After quite a lot of trying, and learning to use Blender, a great open source 3D rendering package, I finally managed to create a Duke image based on a DXF file from the open source Duke project.The rendered image is on the left.
This means I can use it for other logos and movies that I create with Blender. Soon I will use it on the wamblee.org website which recently also got a style update. The good thing about it is that in this way I can use the Duke image inside any 3D model I want. In particular, it also contains a rig but haven’t tried that yet. With some luck I should also be able to create Duke animations from that.