UV transfer between similar but different topology

Forums Technical Discussion UV transfer between similar but different topology

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anbt: Member; 82 posts; Joined: Dec. 2020; Offline

Sept. 7, 2023 2:49 p.m.

Hello,

I have dig the entire web for the beginning of an answer but couldn’t get anywhere.

I am trying to transfer UVs from a plant to a similar high poly bigger one made with VDB and converted back to poly.

I am using xyzdist() and primuv().

I still have some distortion and issues. See pictures.

What am I doing wrong?!!

Cheers,
Anbt

Edited by anbt - Sept. 7, 2023 14:50:38

Attachments:
IMG_0301.jpeg (4.7 MB)
IMG_0302.jpeg (6.1 MB)
IMG_0303.jpeg (5.4 MB)
IMG_0304.jpeg (7.3 MB)


CYTE: Member; 802 posts; Joined: Feb. 2017; Offline

Sept. 7, 2023 3:05 p.m.

Have you tried using attribute transfer set to vertex and attribute uv?

Cheers
CYTE


anbt: Member; 82 posts; Joined: Dec. 2020; Offline

Sept. 7, 2023 3:09 p.m.

CYTE
Have you tried using attribute transfer set to vertex and attribute uv?

yes, I tried, it is even worse

Edited by anbt - Sept. 7, 2023 15:11:23


anbt: Member; 82 posts; Joined: Dec. 2020; Offline

Sept. 7, 2023 3:39 p.m.

and the labs UV transfer also doesn't output good results


Jonathan de Blok: Member; 294 posts; Joined: July 2013; Online

Sept. 7, 2023 3:40 p.m.

it's not working because the UV seams will not match. So if you want to transfer you'll need to keep all the points/verts that are in the UV seams which will add quite a lot of extra polygons. Plan B would be to transfer the texture by baking, There are a few tools for that in labs. Google "houdini uv baking transfer texture" for more clues

More code, less clicks.


anbt: Member; 82 posts; Joined: Dec. 2020; Offline

Sept. 7, 2023 3:43 p.m.

Jonathan de Blok
it's not working because the UV seams will not match. So if you want to transfer you'll need to keep all the points/verts that are in the UV seams which will add quite a lot of extra polygons. Plan B would be to transfer the texture by baking, There are a few tools for that in labs. Google "houdini uv baking transfer texture" for more clues

OK, I wouldn't know how to do plan A but plan B seems easier. Will investigate, thanks


Aizatulin: Member; 504 posts; Joined: July 2005; Offline

Sept. 7, 2023 5:13 p.m.

Hi,

can you post an example file, where labs uv transfer fails?


anbt: Member; 82 posts; Joined: Dec. 2020; Offline

Sept. 7, 2023 5:23 p.m.

Aizatulin
Hi,

can you post an example file, where labs uv transfer fails?

Will do when I am back in front of Houdini

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