A single texture from a UDIM won't load as such #95227

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.09

Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: 84da05a8b8
Worked: (newest version of Blender that worked as expected)

Short description of error

Blender won't reckognize a single UDIM file that I need to drive a specific part of a map to be changed. E.g. "texture_file.1003.png" won't load by itself unless I load the other "1001" and "1002" together. The thing is that I don't need the other parts, just what's in "1003" UDIM tile. 
I have a UDIm normal map which I want to activate parts depending on the deformation of the mesh, so I'm assigning different alpha maps to be triggered when these parts deform. Each part is very specific and involve only 1 UDIM tile, but I'm having to assign 16x16 all black textures in all the spare UDIM tiles, otherwise Blender won't reckognize that is about a UDIM, it will take it as a simple UV.

Exact steps for others to reproduce the error

I assign normal map textures to a UDIM mesh.
I create a mix node that will alternate between a normal texture set and another normal texture set which represents the deformed mesh.
I create a series of "mix" nodes, input them with alpha maps. Each of the maps refers to a single UDIM tile (for every independent spot that I want to deform). And output the last one to the "factor" of the preview thread mix node.
Blender won't reckognize a single UDIM tile alpha texture 'cause it needs the other tiles to complete the UDIM..

OBS: other shading softwares will reckognize a separate UDIM tile texture, without the need to input all the others as tiny bleck maps just to fullfill the rest of the UDIM set.
When I use so many texture is bad for the optimization, in spite they're just 16x16 bit textures, and for organization as well. And plus: when I input more than 10 texture tile sets Blender stops reckognizing the material in "material shading" view - the material turns purple.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.09 **Blender Version** Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: `84da05a8b8` Worked: (newest version of Blender that worked as expected) **Short description of error** ``` Blender won't reckognize a single UDIM file that I need to drive a specific part of a map to be changed. E.g. "texture_file.1003.png" won't load by itself unless I load the other "1001" and "1002" together. The thing is that I don't need the other parts, just what's in "1003" UDIM tile. I have a UDIm normal map which I want to activate parts depending on the deformation of the mesh, so I'm assigning different alpha maps to be triggered when these parts deform. Each part is very specific and involve only 1 UDIM tile, but I'm having to assign 16x16 all black textures in all the spare UDIM tiles, otherwise Blender won't reckognize that is about a UDIM, it will take it as a simple UV. ``` **Exact steps for others to reproduce the error** - I assign normal map textures to a UDIM mesh. - I create a mix node that will alternate between a normal texture set and another normal texture set which represents the deformed mesh. - I create a series of "mix" nodes, input them with alpha maps. Each of the maps refers to a single UDIM tile (for every independent spot that I want to deform). And output the last one to the "factor" of the preview thread mix node. - Blender won't reckognize a single UDIM tile alpha texture 'cause it needs the other tiles to complete the UDIM.. OBS: other shading softwares will reckognize a separate UDIM tile texture, without the need to input all the others as tiny bleck maps just to fullfill the rest of the UDIM set. When I use so many texture is bad for the optimization, in spite they're just 16x16 bit textures, and for organization as well. And plus: when I input more than 10 texture tile sets Blender stops reckognizing the material in "material shading" view - the material turns purple.

Added subscriber: @Yerus_Ovelha

Added subscriber: @Peine_Perdue

... unless I load the other "1001" and "1002" together.

This is almost true, Blender won't load UDIMs unless it finds a 1001 atm. Meaning that the 1002 isn't necessary if you need 1003.

But i totally get your point, and i've been forced to hack that in production aswell.

Thanks. I see, inputting only the .1001 is performance worth but not organization worth, at least to me. What is your work around for that can I ask?

Added subscriber: @brecht

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

This seems to be solved in Blender 3.1, you can try the latest build from:
https://builder.blender.org/download/daily/

Hmm.. great, I'll eagerly wait for the release! (don't like alpha and beta testing). Hope this works, and don't break every add-on from outside Blender like 3.0 did!!

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

I'll consider this resolved then.

Thanks!

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A single texture from a UDIM won't load as such #95227