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Inner / Outer Polygons

ZBrush Usage Questions
#1

Hi there,

imagine the following problem: you extract a piece of cloth, for example a t-shirt, from an existing mesh. Fine.

Normally this piece is very thin. (As cloth should be :slight_smile:

What can I do, if I want to inflate the t-shirt in a fur jacket? (And, this is the problem, keep the INNER polygons close to the skin of my base mesh?)

I found the »mask-by-cavity«-button, but it solves my prob not quite, because there are often some polygons on the wrong side, which are affected too, and it is not possible to delete them from the mask, because the drawing tools work only on both sides)

Alternatively: is there somewhere a explanation for the »mask«-menue?

Thanks a lot for help,

Stephan

#2

I share your frustration, I have been in many situations like yours and I have not found a solution.

We can, I guess, hope that ZB3.5 brings better masking/selection tools.

#3

There are two ways you can do this:

  1. If the extracted mesh has thickness then the inner skin of ploys will be a separate polygroup from the outer skin - provided the mesh that was used for the extraction was a single polygroup (otherwise the extraction will reflect those groups which makes this method difficult). All you need to do is Shift+Ctrl+click on the inner polygroup. This hides all but that group. Shift+Ctrl+clik again and the visibility is reversed. With the inner skin hidden it will not be affected by any deformations.

  2. Switch on Backface masking in the Brush palette. You can then paint a mask (Ctrl+click drag) and then Invert the mask when done, leaving the inner skin masked.

#4

Hi Marcus,

I just found out, that extrusion creates polygroups, thats very helpful.

But: there is a button, I overlooked, the backface masking. Fine, thank you.

That´s, what I was looking for.

Greetings,

Stephan