Ambient Occlusion node with image texture #112556

New Issue

vintezis · 2023-09-19T08:57:48+02:00

vintezis commented

2023-09-19 08:57:48 +02:00

System Information
Operating system: macOS 12.6.8 – 16GB
Graphics card: Apple M1 8/4-4

Blender Version
Broken: 3.6.3 RC
Worked: (newest version of Blender that worked as expected)

When I mix an image texture (here a PNG) with Ambient Occlusion node, its not working, or results a weird render at least.
In the render-preview the image is disappearing, but in the final render is there but partially and broken (i think).

Attached a screenshot and a very simple blend file.

I hope I am the idiot and doing something wrong, but after a full week I didn't find the answer to this strange behavior.

Edit: it seems an earlier resolved problem is back: #94050
If I switch to CPU-rendering, its working fine... :(

Edit2: If I turn OFF MetalRT(Experimental) in Preferences, its working fine!

**System Information** Operating system: macOS 12.6.8 – 16GB Graphics card: Apple M1 8/4-4 **Blender Version** Broken: 3.6.3 RC Worked: (newest version of Blender that worked as expected) When I mix an image texture (here a PNG) with Ambient Occlusion node, its not working, or results a weird render at least. In the render-preview the image is disappearing, but in the final render is there but partially and broken (i think). Attached a screenshot and a very simple blend file. I hope I am the idiot and doing something wrong, but after a full week I didn't find the answer to this strange behavior. **Edit: it seems an earlier resolved problem is back:** [#94050](https://projects.blender.org/blender/blender/issues/94050) If I switch to CPU-rendering, its working fine... :( Edit2: If I turn OFF MetalRT(Experimental) in Preferences, its working fine!

AO-test.blend

1.1 MiB

SCR-20230919-c2d.jpeg

1.6 MiB

vintezis added the

labels 2023-09-19 08:57:49 +02:00

YimingWu commented

2023-09-19 09:25:10 +02:00

Seems to be working just fine here, both cycles and eevee. So this could be specific to Apple.

Seems to be working just fine here, both cycles and eevee. So this could be specific to Apple. ![图片](/attachments/b65d01f3-f277-429d-aa6f-047db06b41ab)

图片.png

240 KiB

vintezis commented

2023-09-19 09:30:44 +02:00

Yes, as I wrote in Edit, it is a 2 year old issue (#94050), which is came back somehow... If I switch to CPU rendering, working fine.

👀 1

Brecht Van Lommel commented

2023-09-20 12:17:50 +02:00

@Michael-Jones, can you check?

🎉 1

vintezis commented

2023-09-25 09:22:15 +02:00

@Michael-Jones, can you check?

MetalRT (Experimental) in Preferences was guilty. Turned OFF and its working.

> @Michael-Jones, can you check? MetalRT (Experimental) in Preferences was guilty. Turned OFF and its working.

Pratik Borhade added the

labels 2023-09-25 10:50:19 +02:00

Michael Jones (Apple) commented

2023-09-25 15:54:23 +02:00

@vintezis, I tried on a M2 Max MacBook Pro running macOS 14 and couldn't reproduce this - I wonder if this is an OS issue? It might be worth retrying on macOS 13.x or even macOS 14 (...today is the last day of the macOS 14 beta before the stable release tomorrow).

Pratik Borhade added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2023-09-26 04:54:38 +02:00

vintezis commented

2023-09-27 11:35:29 +02:00

@vintezis, I tried on a M2 Max MacBook Pro running macOS 14 and couldn't reproduce this - I wonder if this is an OS issue? It might be worth retrying on macOS 13.x or even macOS 14 (...today is the last day of the macOS 14 beta before the stable release tomorrow).

Did you try turn on the MetalRT switcher? (I don't know what is doing exactly, but after I turned off, the AO mix with image texture is working fine)

> @vintezis, I tried on a M2 Max MacBook Pro running macOS 14 and couldn't reproduce this - I wonder if this is an OS issue? It might be worth retrying on macOS 13.x or even macOS 14 (...today is the last day of the macOS 14 beta before the stable release tomorrow). Did you try turn on the MetalRT switcher? (I don't know what is doing exactly, but after I turned off, the AO mix with image texture is working fine)

Michael Jones (Apple) commented

2023-09-27 16:29:42 +02:00

Yes, here's the result that I got with MetalRT enabled (M2 Max MacBook Pro + macOS 14):

Yes, here's the result that I got with MetalRT enabled (M2 Max MacBook Pro + macOS 14): ![image](/attachments/accc8dcb-fb5c-48c0-9cc2-843e256c2de1)

image.png

1.3 MiB

Brecht Van Lommel commented

2023-10-02 17:07:50 +02:00

I guess there was some fix or other change in the Metal drivers that made this work. We are already planning to bump the minimum required macOS version for MetalRT for other reasons in 4.x. Given that this is only an experimental feature in 3.6, finding a workaround for these older macOS versions is not something we can spend time on.

I think we should bump the minimum macOS version for MetalRT version in 3.6 LTS. To either macOS 13 or 14, depending which is the first one that works.

I guess there was some fix or other change in the Metal drivers that made this work. We are already planning to bump the minimum required macOS version for MetalRT for other reasons in 4.x. Given that this is only an experimental feature in 3.6, finding a workaround for these older macOS versions is not something we can spend time on. I think we should bump the minimum macOS version for MetalRT version in 3.6 LTS. To either macOS 13 or 14, depending which is the first one that works.

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Ambient Occlusion node with image texture #112556