Hi i am working from a tutorial but when i get to masking the cube he gets a clean straight line but when i do it get this:
where both have the same polycount so why does my mask look different. in the tutorial the person is using zbrush 4r8 and i am using zbrush 2019 if this helps
Hi Charlie!
The answer to your question is toplogy. Masking is constrained to topology, both in density and flow. Your toplogy there is distinctive, and I recognize it as the top/bottom end of one of Zbrushs’s parametric cube primitives from the Tool menu.
Denser meshes have smaller polygons, which allow for more accurate masking. However, you also have a flow issue there. That radial topology will always be apparent in any masking.
You could solve both issues by Dynameshing the cube to remove that topology and better distribute the polygons, as well as add density.
You could also ZRemesh the cube to do the same thing, then subdivide it up to the level of poly density you wish.
You could create a better cube to begin with. Once your parametric cube has been converted to a polymesh 3d object ( Tool > Make Polymesh 3d), go to Tool > Initialize and press QCube at the desired settings. This will convert it to a cube with much better distibuted square polygons.
Gizmo primitives will also let you construct a more useful cube interactively.
Thank you for the fast reply.
its just in the tutorial video the user was able to append a cube and mask a clean shape without having to do anything to the cube.
in the end i just used the initialise feature to make a clean cube.
it appears in the videos he does he is able to get clean mask with low poly models.
as mentioned i think he is using an older version of zbrush.
Obviously I can’t tell you exactly what’s going on in the tutorial you’re referencing without seeing the tutorial. The concept I just explained is the same in any version of Zbrush, however.
If the tutorial author was using the same primitive you are, it may be that they masked a side where the polygons were better suited, rather than the pole ends. And as you now know, there’s more than one type of primitive in Zbrush. Perhaps they were using one of those.
Fair enough
actually now that i think about it you might be right about using the side of the primitives as that makes alot of sense to me
thank you very much
