ZBrushCentral

odd UVs / importing a low rez with UV tweaked

ZBrush Usage Questions
#1

i started my low rez in maya, i UV’ed it, imported to zb, everything was fine; the UVs checked out fine…
after 3 zb subdivision sculpting i decided to slightly tweak my UV [the area at the top of the head,
now when i re-import my low rez back into ZB, the UVs are all messed up. :frowning:
the tweaks i did in maya was pull the very middle to UV and grid snap it to completely align in the 1-1 uv space, thats all and one relax operation on neighboring uvs.
but in ZB, when i do a UV check i can clearly see that zb thinks i have ovelapping UVs.

But the weird thing is that re eporting an obj of my mesh from zb to maya, the UVs are layed out fine.
any ideas?, i dont want to keep sculpting and have problems later on…

#2

I suspect that there is a problem with the settings that you’re using to export from Maya. ZBrush is NOT changing the UV’s.

Have you looked at the tutorials for importing and exporting with Maya found in the FAQ>Other Software>Maya part of ZBrushCentral?

#3

this is not my first work with zb to maya.
this problem only showed up after i [barely] changed the uvs in maya
the weird thing is when i export the same obj that has the meesed up uvs from zb, the uvs look fine in maya,
i also did a test render with a disp map, and there is a huge hole at the top of the head, almost like a dent.
…

#4

"the tweaks i did in maya was pull the very middle to UV and grid snap it to completely align in the 1-1 uv space, thats all and one relax operation on neighboring uvs. "

Have you tried not doing the relax operation and see if there is any change or difference? A suggestion to possibly eliminate something or narrow down where the problem might be occuring. Am not sure what the relaxing thing is in maya…but maybe it is causing this? I don’t know but perhaps eliminating that step will yield a different result…perhaps for the better?

#5

well, im don think the realx can be the problem, because i did a lot of the relax operation in the initial UV set up b4 i imported to zb.
anyhow, while the UVs still look messed up in ZB i re did another test and it looks fine.
but its still has the red UV marks in ZB, but in maya they look fine. as long as it renders correctly, i have no problem with it.