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Fixed in Unity 2017.3



Found in


Issue ID




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

Post Processing



Priority: 7Not yet prioritized for a release


Severity: 3Workaround is possible

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:
Fix is tested and confirmed against this repro in trunk

Reproduces in 5.6+

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