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Fixed in 2017.3.0f3

Fixed in 2017.1, 2017.2

Votes

0

Found in

5.6.1p1

Issue ID

941966

Regression

No

[MotionVectors] z-bias applied to motion vectors reduces precision

Post Processing

-

z-bias is applied to motion vectors to match the z-bias required for precision loss when multiplying matrices for dynamic batching. This reduces precision in motion vectors even when dynamic batching is disabled.

Repro steps:
1) Open project and scene "Repro"
2) Enter play mode (motion vector debug is enabled)
3) Notice how the motion vectors are "leaking" through the front cube

Actual result: Motion vectors are "leaking" through the front cube
Expected result: Motion vectors do not leak

This is fixed by this PR: https://ono.unity3d.com/unity/unity/pull-request/50387/_/graphics/motion-vectors-precision-fix
Fix is tested and confirmed against this repro in trunk

Reproduces in 5.6+

Comments (1)

  1. B67a5e46c70a5857d9a57c7e6c3be787?d=mm

    SmShadows

    Aug 01, 2018 19:34

    I still have the motion vector issue bleeding trough walls on all 2017 versions I tried (even in 2017.3.0f3).

    This is sad that such an obvious bug is still present. Object behind walls are casting motions blur from behind walls, and TAA is unusable, I have seen that bug in a couple of shipped unity games. This makes motions vectors useless, and it has been like that for years.

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