problems with retopology, UV and displacement map

[system]

Hello everybody!

Im just a beginner in zBrush and i have a big problem .
Epecially the workflow of re-topologizing and UV unwrapping. so
let me explain my workflow:

1. I sculpted something (7 Subdiv.)
2. retopologized it
3. Exported the basemesh (topologized) und subdivision 7 (topologized) as .obj
4. “UVed” the basemesh with an external programm (UV-map is ok!)
5. Opened finial basmesh in zBrush
6. Subdivided the Basemesh 7 times
7. 7. subdiv. replaced by the exported higpoly obj
8. Back to the first subdivision level and tried to create a displacement map
   => failed! There is only a grey map (Only one grey, there is no information on it!)

Can somebody tell me, what went wrong? I hope you can understand it and sorry for my english
It would great if you can help me.

thx Cédric

[aurick]

Here’s what you should do:

1. Sculpt and retopologize.
2. Go to level 1. Save the model.
3. Export your OBJ and do the mapping. Save as another OBJ.
4. Return to ZBrush and import the new OBJ. It’ll replace the current level 1 and update the UV’s.
5. Turn on Tool>Geometry>Cage
6. Create your displacement map. Export both it and the cage.

[system]

OK, thank you very much!

But there is the next problem:

[[ATT=]Unbenannt-1.jpg[/ATT]](javascript:zb_insimg(’’,‘Unbenannt-1.jpg’,1,0))

I can’t import my new UVed obj. Is that because of some of these options? Do i have to push a button?

Cédric

Attachments

[aurick]

It’s because your model is still connected to the ZSpheres. You need to skin the model before you can export and UV it successfully.

[system]

I imported the new obj and pressed “cage”. That’s the result:

[](javascript:zb_insimg(‘102222’,‘dg%20Kopie.jpg’,1,0))

It has the identical number of points, nothing modified…
What’s the problem? :rolleyes:

Cédric

[system]

yes ,both of the meshes have the identical number of points, nothing modified,BUT the order of the points(maybe called point ID ) maybe modified

i have try to unwrapped the mesh in maya many times,but always failed when import the UVed mesh into zbrush,Finally i find if unwrapped the mesh in UVlayout,it will be OK

[system]

It works wit Roadkill!
But not in Cinema 4D’s Bodypaint. does anybody knows why?

[aurick]

It doesn’t work in C4D because C4D changes the point order of the model. You cannot use C4D’s native importer/exporter until Maxon addresses that issue.