When using a UserSceneTexture in a post-process material, a visible rendering issue occurs if the viewport's ScreenPercentage is set to below 100. This issue looks like it might stem from an incorrectly sized buffer, which may be be sized based on the reduced screen percentage rather than the full resolution. To note, if the ScreenPercentage is increased to 100 or higher, and then reduces again, the rendering issue is no longer visible.
1 Create a post-process material that writes to a UserSceneTexture.
2. Create a post-process material that then reads from that UserSceneTexture.
3. Apply both these materials to a post process volume.
4. Open the Editor viewport, with the ScreenPercentage set to less than 100.
5. Observe the rendering issue, where the screen is stretched based on the defined ScreenPercentage.
6. Increase the ScreenPercentage to 100 or higher.
7. Reduce the ScreenPercentage back below 100. Note that the rendering issue no longer occurs after increasing and decreasing the value.
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-234814 in the post.
| 6 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 5.5.1, 5.5 |
| Created | Dec 17, 2024 |
|---|---|
| Updated | Dec 18, 2024 |