Unity Issue Tracker - Grabpass does not work when the Render Target is set to Camera and specific Viewport values are set (0,0.5,0.5,0.5)

Fixed

Fixed in 2022.3.70f1, 6000.0.64f1, 6000.2.15f1, 6000.3.1f1, 6000.4.0a6, 6000.5.0a1

Votes

1

Found in

2021.3.54f1

2022.3.64f1

6000.0.54f1

6000.1.13f1

6000.2.0b12

6000.3.0a3

6000.5.0a1

Issue ID

UUM-113033

Regression

No

Grabpass does not work when the Render Target is set to Camera and specific Viewport values are set (0,0.5,0.5,0.5)

-

Jul 29, 2025

Reproduction steps:
1. Open the attached “IN-110055.zip” project
2. Open the “SampleScene”
3. Enter Play mode
4. Observe the Game view

Expected result: The Render Target is correctly displayed on the RawImage
Actual result: The Render Target is not visible/displayed on the RawImage

Reproducible with: 2021.3.54f1, 2022.3.64f1, 6000.0.54f1, 6000.1.13f1, 6000.2.0b12, 6000.3.0a3

Reproducible on: Windows 11, Windows 10
Not reproducible on: No other environment tested

Notes:
- It appears that the wrong “Y” value is used when calling CopySubresourceRegion()
- Does not reproduce with OpenGL Graphics API
- The issue can be bypassed on DirectX by setting the Viewport value to (0,0.25,0.5,0.5) instead
- Also reproducible in the Player

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