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Fixed in 7.2.0

Votes

0

Found in [Package]

4.10.0 - 8.0.0

Issue ID

1213914

Regression

No

Objects are not cleared from the MotionVectors buffer when they are using Default HDRP material

Package: Scriptable Render Pipeline HD

-

How to reproduce:
1. Open the attached project named "Case_1213914"
2. Open the Sample Scene
3. Enter Play mode
4. Open Window -> RenderPipeline -> Render Pipeline Debug
5. In the Rendering tab set Fullscreen Debug Mode to MotionVectors
6. Move the cube and observe the Game view

Expected result: Motion vectors disappear after the cube stops moving (Track_1213914_V2)
Actual result: Motion vectors are not cleared when the cube is stationary(Track_1213914_V1)

Reproducible with: 2018.4.16f1, 2019.2.19f1, 2019.3.0f5, 2020.1.0a20
Could not test with: 2017.4.36f1(HDRP was not available)

Package versions tested: 4.10.0, 6.9.2, 8.0.0

Workaround: Open the Material in the Inspector window and reset the used shader

Notes:
1. Only reproducible with the default HDRP material. Changing the Shader used by the said material fixes the issue. Selecting the same shader again seems to fix the issue as well
2. Graphics APIs tested: D3D11, D3D12, Vulkan

  1. Resolution Note (fix version 7.2.0):

    Fix should be included in the upcoming HDRP 8.0.0

  2. Resolution Note (fix version 7.2.0):

    The issue is resolved in HDRP 7.2.0 which should be available in Unity 2019.3.0f6 and above

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