Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: LorenzoS on 2023-02-12, 10:59:34

Title: Bad resulto Uvw randomizer
Post by: LorenzoS on 2023-02-12, 10:59:34

Hi All,
i am trying a very simple test with CoromaUvwRandomizer map (see attachment) , a plane 400x400cm with uvwmap planar map of 100x100cm.
I would like to get a randomly rotated 100x100cm map repeat on plane, but I can't get the expected result, am I doing something wrong?

thank you

Title: Re: Bad resulto Uvw randomizer
Post by: romullus on 2023-02-12, 11:34:59

I just tried it and get the same result. It seems that UVW randomizer only randomizes positive U and V directions and then simply mirrors randomization in other directions. I'm moving the topic to the bug reporting board. Meanwhile you can simply move UVW map gizmo outside the mesh boundaries, or use UVW unwrap to precisely place UVs where you want. This should fix your issue.

Title: Re: Bad resulto Uvw randomizer
Post by: LorenzoS on 2023-02-14, 11:19:57

Thank you for answer,

Quote

Meanwhile you can simply move UVW map gizmo outside the mesh boundaries

..does not solve

Title: Re: Bad resulto Uvw randomizer
Post by: romullus on 2023-02-14, 11:47:45

It certainly fixes the issue for me. Can you show your results?

Title: Re: Bad resulto Uvw randomizer
Post by: LorenzoS on 2023-02-14, 12:47:04

this is my result

Title: Re: Bad resulto Uvw randomizer
Post by: romullus on 2023-02-14, 14:09:26

Sorry, i explained it slightly wrong - not only UV map gizmo should be outside of mesh boundaries, but also its projection in X and Y direction can't cross the mesh. I think it would be easier to understand the concept if you would add UVW unwrap modifier and open its window - no part of object's UV island should cross 0 axis of U and V coordinates, otherwise UVW randomizer will mirror its randomization. I hope it's more clear now.

Title: Re: Bad resulto Uvw randomizer
Post by: LorenzoS on 2023-02-14, 14:28:58

Clear now,
so:

Quote

Meanwhile you can simply move UVW map gizmo outside the mesh boundaries

and

Quote

but also its projection in X and Y direction can't cross the mesh

.

Thank you

Title: Re: Bad resulto Uvw randomizer
Post by: romullus on 2023-02-14, 14:42:59

You're welcome! I hope this bug will be fixed sooner rather than later, so we don't have to rely on such workarounds.

Title: Re: Bad resulto Uvw randomizer
Post by: Aram Avetisyan on 2023-08-16, 12:43:06

There is a double/mirror tiling at the center of UVWMap when using Randomizer with "Number of tiles" set to 1.0. This has been reproduced.

This is reported now. Thanks.

(Internal ID=1184325933)

Title: Re: Bad resulto Uvw randomizer
Post by: rowmanns on 2023-11-15, 20:23:59

Hi,

This is fixed in v11, you can grab the latest daily build here: https://forum.corona-renderer.com/index.php?topic=40442.0

Rowan

Title: Re: Bad resulto Uvw randomizer
Post by: LorenzoS on 2023-11-16, 09:28:45

well to know, thank you.