Virtual Textures UDIM support can't be enabled

Development Pipeline & Plugins
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1

The Engine behaves as if the Virtual Texture support was not enabled. It displays a warning in the texture editor that virtual texture support is off and only first tile will be built. It’s not possible to make UDIMs work.

2

Steps to Reproduce

  1. Enable virtual textures support in the Project Settings
  2. Import a multitile UDIM texture
  3. Open the texture in the texture Editor or apply it to the relevant asset (skeletal or static mesh)
3

Hey Marty. I just tried it and it worked fine for me. I do see a warning about it not working on Android, which I guess is disabled by default. Do you see something different?

4

Hey Shaun, thanks for looking into it.

I’m purely on Windows and didn’t look on any other platform.

When you open an asset that uses UDIMs, all the textures will come in broken, as only the first tile is read. And since we create linear content, we don’t package the project for different platforms.

But that’s interesting. Enabling UDIM support for mobile platform fixed the issue.[Image Removed]It’s as if the “Enable virtual texture support on Mobile” checkbox was doing the job that “Enable virtual texture support” should be doing.

Was it done on purpose? Should “Enable virtual texture support on Mobile” be on by default then?

5

Hey Marty,

I am not getting those results. I do get a warning about mobile platforms but they do not break the UDIM textures for me. Is this happening with ALL your UDIM textures or just certain ones? Are you able to share one of the textures that are breaking?

6

Hey Shaun,

The warning is there all the time, and also seems like all the models we’ve tested aren’t displayed correctly unless the Mobile option is on. I’ll try to find out if there’s any that wouldn’t be affected.

From my forums research I gather that some models are displayed correctly at random with the warning still present, but others aren’t.

7

Interesting. Ok, I’ll flag this for the dev to have a deeper look. Surprisingly, this is the first we’re hearing of it. Does enabling mobile support completely unblock you?

8

Yes, it solves it, after enabling the Mobile option, it all goes back to normal

Thanks for looking into it!