UV's from maya mess up in zbrush

Toke1985 · 12-01-2008, 09:13 AM

hello GA

I am working on this knife here and i am trying to optimise the UV's with having more opbject on one. So i start unwrapping in headus UVlayout and then take them to maya so i can make all my objects fit on one UV map.
My problem is that when i use headusUvlayout UV's in zbrush the map gets perfact but when i have importet the Uv's to maya first and moved them around they mess up when i try to make the normal maps???

any answers anybody

1 picture is with the uv's from headus UVlayout.
2 picture is after i moved the uv's in maya to optimise it.

snoop · 12-01-2008, 08:32 PM

From what I know about zbrush and maya, I'd say the uv's are getting flipped (vertically). Whenever you do anything in zmapper, make sure you flip the image vertically.

Toke1985 · 12-02-2008, 02:59 AM

Thanks for the answer!!
But for what i can see on the map, after it is generatet it is not the flipped Uv's because it is all mess up just a bunch of BIP BIP....

so if anybody else has and idea im open..

workspeare · 12-02-2008, 04:08 AM

It could be that the Maya OBJ import or export is messing up the vertex ordering. Check the various options in the import/export dialogs ... turning one of them on or off might help. Sorry I can be more specific, but I'm remember back a few years when I had a similar problem.

Toke1985 · 12-02-2008, 04:43 AM

okay i try to look into that! see if i find anything!!

Toke1985 · 12-02-2008, 08:59 AM

workspeare you i idea dosent seem to work sadly. but it found out that is it maya's that mess up the uv's because i can not do normal maps in maya either makes the same mess.

im using Maya 2009 but tried to save the OBJ in 2008sp1 don't know if it has anything to say?

RVMS · 12-02-2008, 10:32 AM

when you exported the .obj did you make sure to turn off all of the options?... hahaha, sorry workspeare, I guess I am guilty of rushing through...

Toke1985, try to re-export the base mesh and turn off all of the import/exports that workspeare was talking about... I am not sure if you'll have to sculpt it again or not in zbrush... My best advice would be to re export it with all the stuff turned off, do some quick sculpting in zbrush just so that it is noticeable... and then apply the normal in maya again.

Toke1985 · 12-03-2008, 04:54 AM

thx RVMS for the answer but that did not help either.
but i found out that i just needed to reproject all the detail over to the maya meshes insted then i could get it to work and found a way to project my poly paint over to i i could use all my zbrush data.

12-02-2008, 10:32 AM	#7 (permalink)
RVMS New Artist 6 - 0	when you exported the .obj did you make sure to turn off all of the options?... hahaha, sorry workspeare, I guess I am guilty of rushing through... Toke1985, try to re-export the base mesh and turn off all of the import/exports that workspeare was talking about... I am not sure if you'll have to sculpt it again or not in zbrush... My best advice would be to re export it with all the stuff turned off, do some quick sculpting in zbrush just so that it is noticeable... and then apply the normal in maya again. Last edited by RVMS; 12-02-2008 at 10:37 AM.

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12-01-2008, 08:32 PM	#2 (permalink)
snoop Freelancer 7 - 2	From what I know about zbrush and maya, I'd say the uv's are getting flipped (vertically). Whenever you do anything in zmapper, make sure you flip the image vertically.

12-02-2008, 02:59 AM	#3 (permalink)
Toke1985 Game Art Student 15 - 1	Thanks for the answer!! But for what i can see on the map, after it is generatet it is not the flipped Uv's because it is all mess up just a bunch of BIP BIP.... so if anybody else has and idea im open..

12-02-2008, 04:08 AM	#4 (permalink)
workspeare New Artist 1 - 1	It could be that the Maya OBJ import or export is messing up the vertex ordering. Check the various options in the import/export dialogs ... turning one of them on or off might help. Sorry I can be more specific, but I'm remember back a few years when I had a similar problem.

12-02-2008, 04:43 AM	#5 (permalink)
Toke1985 Game Art Student 15 - 1	okay i try to look into that! see if i find anything!!

12-02-2008, 08:59 AM	#6 (permalink)
Toke1985 Game Art Student 15 - 1	workspeare you i idea dosent seem to work sadly. but it found out that is it maya's that mess up the uv's because i can not do normal maps in maya either makes the same mess. im using Maya 2009 but tried to save the OBJ in 2008sp1 don't know if it has anything to say?

12-03-2008, 04:54 AM	#8 (permalink)
Toke1985 Game Art Student 15 - 1	thx RVMS for the answer but that did not help either. but i found out that i just needed to reproject all the detail over to the maya meshes insted then i could get it to work and found a way to project my poly paint over to i i could use all my zbrush data.