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Third Party Issue
Votes
0
Found in
6000.0.61f1
6000.2.10f1
6000.3.0b8
Issue ID
UUM-125089
Regression
No
Duplicate External Textures start appearing when a Texture created with "CreateExternalTexture" is modified causing Memory Usage spikes on VisionOS
How to reproduce:
1. Open the attached “IN-121810.zip” project
2. Switch the Platform to VisionOS (File → Build Settings → VisionOS → Switch Platform)
3. Build and Run the “Scenes/BasicScene” and run the App via Xcode
4. In Xcode, turn on the “Metal Debugger” (Product → Scheme → Edit Scheme → Options → GPU Frame Capture → Metal)
5. Run the Application on VisionOS and observe the Memory Debugger
5. Idle in the App for ~30 seconds
6. Observe the Memory Debugger in Xcode
Expected result: Texture Memory is stable
Actual result: Texture Memory significantly spikes, usage multiplies twice
Reproducible with: 2.4.2 (6000.0.61f1, 6000.2.10f1), 3.0.2 (6000.3.0b8)
Couldn’t Test with:
1.3.13 (2022.3.68f1) - AR Foundation Package unfixable errors due to downgrade
3.0.4 (6000.4.0a3) - Editor crashes when building, (not reproducible on new project)
Testing environment: macOS 26.0.1 (M3 Pro), Xcode 26.0.1
Reproducible on: Apple Vision Pro 2.6
Note: Reporter mentioned that the issue is reproduced using “CreateExternalTexture”, as soon as the textured is edited in any way, several more copies appear
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Resolution Note:
This is fundamentally an issue with the RealityKit API that we use to update textures (LowLevelTexture.replace). We will be ameliorating this by adding a PolySpatial API to mark a texture as "streaming," meaning that it will use the (DrawableQueue) path that we use for RenderTextures, which limits the number of extra copies. Apart from that, I would recommend raising the issue (being able to use an external texture directly in RealityKit, and/or reducing the number of extra texture copies created by LowLevelTexture.replace) with Apple via their Feedback Assistant.