Eevee Ambient Occlusion is very noisy even with high sample count #81741

New Issue

Vesa · 2020-10-15T17:30:23+02:00

Vesa commented

2020-10-15 17:30:23 +02:00

System Information
Operating system: Linux-5.4.0-51-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.80.02

Blender Version
Broken: version: 2.90.1, branch: master, commit date: 2020-09-23 06:43, hash: 3e85bb34d0

Short description of error
Eevee Ambient Occlusion is very noisy and increasing sample count from 64 to 1024 does not improve the output visually at all.

Sample file rendering:

Exact steps for others to reproduce the error

open Sample file
press F12 to render

b90_ao_bug.blend
[Based on the default startup or an attached .blend file (as simple as possible)]

**System Information** Operating system: Linux-5.4.0-51-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.80.02 **Blender Version** Broken: version: 2.90.1, branch: master, commit date: 2020-09-23 06:43, hash: `3e85bb34d0` **Short description of error** Eevee Ambient Occlusion is very noisy and increasing sample count from 64 to 1024 does not improve the output visually at all. Sample file rendering: ![b90_ao_bug.png](https://archive.blender.org/developer/F8994977/b90_ao_bug.png) **Exact steps for others to reproduce the error** - open Sample file - press F12 to render [b90_ao_bug.blend](https://archive.blender.org/developer/F8994958/b90_ao_bug.blend) [Based on the default startup or an attached .blend file (as simple as possible)]

Vesa commented

2020-10-15 17:30:23 +02:00

Added subscriber: @xard

Germano Cavalcante commented

2020-10-16 16:12:41 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-10-16 16:12:41 +02:00

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

Germano Cavalcante commented

2020-10-16 16:12:41 +02:00

Thanks for the report, I can confirm.
It is possible that it is a limitation, but it is not described in https://docs.blender.org/manual/en/latest/render/eevee/limitations.html

Thanks for the report, I can confirm. It is possible that it is a limitation, but it is not described in https://docs.blender.org/manual/en/latest/render/eevee/limitations.html

Vesa commented

2020-10-17 15:51:43 +02:00

One workaround is to brute force the render 2x resolution and scale down the image. Though this creates problems if the render resolution is quite high to begin with.

There might be also way around this for still images if the animation frames have different noise seed but I have not tested this.

One workaround is to brute force the render 2x resolution and scale down the image. Though this creates problems if the render resolution is quite high to begin with. There might be also way around this for still images if the animation frames have different noise seed but I have not tested this.

blender-admin commented

2021-03-08 17:21:17 +01:00

This issue was referenced by bf799cb12c

This issue was referenced by bf799cb12c6991ef8fcbfcd0bc0777e62e08ad9b

Clément Foucault commented

2021-03-08 17:26:37 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Clément Foucault closed this issue

2021-03-08 17:26:37 +01:00

Clément Foucault self-assigned this 2021-03-08 17:26:37 +01:00

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Eevee Ambient Occlusion is very noisy even with high sample count #81741