ZBrushCentral

UV Master and Hard Surface Modeling

ZBrush Usage Questions
#1

Hello,
I am relatively new to zBrush. I have been working on buildings using hard surface modeling in zBrush utilizing the zmodeler brush. The problem is when I go to unwrap in the UV Master the resulting UV Map has edges that are not straight. For instance attached is a screen shot of a cube I unwrapped using Polygroups and control painting the edges. Notice that the edges where the green seam meets is curved when flattened. I have creased the edges and not creased the edges. How do I correct this to make the edges straight on the UV Map?

Attachments

image.jpeg

#2

Not exactly sure myself, but you should check out this #AskZBrush video.

https://youtu.be/tl_FOvZOqHU

You may want to submit the question on Twitter with the #AskZBrush handle too.

#3

Thanks, I will send a question to ask zBrush.

#4

The plugin is designed for organic modeling. The problem is that one island is not flat and it treated as a organic shape, as with pelt tool in Max.

You can get straight UVs if the UV islands are flat. You could achieve this creating polygroups by normals in the tools->polygroups menus and then using UV master with the option polygroup active. This will create perhaps more islands that you want but they will be straight.

Also you can reorder the islands in the flat view of the UV master. It will accepts any edition tools that doesn’t add verts and is flat. You can even reorganize the islands and weld the verts. Simply do it in a backup to avoid losing the UVs.

#5

@Altea,
I have used polygroups group by normals with the cube and this seems to work, but when I do this with a complex model like a building it does not work.