no textures in DDC (-corelimit=8)
- 3m10s to 1m54s when lauching PIE on Apollo_Terrain with no textures in DDC (AMD TR 3970X)
- 7m43s to 1m36s when lauching PIE on Apollo_Terrain with no textures in DDC (-corelimit=8)
- 0m57s to 0m42s when importing Attic_NVIDIA.usd with no textures in DDC (AMD TR 3970X)
- 2m14s to 0m35s when importing Attic_NVIDIA.usd with no textures in DDC (-corelimit=4)
TESTS
- Success on all material baking tests from EngineTests with -asynctexturecompilation=paused
- Runned with -corelimit=1 all the way to unlimited
- Cooking worked
- Opening the texture editor/material editor will force the compilation to finish like expected.
- Changing a setting in the texture editor will recompile async, even allowing to close the editor and continue doing other changes.
- Unpausing the compilation will update the texture thumbnails properly.
- Started with -asynctexturecompilation=paused, and then unpaused after a map loading, and then into a PIE session to stresstest UpdateResources.
- Tested both dx11/dx12
- Vulkan fails on Fortnite even with -asynctexturecompilation=off because of Landscape weigthmap, not this CL.
- Compiled and tested FortniteGame / UE4 / ShooterGame projects
#rb Uriel.Doyon, Francis.Hurteau
[CL 13694814 by danny couture in ue5-main branch]
#rnx
#rb none
#ROBOMERGE-SOURCE: CL 10869241 via CL 10869527 via CL 10869904
#ROBOMERGE-BOT: (v613-10869866)
[CL 10870586 by ryan durand in Main branch]
This allows us to put texture layers into physical groups that will be accessed through the same page table layer (and so must share the same UV in different physical textures).
Physical spaces can now contain multiple texture layers (one for each member of a physical group).
Changed the logic for the physical space pool descriptions so that we can support multiple texture layers. And also made the description work for Min and Max tile size values so that we don't need to specify pool sizes multiple times for each possible tile size.
Runtime virtual texture can select if it wants to use a single physical group. By default this is on so that RVT uses a single page table channel.
#rb none
[FYI] Ben.Ingram
#ROBOMERGE-OWNER: jeremy.moore
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 8747955 via CL 8748343 via CL 8782324
#ROBOMERGE-BOT: (v422-8689730)
[CL 8790675 by jeremy moore in Main branch]
Added 2 new texture filter modes : TF_FirstMipNearest and TF_FirstMipBilinear. Those always sample the first (highest) mip.
When running with cooked content, TF_FirstMipNearest and TF_FirstMipBilinear will drop the all mips but the first (freeing mip tail memory).
In uncooked game, the visuals will be valid but memory of the mip trail is still allocated.
In the editor, the mip tail can still be visualized.
Fixed the texture editor streaming method description to actually reflect the state of the texture.
#rb nick.darnell
#ROBOMERGE-SOURCE: CL 4985873 via CL 4987451
[CL 4990180 by uriel doyon in Main branch]
