You can sculpt 3D objects with a set of brushes. Easiest way to explore the feature is to create a 3D primitive (e.g.: Sphere, Plane) and click on “Smooth & Edit”. Increase the Subdivisions for a smoother sculpting result. Sculpt is found on the toolbar once an object is in edit mode (access it from right sidebar when an object is selected or simply double-click the object).
The Radius and Strength of the sculpt brush can be adjusted from the right sidebar. Adjust it based on your sculpting needs.
Following sculpt brush types can be used to manipulate your object:
Elevates the surface from starting point by clicking and dragging. Hold ⌘ or Ctrl to push the surface from starting point.
Click and drag along the surface to elevate it along the path you draw. Hold ⌘ or Ctrl to push the surface.
Similar to draw but it has a flat base based on the set radius for the brush. Click and drag to elevate, hold ⌘ or Ctrl to push the surface.
If your sculpting is rough the Smooth brush makes the surface more even and smooth.