In this tutorial I will show the dynamic topology feature of the sculpting mode in Blender. Dynamic topology means that the geometry is created on the fly when you are sculpting. If you enable dynamic topology for your mesh, the faces are created for this areas of your model you are currently working at.
Let’s start with a simple base mesh that has a very low polycount:
I enable another MatCab which in my opion gives me a better look and feel during sculpting:
Then I change to Sculpt Mode and select the Sculpt Draw brush:
After that I enable the dynamic topology feature with a low detail size (the lower the detail size, the more detailed is the sculpting):
I dig some holes into the mesh now (holding Ctrl-key down) and smooth it a little bit (holding the Shift-Key down). This is how the sculpting looks like:
And as you can see when you change to Edit Mode, Blender has created a lot of faces were I carved out the holes and used smoothing:
This dynamic tessalation is a very useful feature in Blender to add geometry only for parts were you need it.