Earlier this year, I tried my hands on the 3D modelling software by Autodesk, Fusion 360. I self assigned myself to create some custom 3D chess pieces with the software. I only had one constraint. None of my chess pieces will have any curved surface. The exercise let me to create the following chess pieces. I tried to maintain the basic shape of the chess pieces and slowly extrude and removed cuboid out of them to add more details.
After nearly 107 iterations I finalised the form of these chess pieces and decided to 3D print the rook. Following is how the 3D print turned out. I intend to get this all 3D printed and create a chess set out of it.