Stager: Home stage face not staying aligned to grid

[artmaker]

Any suggestions? I can’t seem to keep the head/face of a bust sculpt aligned exactly with the grid in the home position. I want to be able to jump back and forth from the posed to the grid reference, but with the distortion/misalignment things get messed up when using the Home Stage with grids and global x-symmetry.

In the attached example the entire head portion (the part I need to keep exactly the same in the Home stage) was completely masked (or completely unmasked) when twisting tilting the head or shoulders with the gizmo. The target stage was reset after each rotation/translation/scale.

As you can see with the overlapping before and after meshes, the face of the modified bust (magenta) is slightly misaligned and distorted.

Thank you

ZB 2022.0.5
Mac OSx 11.6.3

[Spyndel]

Hi @artmaker,

I’m not certain I’m understanding the problem here. Stager doesn’t freeze the points of the mesh, it only stores the position of the bounding box. By your own reporting you have deformed the mesh (rotation, scaling, selective rotation). The mesh has been visibly altered from what it started as, and would not be expected to align perfectly with the original mesh. If the mesh is no longer symmetrical in the worldspace, this is likely to be the result of something you have done with your transformations.

The “after” face still seems mostly aligned with the original face except where the form has been clearly modified–the white areas are sections of the mesh that have been slightly displaced by your transformations, and are now peeking out slightly. Note that when two surfaces overlap in ZBrush, it can be completely random where one mesh might show through another, and depends on which mesh is active.

If you feel like I’m not getting the problem and something is not behaving as expected in ZBrush, please report this to ZBrush support, along with the steps necessary to reproduce the issue. We cannot provide technical support for ZBrush over the community forums.

Thank you!

[artmaker]

Spyndel, thanks – this explains a lot.

@Spyndel

Stager doesn’t freeze the points of the mesh, it only stores the position of the bounding box.

Do you know if Stager uses the simple geometric center of the bounding box for the translation, scale and rotation?

If so, I suppose the face’s home position can be preserved by keeping it inside and unmoved with respect to some dummy bounding features.

Thank you!