I can only use 4 UDIM textures #73133

New Issue

Thura Thein Tin · 2020-01-15T12:40:59+01:00

Thura Thein Tin commented

2020-01-15 12:40:59 +01:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.13

Blender Version
Broken: version: 2.82 (sub 6), branch: master, commit date: 2020-01-14 23:08, hash: 3edd8d5b07
Worked: (optional)

Short description of error
In a material only 4 UDIM Textures work. The 5th UDIM cause error. Box Test.zip

Exact steps for others to reproduce the error

Please unzip the attached file .
Open attached blend file.
The box is pink ( error due to 5 UDIM texture)
Please remove any UDIM texture in shader window. No error.
So, I think blender can only handle maximum 4 UDIM textures.

Thanks you.

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.13 **Blender Version** Broken: version: 2.82 (sub 6), branch: master, commit date: 2020-01-14 23:08, hash: `3edd8d5b07` Worked: (optional) **Short description of error** In a material only 4 UDIM Textures work. The 5th UDIM cause error. [Box Test.zip](https://archive.blender.org/developer/F8279639/Box_Test.zip) **Exact steps for others to reproduce the error** 1. Please unzip the attached file . 2. Open attached blend file. 3. The box is pink ( error due to 5 UDIM texture) 4. Please remove any UDIM texture in shader window. No error. 5. So, I think blender can only handle maximum 4 UDIM textures. Thanks you.

Thura Thein Tin commented

2020-01-15 12:40:59 +01:00

Added subscriber: @Thura

blender-admin commented

2020-01-15 12:40:59 +01:00

This issue was referenced by 7d8a186335

This issue was referenced by 7d8a186335400cb7ad69d24aab89e7a215a70348

Philipp Oeser commented

2020-01-15 15:17:39 +01:00

Added subscribers: @fclem, @LukasStockner, @lichtwerk

Philipp Oeser commented

2020-01-15 15:17:39 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2020-01-15 15:17:39 +01:00

I am getting:

GPUShader: error: too many samplers in shader.

The max number reported for me (nvidia 970m) is:

GPU_max_textures 192

Afaics, there are 5 UDIM textures (with 5 2048px x 2048px tiles each) in place here.
Not sure how/if these are split up internally here.

@fclem, @LukasStockner : why are we reaching the limit with this shader?

I am getting: ``` GPUShader: error: too many samplers in shader. ``` The max number reported for me (nvidia 970m) is: ``` GPU_max_textures 192 ``` Afaics, there are 5 UDIM textures (with 5 2048px x 2048px tiles each) in place here. Not sure how/if these are split up internally here. @fclem, @LukasStockner : why are we reaching the limit with this shader?

Clément Foucault commented

2020-01-15 17:16:07 +01:00

This is a limitation @LukasStockner is planning to lift with some patch. Should be included for final release.

The reason is because eevee also use many samplers on its own before using user textures. Also you should look at GPU_max_textures_frag which is around 24 on high end hardware.

This is a limitation @LukasStockner is planning to lift with some patch. Should be included for final release. The reason is because eevee also use many samplers on its own before using user textures. Also you should look at GPU_max_textures_frag which is around 24 on high end hardware.

Philipp Oeser commented

2020-01-15 17:25:42 +01:00

@fclem: thx for clarification, it is this patch D6456: Use 2D texture arrays for UDIM drawing in Eevee to avoid texture limit

@fclem: thx for clarification, it is this patch [D6456: Use 2D texture arrays for UDIM drawing in Eevee to avoid texture limit](https://archive.blender.org/developer/D6456)

Brecht Van Lommel commented

2020-01-15 17:37:11 +01:00

Added subscriber: @brecht