3ds max Transferring UVs Breaks uv mesh

MrNinjutsu

Hey, I was wondering if anyone could help me out with this issue.

Two meshes, same tricount, same topology, nothing remotely unique that differentiates either of the two. Except different uvs and when I transfer the new uvs to the old mesh, the uvs break up. No idea why this is happening and I feel like i'm overlooking something or i'm just being an idiot. Any help would be great.

Left is old mesh with old uvs - Right is dup mesh with new uvs transferred & broken



Video of it breaking.

And another video which is crazy.

The mesh that I used to make the new uvs was from the old mesh, so there's literally no difference in topology.

Unless there is something I'm missing, please help!

Thanks.

Joost

Not sure what it could be, but you could try resetting Xforms and converting to editable mesh and back to editable poly.

these scripts might be helpful
http://www.scriptspot.com/3ds-max/scripts/transfer-uv
http://www.scriptspot.com/3ds-max/scripts/morphix (only if the vert order has been changed somehow)

amisima

Hello,
Like Joost said, the possible problem can be different vertex order. You can test this by using Morph modifier. Both scripts above can help. Another way to fix bad vertex order - Mudbox.
But there is another possible reason: different triangulation.
Example: http://i.gyazo.com/bc9ac2ab4d30c04b10165de8391dec11.gif
Left sphere is created/unwraped in max, right one in 3d-coat. Export/import is handled by an applink using .obj. I tried to copy/paste the uvs with Channel info. You can see the result.
The fix here is to use "re triangulate" option in Edit poly or Editable poly on the imported object and then, like Joost said, convert to editable mesh and then back to editable poly. The convert is somehow important (maybe involve some sort of face/edge index reordering ?) Result:
http://i.gyazo.com/3d01e44735ccbaa30e99c29fecf65238.gif
Hope this helps a bit.
Regards

MrNinjutsu

Awesome thanks Guys/gals I'll try those things out soon and post back if successful or not!

Greatly appreciated!

Thane-

I got a lot of mesh corruption in max. I followed the youtub tutorial maker "Arrimus 3D's" advice to occasionally switch my editable polys to editable meshes and back and i ran into less problems however i wasn't very scientific about the monitoring, has to be said. He used that process before Boolean operations to help with corruption there, but i was having problems with the major destruction that wouldn't show up for over an hour, then be there all of a sudden, even back in autosave files, so im not sure if it would help here. His helpful youtube page if your interested. https://www.youtube.com/playlist?list=PLxt9ZAGPLIpeB8TcHrpzxvEI4Ve3SfZBC

thomasp

amisima: how do you use mudbox to change vertex order?

i agree that vertex order is the most likely cause and easy to terst using the morph modifier. you can fix it in max using the morphix script.