Halo artifacts with volumetrics in the "Diffuse Indirect" and "Transmission Indirect" passes #94698

System Information
Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.84

Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-05 22:15, hash: 1d9bac7d92
Worked: Never worked

Short description of error
Halo artifacts appear when volumetrics is enabled in the "Diffuse Indirect" and "Transmission Indirect" passes, no problem in blender 2.93.

Halo_Bug.blend

Exact steps for others to reproduce the error

Use Blender 3.1 alpha (Same with Blender 3.0 stable)
Use the "Halo_Bug" attach blend file.
Do F12 render.
Check the "Diffuse Indirect" and "Transmission Indirect" passes.
There is halo outline artifact in person, window opening and sky holes plane.
In the outliner turn off the "Volume Cube" object for rendering.
Do F12 render.
Notice no halo outline artifact in person, window opening and sky holes plane.
Use Blender 2.93.x.
Do F12 render and make sure "Volume Cube" object is enabled.
Notice no halo outline artifact in person, window opening and sky holes plane.
Done.

Notes: The more render samples the more defined the halo artifacts. Seems to occur when their difference object position and/or material.

Halo outline artifacts Blender 3.1 with volumetrics enable for the "Diffuse Indirect" pass:

No Halo outline artifacts Blender 3.1 with volumetrics disable for the "Diffuse Indirect" pass:

Halo outline artifacts Blender 3.1 with volumetrics enable for the "Transmission Indirect" pass:

No Halo outline artifacts Blender 3.1 with volumetrics disable for the "Transmission Indirect" pass:

No Halo outline artifacts Blender 2.9.3.x with volumetrics enable for the "Diffuse Indirect" pass:

No Halo outline artifacts Blender 2.9.3.x with volumetrics enable for the "Transmission Indirect" pass:

**System Information** Operating system: Windows-10-10.0.22000-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.84 **Blender Version** Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-05 22:15, hash: `1d9bac7d92` Worked: Never worked **Short description of error** Halo artifacts appear when volumetrics is enabled in the "Diffuse Indirect" and "Transmission Indirect" passes, no problem in blender 2.93. [Halo_Bug.blend](https://archive.blender.org/developer/F12791750/Halo_Bug.blend) **Exact steps for others to reproduce the error** 1. Use Blender 3.1 alpha (Same with Blender 3.0 stable) 2. Use the "Halo_Bug" attach blend file. 3. Do F12 render. 4. Check the "Diffuse Indirect" and "Transmission Indirect" passes. 5. There is halo outline artifact in person, window opening and sky holes plane. 6. In the outliner turn off the "Volume Cube" object for rendering. 7. Do F12 render. 8. Notice no halo outline artifact in person, window opening and sky holes plane. 9. Use Blender 2.93.x. 10. Do F12 render and make sure "Volume Cube" object is enabled. 11. Notice no halo outline artifact in person, window opening and sky holes plane. 12. Done. Notes: The more render samples the more defined the halo artifacts. Seems to occur when their difference object position and/or material. Halo outline artifacts Blender 3.1 with volumetrics enable for the "Diffuse Indirect" pass: ![Halo_Volumetric_Diffuse_Ind_310.jpg](https://archive.blender.org/developer/F12791773/Halo_Volumetric_Diffuse_Ind_310.jpg) No Halo outline artifacts Blender 3.1 with volumetrics disable for the "Diffuse Indirect" pass: ![Halo_Diffuse_Ind_310.jpg](https://archive.blender.org/developer/F12791781/Halo_Diffuse_Ind_310.jpg) Halo outline artifacts Blender 3.1 with volumetrics enable for the "Transmission Indirect" pass: ![Halo_Volumetric_Transmission_Ind_310.jpg](https://archive.blender.org/developer/F12791776/Halo_Volumetric_Transmission_Ind_310.jpg) No Halo outline artifacts Blender 3.1 with volumetrics disable for the "Transmission Indirect" pass: ![Halo_Transmission_Ind_310.jpg](https://archive.blender.org/developer/F12791783/Halo_Transmission_Ind_310.jpg) No Halo outline artifacts Blender 2.9.3.x with volumetrics enable for the "Diffuse Indirect" pass: ![Halo_Volumetric_Diffuse_Ind_293.jpg](https://archive.blender.org/developer/F12791786/Halo_Volumetric_Diffuse_Ind_293.jpg) No Halo outline artifacts Blender 2.9.3.x with volumetrics enable for the "Transmission Indirect" pass: ![Halo_Volumetric_Transmission_Ind_293.jpg](https://archive.blender.org/developer/F12791788/Halo_Volumetric_Transmission_Ind_293.jpg)

Added subscriber: @eklein

#100682 was marked as duplicate of this issue

Changed status from 'Needs Triage' to: 'Confirmed'

This issue was referenced by blender/cycles@fbc193d900

This issue was referenced by 22a8e934e4

Changed status from 'Confirmed' to: 'Resolved'

Brecht,

I tested the fix. The halo issue was solve for the diffuse indirect pass in this scene, but not for the transmission indirect pass.

The halo issue still persist in the diffuse indirect pass in this other scene. Works fine with 2.93. Blend file Halo_Hall_Bug.blend

Hall Halo outline artifacts Blender 3.1 with volumetrics enable for the "Diffuse Indirect" pass:

Changed status from 'Resolved' to: 'Confirmed'

Changed status from 'Confirmed' to: 'Resolved'

Can you please reopen this bug report. I check the latest builds and this issue is not resolved when volumetrics is enable works fine in 2.93.

Check the "Halo_Hall_Bug.blend" and notice the halo artifacts in the "Diffuse Indirect" pass and on the "Halo_Bug.blend" the halo artifacts in the "Transmission Indirect" pass.

Added subscriber: @ThomasDinges

Changed status from 'Resolved' to: 'Confirmed'

It was accidentally closed again, while syncing the standalone repository.

Added subscriber: @Guillaume-Tisserant

Added subscriber: @Tim-Masin

Are there any news related to this post? It´s very important for us that the problem will be fixed soon :(

Is there any news about the bug?
Will it be fixed in the next Blender version?
The bug has "normal" proprity, but it prevents normal compositing work on renders, which is critical for many projects.

Added subscribers: @brecht, @OmarEmaraDev

This issue was referenced by e7a554e551

Changed status from 'Confirmed' to: 'Resolved'

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Halo artifacts with volumetrics in the "Diffuse Indirect" and "Transmission Indirect" passes #94698