UDIM support

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Egert_Kanep
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UDIM support

Post by Egert_Kanep » Fri Aug 30, 2019 12:34 pm

Would using multiple uv tiles require modifications on luxcore part or blendluxcore?

An usual case in vfx is where you have an object UV's spread across multiple UV tiles and I was wondering if there is a way to implement a feature like this for LuxCore.

Any thoughts about it?
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lacilaci
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Re: UDIM support

Post by lacilaci » Fri Aug 30, 2019 1:54 pm

some info about specification and naming conventions of udim:https://docs.substance3d.com/spdoc/udim-144310352.html

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Dade
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Re: UDIM support

Post by Dade » Sun Sep 01, 2019 1:52 pm

It looks like something easy to add. But is it supported by Blender ? I mean, it could be cumbersome if it is supported only by LuxCore because it would not work in Blender OpenGL preview, etc.
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lacilaci
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Re: UDIM support

Post by lacilaci » Sun Sep 01, 2019 2:27 pm

Dade wrote:
Sun Sep 01, 2019 1:52 pm
It looks like something easy to add. But is it supported by Blender ? I mean, it could be cumbersome if it is supported only by LuxCore because it would not work in Blender OpenGL preview, etc.
It seems that udims are work in progress for blender 2.81 maybe? So I guess blender viewport couldn't display them but if you create them in a dedicated texture painting package (substance or mari for example) you could still use them if luxcore supported them and blender addon had a texture loader for them.

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Egert_Kanep
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Re: UDIM support

Post by Egert_Kanep » Mon Sep 02, 2019 4:25 pm

We can have multiple UV tiles in Blender, but currently all tiles get same the same texture. I tried using wrap mode black and the use uv offset to transform them to correct tile, but that didn't work in Blender 2.8, maybe it is not fully implemented yet.

svenkispert
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Re: UDIM support

Post by svenkispert » Wed Sep 02, 2020 8:58 pm

Hey,

i'm wondering if it's working now or it should be working? In the Image-Texture Node is an option for "UDIM Tiles", but i can't get it working. If i press F12 to render it out, there pops up an error in the error log.
-> "Material "Messer": Unsupported image source "TILED" in image "1001_Messer_lp_udim_BaseColor.png"
It's just an simple PBR-Setup with the Disney-Shader and 5 UDIMS.

I dont know if i'm just stupid or is the feature not finally integrated? :D

Kind regards!

Sven

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B.Y.O.B.
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Re: UDIM support

Post by B.Y.O.B. » Wed Sep 02, 2020 9:59 pm

This dropdown in the image texture is from Blender, so it contains entries not supported by LuxCore yet (like movie and UDIM).
I should show a warning in the UI if such an option is selected.

svenkispert
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Re: UDIM support

Post by svenkispert » Thu Sep 03, 2020 7:43 am

Ah okay. This makes sense. Then i'll do a workaround until it is implemented (?) in the future. :P

Thank you!

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