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Black square artifacts when using CameraFrame Bloom or DoF Post-Processing #7492

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@Christopher-Hayes

Description

@Christopher-Hayes

Description

When using either Bloom or Depth of Field (DoF), a black square flashes randomly on the screen. At certain places in my scene I can reliably cause these artifacts to show.

The strange thing is the 3D modeler I work with does not see these artifacts at all.

Another unusual thing is this happens with my much more powerful desktop, and does not happen on my laptop.

Related Forum post from another user: Artifacts with cameraFrame bloom

Screenshots

In-scene example

Image

Screenshots from Spector.js.

Previous frame New frame with the artifact
Image Image

On Discord, I've DM'd Martin the Spector.js save file shown in the screenshots above.

Reproducibility

Testing with a custom local-compiled engine I'm seeing this on the latest commit as of March 28, 2025.

I also went back as far as engine v2.3.1 (Dec 4, 2024) and was seeing the same artifacts. Testing earlier versions wasn't possible without rewriting the camera-frame script.

Machine A (Desktop)

Bug reproducible? YES - frequent artifacting, easy to reproduce

Graphics: nvidia rtx 3090 (discrete)
Browsers: Firefox 136 (stable, snap), Chrome 134 (stable, deb)
HDR monitor: No
OS: Ubuntu 24.10 (Wayland)

WebGL Report

Image

Machine B (Laptop)

Can reproduce? NO - no artifacts at all

Graphics: Intel UHD (integrated) + nvidia Quadro T1000 (discrete)
Browsers: Firefox 136 (stable, snap), Chrome 134 (stable, deb)
HDR monitor: No
OS: Ubuntu 24.10 (Wayland)

WebGL Report

Image

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