Material Preview Not Generating MacOS #99555

New Issue

John Dunnigan · 2022-07-08T22:51:43+02:00

John Dunnigan commented

2022-07-08 22:51:43 +02:00

System Information
Operating system: macOS-12.4-x86_64-i386-64bit 64 Bits
Graphics card: Apple M1 Max Apple 4.1 Metal - 76.3

Blender Version
Broken: version: 3.2.1, branch: master, commit date: 2022-07-05 15:44, hash: a2d59b2dac

Short description of error
Material Preview will not generate, shows pinkish/purple object. Render, Solid and Wireframe generate properly.

Exact steps for others to reproduce the error
Possibly having 8 or more textures{F13275398} on an object will create this problem.

**System Information** Operating system: macOS-12.4-x86_64-i386-64bit 64 Bits Graphics card: Apple M1 Max Apple 4.1 Metal - 76.3 **Blender Version** Broken: version: 3.2.1, branch: master, commit date: 2022-07-05 15:44, hash: `a2d59b2dac` **Short description of error** Material Preview will not generate, shows pinkish/purple object. Render, Solid and Wireframe generate properly. **Exact steps for others to reproduce the error** Possibly having 8 or more textures{[F13275398](https://archive.blender.org/developer/F13275398/Screen_Shot_2022-07-08_at_4.50.21_PM.png)} on an object will create this problem.

John Dunnigan commented

2022-07-08 22:51:43 +02:00

Added subscriber: @JohnPD

John Dunnigan commented

2022-07-08 22:55:30 +02:00

![Screen Shot 2022-07-08 at 4.50.21 PM.png](https://archive.blender.org/developer/F13275434/Screen_Shot_2022-07-08_at_4.50.21_PM.png)

Pratik Borhade commented

2022-07-09 07:48:11 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-07-09 07:48:11 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Pratik Borhade commented

2022-07-09 07:48:11 +02:00

Hi, thanks for the report. It is possible that you've exceeded the limit of texture image units.
Did you get any error in console? {nav Window > Toggle System Console}
Please also upload your .blend file

Hi, thanks for the report. It is possible that you've exceeded the limit of texture image units. Did you get any error in console? {nav Window > Toggle System Console} Please also upload your .blend file

John Dunnigan commented

2022-07-09 15:26:18 +02:00

Scene1.blend

I've uploaded the .blend file above... And thank you for your quick response... There is no "Toggle System Console" choice under "Window" for MacOS... From what I've been able to learn, and please forgive me because I'm a novice with Blender, I may have indeed exceeded the texture limit for a single M1 chip (others have mentioned something like this). However, the M1 Max has 2 M1 chips, so I thought this may be something that those who have been optimizing Blender for MacOS might be working on.

[Scene1.blend](https://archive.blender.org/developer/F13279349/Scene1.blend) I've uploaded the .blend file above... And thank you for your quick response... There is no "Toggle System Console" choice under "Window" for MacOS... From what I've been able to learn, and please forgive me because I'm a novice with Blender, I may have indeed exceeded the texture limit for a single M1 chip (others have mentioned something like this). However, the M1 Max has 2 M1 chips, so I thought this may be something that those who have been optimizing Blender for MacOS might be working on.

Pratik Borhade commented

2022-07-12 11:29:38 +02:00

Thanks. textures are missing in your file. Can you pack and reupload the file with them?
To pack textures, follow: {nav File > external data > Pack Resources} then save the file.
I added random textures in place of empty texture slots but the preview generates after that (no magenta color).

Thanks. textures are missing in your file. Can you pack and reupload the file with them? To pack textures, follow: {nav File > external data > Pack Resources} then save the file. I added random textures in place of empty texture slots but the preview generates after that (no magenta color).

John Dunnigan commented

2022-07-12 23:52:23 +02:00

Thanks, Pratik. I believe I've provided what you need below. Also, I can provide you with screen shots of others explaining the issue from the Blender course I'm currently taking if that would help. All the people having issues are on a Mac with the M1 chip. Those using Windows computers are having no issues.
Scene2.blend

Thanks, Pratik. I believe I've provided what you need below. Also, I can provide you with screen shots of others explaining the issue from the Blender course I'm currently taking if that would help. All the people having issues are on a Mac with the M1 chip. Those using Windows computers are having no issues. [Scene2.blend](https://archive.blender.org/developer/F13289551/Scene2.blend)

Pratik Borhade commented

2022-07-13 03:18:08 +02:00

Added subscriber: @mano-wii

Pratik Borhade commented

2022-07-13 03:18:08 +02:00

@mano-wii, can you check in your M1?

Germano Cavalcante commented

2022-07-13 21:36:00 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Germano Cavalcante closed this issue

2022-07-13 21:36:00 +02:00

Germano Cavalcante commented

2022-07-13 21:36:00 +02:00

This is a hardware limitation as described in the ERROR message in the prompt:

ERROR (gpu.shader): GPU_material_compile Linking: 
      | Error: Implementation limit of 16 active fragment shader samplers (e.g., maximum number of supported image units) exceeded, fragment shader uses 17 samplers

The problem here is that the shader is too complex and uses more textures than GPU + OpenGL supports.
It is possible that the number of supported images will be higher when other rendering APIs (like Metal) are implemented.
But hardware limitations like these are not considered bugs.

Try to reduce the number of textures used in the same material.

This is a hardware limitation as described in the ERROR message in the prompt: ``` ERROR (gpu.shader): GPU_material_compile Linking: | Error: Implementation limit of 16 active fragment shader samplers (e.g., maximum number of supported image units) exceeded, fragment shader uses 17 samplers ``` The problem here is that the shader is too complex and uses more textures than GPU + OpenGL supports. It is possible that the number of supported images will be higher when other rendering APIs (like Metal) are implemented. But hardware limitations like these are not considered bugs. Try to reduce the number of textures used in the same material.

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Material Preview Not Generating MacOS #99555