ZBrushCentral

import mesh from Max - points order changed

ZBrush Usage Questions
#3

I’m having a similar problem exporting an .obj from zbrush to max. I can import low levels but anything semi-high poly just seems to catch max in a loop. I can bring it into silo and re-export it as obj and bring in up to mid level geometry but high res stuff just poops out. :frowning:

zbrush 3
max 8
silo2 Beta

#4

So has this issue been resolved yet? This is huge, not being able to tweak your low poly and import it back into ztools… I’m basically stuck for now…

#5

i cant reproduce your “bug” can you please put step by step what you are doing?
just to help!
Andreseloy

#6

Hey andreseloy… Thanks for the reply. It’s pretty simple. Export the low division model into max, tweak, and then import it back to its ztools. This causes a program crash with no explanation… I just tried it with ZB2 and it works fine there…

#7

i follow your steps and work fine.
Are you importing the ztool or the object while you have select the ztool? I made another test having one active ztool and is remplaced with the other i tweckead in 3DMax and was remplace succesfully.
can you send your object (if not problem for you?)

Andreseloy

#8

Alright, then you’re special :slight_smile:

But I just figured out the problem. First off, when importing the OBJ file, uncheck “unify”. Once you do that, the normals will be flipped rather than the whole mesh being black, so I didn’t need to reset xform. All I needed to do was to reverse back the normals before exporting it back to zbrush… I swear I’ve done that before, but whatever

#9

I’m having a similar problem. I imported a .obj and sculpted without checking on the UVs which were exported incorrectly from max.
(Apparently when I exported from an editable poly it triangulated the uvs and doubled them over but if I export from an editable mesh it exports the uvs properly.)

Now zb crashes upon import, though. Am I doing something dumb? Any suggestions?

#10

Sonn - I’ve tried the unchecking the Unify button and stuff…but it gives me mixed results. Sometimes it still crashes.

The problem is the iflipY and eflipY. If they are on, you cannot re-import the lower obj. It’ll screw up.

Just turn them off and it’ll work fine. You’ll just have to live with flipping the model in the viewport. This is the easiest way for me.

Hope this helps.

#11

Thanks for the replies guys, that does seem to sort it out.

Cheers
Ged

#12

Thanks redonix76, I’m unchecking those, just in case.

#13

Also, another thing. When importing meshes from zbrush into max, I make sure that “obj smooth groups” is unchecked and smoothing group is set to 1. I usually end up destroying the higher divisions in my ztools if I don’t have this unchecked.

#14

Wow, thanks guys, I got my symmetry back. :smiley:

Sonn> Is it coming from Max to Zbrush that your mesh destroys on? Because it did that to me on my first test before reading your last message. Your message though reads as if you’re taking it from zbrush to max though but the option you’re talking about is in the max .obj export options.

Thanks again guys!:smiley:

#15

importing the mesh back into Zbrush ruins any hi level divs if I don’t have the right smoothing grou. It’s on the obj import options in max9… I basically have it imported as a single object, “rotate model”, “texture coordinates”, and “normals” are all checked. Unify is unchecked, and “obj smooth groups” is unchecked and set to 1. Basically whenever I’m importing or exporting an obj file, I make sure that the smooth group is set to 1,

#16

Alright, I’m still having that issue where the higher divisions explode upon importing the low div mesh into zbrush. This is how I got it working… I import the obj file to max, export it, import it back into zbrush… Doesn’t work, I undo, import the same object that I exported from max back into max, and export again. Import back into zbrush and it works… Someone should verify that cause this is just weird…

Here’s my post from another thread that might explain it a little better:

"Alright, as of right now, this workflow is working fine for me. This is how I got it working… I import the obj file to max, export it, import it back into zbrush… Doesn’t work, I undo twice in zbrush, import the same object that I exported from max before back into max again(don’t have to export from zbrush), and export again. Import back into zbrush and it works… Someone should verify this cause it’s just weird…

EDIT: yep, it works. I did this numerous times and it seems to be working for me… and every time, the first import destroys the higher divisions… Make sure to do all of this with one obj file…"

#17

Hi,

I have tried all your directives and zbrush replaces the mesh with the imported obj, but when steping up through the higer divisions the mesh blows up, I don’t get it! what am I doing wrong?:cry:

Cheers,
p

#18

It may be a scaling issue I have solve some issues I had with exporting to different apps by making sure the size stays the same as the original Zbrush export.

#19

Hi garycrump!

Thanks for answering. I don’t think it is a scaling problem, the mesh is as far as I can tell just the same. I have attached a sample of what the problem looks like.
I really appreciate any help I can get on this!:cry:

I have fixed the import problem itself from all the excellent advice in this thread, but it is the subD issue that really makes me flustered!

thanks again
p

sample-of-problem.jpg

#20

What is your exact workflow?

For me its -

create base mesh in maya
import obj into zbrush.
divide and sculpt.
export lowest level cage with tool-export-mrg(u.v.s) on
import obj into maya
edit and export.
reimport lo level cage into zbrush

And as long as the flip options in prefs are turned off this works fine for me.

Hope this helps
G

#21

Hey there ged wright!

My work flow is almost the same but with Max.

Base mesh in max export to Obj.
Import to ZBrush divide and sculpt.
Export to Obj. at lowest subd.
Import Obj to Max and edit(pose)
Export.
Import to Zbrush works fine, then stepping up through the levels it breaks!

I have followed all the steps that sonn wrote about which solved the import itself but not the reconstruction of the subd levels.

Still a problem but thank you for answering/ much appreciated

p

#22

If the scaling is off by even a small amount it will explode.

The basic solution is here.

http://www.zbrushcentral.com/zbc/showthread.php?p=368949#post368949