EEVEE: transparent black line on ambient occlusion pass when render #121894

New Issue

Oliver Etchebarne · 2024-05-16T23:04:32+02:00

Oliver Etchebarne commented

2024-05-16 23:04:32 +02:00

System Information
Operating system: Linux-6.8.9-3-MANJARO-x86_64-with-glibc2.39 64 Bits, X11 UI
Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.78

Blender Version
Broken: version: version: 4.1.1, branch: makepkg (modified), commit date: 2024-04-15 15:11, hash: e1743a0317bc
Worked: never tested.

Short description of error
In EEVEE, when a plane not directly facing the camera fills the camera view and ambient occlusion is active (also its pass), in the render view, selecting the AO pass, there is a semi transparent black line 1 pixel width at the top and bottom of the image.

If the plane is aligned to the camera, the black lines disappear, but rotating the plane so it doesn't directly points to the camera, the black lines start to appear.

Tested also on 4.2.0-alpha+main.ed2be4c89f59 with EEVEE legacy, with same results.

Exact steps for others to reproduce the error

In a default new scene, add mesh > plane
Scale × 15, so it fills the camera view
In render properties, activate Ambient Occlusion (and in 4.2.0-alpha, select EEVEE (Legacy))
In view layer properties > Passes, activate Ambient Occlusion
Render image
In the render view, "pass" drop menu, select AO
Zoom at the top or bottom of the image, there is a semi transparent 1 pixel width black line.

**System Information** Operating system: Linux-6.8.9-3-MANJARO-x86_64-with-glibc2.39 64 Bits, X11 UI Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.78 **Blender Version** Broken: version: version: 4.1.1, branch: makepkg (modified), commit date: 2024-04-15 15:11, hash: `e1743a0317bc` Worked: never tested. **Short description of error** In EEVEE, when a plane not directly facing the camera fills the camera view and ambient occlusion is active (also its pass), in the render view, selecting the AO pass, there is a semi transparent black line 1 pixel width at the top and bottom of the image. If the plane is aligned to the camera, the black lines disappear, but rotating the plane so it doesn't directly points to the camera, the black lines start to appear. Tested also on 4.2.0-alpha+main.ed2be4c89f59 with EEVEE legacy, with same results. **Exact steps for others to reproduce the error** - In a default new scene, add mesh > plane - Scale × 15, so it fills the camera view - In render properties, activate Ambient Occlusion (and in 4.2.0-alpha, select EEVEE (Legacy)) - In view layer properties > Passes, activate Ambient Occlusion - Render image - In the render view, "pass" drop menu, select AO - Zoom at the top or bottom of the image, there is a semi transparent 1 pixel width black line.

black-line-on-ao.blend

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Captura de pantalla_2024-05-16_15-57-39.jpg

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Captura de pantalla_2024-05-16_15-57-58.jpg

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Captura de pantalla_2024-05-16_15-57-39.jpg

Captura de pantalla_2024-05-16_15-57-58.jpg

Oliver Etchebarne added the

labels 2024-05-16 23:04:32 +02:00

YimingWu commented

2024-05-17 05:22:01 +02:00

I think this might be the quirk of screen space tracing...

I can see the semi transparent black line on the top of the image but not bottom. On latest 4.2 too.

I think this might be the quirk of screen space tracing... I can see the semi transparent black line on the top of the image but not bottom. On latest 4.2 too. ![图片](/attachments/3239b877-e0bd-4ab4-a351-96b65fda4d6d)

图片.png

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YimingWu added

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EEVEE: transparent black line on ambient occlusion pass when render #121894