[10.x.x] Backport of URP late latching support to reduce VR latency to 10.x #5440
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…w late latching command buffer commands to mark/unmark URP stereo matrices such as stereo view and projection matrices for use in late latching.
…s/Graphics into 10.x.x/universal/xr/late-latching
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amaestas13
approved these changes
Aug 26, 2021
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Tested on
Version: 2020.3.18f1.952
Revision: 2020.3/staging 540b558b75fa
Built: Wed, 25 Aug 2021 14:29:50 GMT
Ran Functional Testing to verify no regressions. Tested previously with editor pr , retested now that that has landed. Verified supported versioning.
phi-lira
approved these changes
Aug 27, 2021
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Purpose of this PR
Backport of changes from [Universal][XR] Reducing VR latency with Late Latching #4807
Late Latching can potentially reduce ~15 ms of rendering latency (on Quest) by resampling HMD and controller input poses right before the final submit of command buffers to GPU (see doc below).
Add late latching support for camera and render pass. Use new late latching command buffer commands to mark/unmark URP stereo matrices such as stereo view and projection matrices for use in late latching.
For a detailed late latching overview, please see design doc:
Testing status
Tested late latching on Quest using template scene.
Comments to reviewers
Matching 2020.3 PR (landed in 2020.3.18f): https://ono.unity3d.com/unity/unity/pull-request/130337/_/2020.3/xr/late-latching-urp