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Thread: UV Maps to UDIMs in Lightwave 2018 ?

  1. #1
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    UV Maps to UDIMs in Lightwave 2018 ?

    Hi,

    Does anyone know how to convert UV Maps to UDIMs please ?

    I UV Mapped a character in Zbrush and now need to create UDIMs for those UVs, in order to

    export as FBX to Substance Painter.

    Thank You.

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  3. #3
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    Thank you BigHache.

    I already tried both links last night. There was a disparity between the tutorials and
    what I saw in Lightwave. When I create the UDIMs and the image sequence,
    the images don’t appear in a sequence either in the image editor or in the UV Map
    View Port.

    I had some luck creating UDIMS, but copying over
    tbe UV maps, created in Zbrush was problematic. It worked, but with
    a kind of ghost of vertex points behind the polygons in the UDIM UVs.

    When I created the third UDIM, 1003, the UDIM became corrupted visually.

    I am probably doing this all wrong. Does anyone know of a better way please ?

    Thank you.
    Last edited by Renaissance; 03-22-2018 at 02:02 AM.

  4. #4
    Kamehameha Chameleon BigHache's Avatar
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    Hmm, weird.

    OK, I did about as basic a test as one could do. I created 3 images of primary(ish) colors, saving as "test_1001", "test_1002", and "test_1003".
    Imported "test_1001" and set image type to UDIM. Images appear correctly in Image Editor.

    Click image for larger version. 

Name:	UDIM_images.PNG 
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ID:	140834

    I made a cube, Atlas map, transforming UVs over UDIM area.
    Everything seems to be working as expected.

    Click image for larger version. 

Name:	UDIM_test.PNG 
Views:	61 
Size:	58.0 KB 
ID:	140833

    I don't use ZBrush so I cannot account for challenges that may arise with that workflow.

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    Hi Big Hache,

    Thank you for the explanation.

    I understand the workflow and it works fine for me also.

    The workflow that I hope to use, is bringing in a number of mesh from Zbrush,
    then merging the number of mesh together as a character.

    Next I would want to somehow convert the individual
    UV maps into UDIMs.

    I have had some success using copy/ paste UVs, but sometimes
    with imperfect results.

    Does anyone know a workaround for this please ?

    Thank You.

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    Hello Big Hache,

    I didn't realize that just the first image in the sequence should be loaded into the image editor. Everything works as expected, thank you.

    More over, using the Copy Vertex Map option in the Vertex Maps panel, I could easily create UDIMs on seperate layers for each object, then combine into one set of UDIMs.

    My next step is to attempt the same with an imported OBJ from Zbrush

    Thank you.

  7. #7
    Kamehameha Chameleon BigHache's Avatar
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    OK great! Glad you got that sorted. I wasn't sure what else to offer up.

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    Hi BigHache,

    I am still struggling to bring the Zbrush UVs into LW UDIMs.

    I will post my results here if I ever figure this out.

  9. #9
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    Hi, Update

    I figured out how to use Zbrush UV maps with UDIMs in LW2018.

    After using GOZ, to bring a ZBRUSH low poly mesh into LW,

    the next step was to load sequenced images, name_1001 to, name_ however

    many images you need.

    I opened up the existing UV map and separated out each map

    into the UDIM space. This was achieved by simply

    selecting the polygons of each map and moving each

    in units of 1 meter, with the action center set to selection, the

    distance in meters required, with the ctrl key held down.

    That’s the basics of it. Worked a charm.

    Exported out to FBX and Bob’s your Unckle.
    Last edited by Renaissance; 03-27-2018 at 05:35 PM.

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