How to Unfold without affecting all UV

[KLONOA WORKS]

Hi,

is there away to unfold the object without effecting all UV ?

I mean in same object machine gun, I do some texture projection and there is place I need to do Unfold. But the problem is
when I do the Unfold, is Unfolding everything is there away to unfold only what I choose ?




here I do some Uv projection but I want this place to be unfold



I do the cut but it effect everything



so is there a way to unfold what I choose without effecting All UV ?
if there away it will solve me a lot

thanks

[benoit81]

Hello,
I'm afraid it's not possible.
even if you pin sample UV points they are affected by unfold operator.
It's a big issue with Unfold implementation, it should preserve at least pin samples.
Regards,

[Draise]

Maybe separating set polygons you wish to unwrap first, then once unwrapped, merge it to the parent geometry again combining the UV's or atleast having two UV sets. You then would paint each cluster with it's subsequent UV set. I'm not in front of SI, but I would attack that issue that way as a starter.

Or one could have two UV sets made within the same object, one with your first cluster unwrapped, with everything else collapsed. Then unwrap the other cluster with a second Unfold operator and do the oppossite. I would try that for a second try, once again I am not in SI to tell you either way works.

I wonder if one can merge UV's like merging objects..?

[benoit81]

that is true there is a workaround !
First Unfold your object. Then apply another projection (ie planar). Go to the UV editor, select the UVs you want to preserve. Copy thos UV to the tempory planar projection. Then Go back to the Unfold layer UV. You can re-unfold. Unfortunatly it changes all UV, but you can bring back the UV on the planar projection CTRL+C , CTRL+V.
You can pack again the whole thing and even delete the tempory planar projection.
The only real problem is that packing do not respect pin samples...