ZBrushCentral

Z4 ZSphere skinning question. - Answered

I have a new problem with Zspheres, they are suddenly only drawing one half of them selves and the resulting mesh is useless.
One Zsphere results in one half of a sphere that can only be seen from one side, two Zspheres results in a pinched off object that is missing one half of the root end.
Has anyone else had this happen?
I have tried everything I can think of including rebooting but no luck.

Cheers, and thanks!
Mealea

Half-sphere skin for a single ZSphere is normal for the classic skinning (and mannequin). Please check the adaptive skinning mode and make sure that you did not activate classic mode by mistake.

Doing that now, thanks!

nope… thats not it…

any other ideas?

I have hit the INIT ZBRUSH thingy in preferences, tried the classic skinning thing and nothing works, this happened once before but restarting Zbrush fixed it, now Init Zbrush, restart Zbrush completely and all that including a reboot did not do the trick…
Quite perplexing, and its doing it sort of with two Zspheres as well, just slightly different.
If a picture would help I can make one, its not much to look at however, its seriously messing with me however…

Yes, please post images of the steps you take so I can be of help.

Is this in Z4 or Z4R2 ?

Z4, and the steps are something I do all the time:

Open Zbrush.
Close light Box.
Maximize the Zbrush window.
Create one Zsphere.
Hit Edit.
Create a second Zsphere.
Select move or hit A as needed.

Here is the result(s):

Single Zsphere:
SingleZsphereProblem.jpg

Two Zspheres:
DoubleZsphereProblem.jpg

And a screenshot of the single Zsphere from above:
ZsphereProblemScreenshot.jpg

I should add that placing a third Zsphere seems some how to fix this… and also that this is a new problem.

What you see is normal. You should have no problem adding ZSpheres and getting a proper skin.

This is EXACTLY how it was with Z4 as well… and in fact with every version of ZBrush since ZSpheres were first introduced.

The root ZSphere is a placeholder. It does not actually contribute to the model’s geometry. If you only draw that one ZSphere you will get a half sphere when you preview it.

When you add a second ZSphere, that’s where geometry starts truly being calculated. However, if that second ZSphere is drawn off center then the resulting mesh will be skewed. For best results you always want to try and draw the children exactly on the parent’s X/Y/Z axes. Using symmetry helps with this, as does holding down Shift while drawing the root so that it’s squared to the canvas.

FYI, I just did this with both 4 and 4R2. I created an identical pair of ZSpheres with the child being drawn exactly on the root’s Z axis. (At the point closest to the camera.) Both versions gave me an identical preview. I see no changes between 4 and 4R2 in this area.

normal?
I’m confused, I do this all the time, I make a 2 Zsphere sort of tube thingy and start sculpting from there when I am doing head study’s or some times other things … I discovered that more Zspheres prevents me from having enough polygons for things like ears if for example I add shoulders.
I might even have a video of that process…
I can look if you like, this just started and dident used to happen…

I’m totally confused, I believe you but but but…
Ok I will dig and see if I can find the video I made…

Ok…
I will now have my self dragged off before a firing squad.
You are both right. When I use the mouse to create a Zsphere I get one Zsphere, when I use the tablet it seems I often end up with two and especially when I’m creating the first one, it seems I somehow make the root Zsphere and a second tiny one that I cant see, then add the second (which is in fact the third). Still I could swear I have worked with one at a time and two at a time but who knows all thhis waiting is making me nuts.

Thank you both for the help, and sorry I am an idiot!