ZBrushCentral

Can't map this item with UV unwrap

ZScripting Help
#1

Hello,
I’m trying to use UV Master on a item but it seems it does not like it and I don’t know why.

The original model was created with ZSpheres, I then exported into Maya for some editing and imported back as OBJ, I painted and sculpted it and created a GUV mapping but had some trouble with the displacement on some parts (in my rendering application), then UV Master was released so I thought I should try it rather than the GUV mapping to solve my displacement rendering issues.

Well, it seems I can’t map it with UV Master and I really don’t know why.

My steps:

  • I load the sculpted and painted tool with no UVs.
  • work on clone
  • click unwrap (I tried both with and without symmetry)
  • click “new from uv map” to check the map and that’s the mess I get

Image 1: high res model painted and sculpted
Image 2: uv map generated on clone
Image 3: the low res model I’m trying to unwrap

Any idea?
Thanks!
Aery

Attachments

treehires.jpg

treemap.jpg

treelow.jpg

#2

Did you copy the UVs over to the original mesh after working on the clone?

#3

Can you share your model for testing it? (I can give my email by pm if you need)

#4

No, I didn’t, I didn’t see any use about copying that UV to the original object.

Hi there,
I could but do you have any clue?
Because I’d like to understand/fix this myself :).

Aery

#5

Well, since you said you were working on the clone. It makes sense to transfer the new UVs back to the original and then create the diffuse.

#6

Hi Norman, the point is the UV is completely messed up, I can’t use it as it is.
I have to understand why it generates such awful UV, I can’t work with it.

You see, the image 2 shows the UV, it doesn’t look like a usable UV, does it? That’s what I need to fix.
UV Master seems to just dislike this object.

Aery

#7

so you use maya too, excellent.

  1. export the base lvl to maya and clean it up, by running the clean tool.

  2. give it a planar projection in Z axis, then using edgeloop selections cut the uv edges and move the uv shells into the 0 to 1 space. No overlapping Uvs!

  3. Import back to zbrush and use the unfold feature of uv master to flatten the shells with a better poly to uv ratio.

Usually I will delete all 3D layers and morphtargets then save out a new version of my tool before moving onto the uvs or map generation.

EDIT: if you want to do it entirely in ZB try using polygroups to break up the model (not subtools) and try running uv master on each piece