Modifying UVs in separate application, then reimporting into Photoscan

[vchmiele]

Once, I finish creating hi-poly geometry in Photoscan, what is the process for updating UV's for better texture projection.

If I understand the process correctly, I can export the Photoscan mesh as an OBJ, retopo, layout new UVs, and project hi-res details (I am using Zbrush). Then reimport the new mesh back into Photoscan before I create the texture.

Any tips on this process would be helpful!

Vince

[WillMacNeil]

It's pretty much exactly as you described it. Be very careful not to move your model out of position or it may not line up when you re-import it. Be sure to use 'keep UVs' once you start applying textures back in PhotoScan.  I've found I get better texture results if I only apply one image at a time and then export it.  Then I can blend a few of them manually in Photoshop.

If you don't work with UVs regularly, I'd suggest using a human readable UV layout - not a tiled one.

W

[vchmiele]

Great, so as long as I don't reposition the exported OBJ from Photoscan, the world space coordinates will remain constant. That's what I assumed...

Thanks

[pagan]

Hi
I have performed this procedure, however when I re-import into Photoscan in order to apply the texture I get some aberration to the image(top left corner and right sight of the arch).
I have tried to position the low poly object as much as possible on top of the high one.(you can see the first image which is not my best try because I have a better ones).
I have used keep UV and I have chosen mosaic because average gives me a very blurred image.
Any help on how to optimize this process?
Many thanks
Nic