ZBrushCentral

Fill object in draft angle

ZBrush Usage Questions
#1

Hi there,
i have a question concerning the draft analysis. This is a great feature for me.
But when it comes to fixing demoulding issues, I wonder if there is an easier way to fill up the holes than using the move and he clay biuld-up-brush.
I would love to kind of “automatically” fill the gaps that appear, in the direction of my demoulding-angle.
Any ideas?
Best Christopher

#2

Hi @elvis

Can you illustrate the situation you’re referring to a little better for me?

Thanks!

#3

It’s a bit hard to explain, please take a look at the attached demoulding picture.
From the shilouette line (2) i would like to generate (or maybe extrude) a surface in the demoulding angle, resulting in a clean blend without undercuts (3), without having to tweak each undercut with a move or clay-brush.
Is this understandable? Is there a brush that can do this?
Best
Christopher

#4

Ok, well the Clay brush is the brush I would recommend for filling in spaces like that, but maybe you don’t want a brush based approach here in favor of something with more precision.

So what you could do instead here is to very precisely mask those areas, invert the mask by ctrl-clicking on the canvas, and then use the Gizmo manipulator to move or extrude the geometry in the required direction, through the surface of the mesh. If you hold down CTRL while moving the unmasked portion you will actually extrude the geometry rather than simply moving it. The two approaches may work better in some situations, but not others. For instance I think extruding the geometry would work well in the nostril cavity, but not as well on the exterior of the nose–in that case it may work better to simply stretch the geometry.

Once you have the results you want, Dynamesh the mesh to clean it up, fuse, and resurface the geometry. The exterior nostril may require a bit of polish or smoothing brush to touch up. If you lose any detail in the dynamesh process you can subdivide and project the detail back onto the mesh, but you may want to mask the changed areas to protect them from the projection from the previous state of the model.

Good luck! :slightly_smiling_face:

#5

Wow, thanks a lot for the input. I‘ll try that.
Best
Christopher