This is the first tutorial here about zBrush which I am learning currently. My first project was creating a simple tree with the ZSphere-tool and sculpting. I also made my first attempts in polypainting with ZBrush which I will describe here.
Let’s start by opening ZBrush and let the ZSphere be you current tool:
The ZSphere is a sketch-tool which means that you can build up your mesh with it but you do not sculpt in the details at this state, you just define the base-mesh. You can use the Draw, Move, Scale and Rotate tools when using ZSphere:
Using this methods I built up the basic shape for my tree. First I draw some new spheres and move them to new positions:
Always turn your model around the y-axis to prove were your newly created ZSpheres (Draw and Move) have been moved to in 3D-space. Finally I ended up with this simple tree:
Now you can choose Make Adpative Skin from the Adaptive Skin sub-palette which creates a mesh out of your ZShpere-objects. You can also choose a Unified Skin but Adaptive Skin creates most of the time cleaner meshes.
Use brushes like the Standard brush and Clay-Tubes brush with a grungy Alpha to build up some details for your tree:
Always increase the subdivision and resolution step by step when adding details to the mesh. At a level of about SDiv 6 you can add finer details with the Rake-Brush:
At this stage you can change to Polypaint to paint onto the tree:
Remove the Zadd and Zsub and just enable Rgb:
Set the color to a brown tone and fill the whole tree with it:
After you did this, you use can a nice feature to highlight edges of the tree and paint the carvings a bit darker: Enable the Mask by Cavity, set a positive value for intensity (about 25) and select a lighter color:
Inverse the mask (Ctrl-I) and paint with the lighter brown to your model. After that you set the masking to a negative intensitv (about -20) and paint with a darker brush.
After that your model should look something like this:
Now clear the mask and the result should be a cartoon-style tree like this: