For voxel worlds to become viable, content creation tools must migrate from polygons to voxels as well. In an earlier post I had mentioned 3D-Coat, a modeling software similar to Z-brush and Mudbox, but that works on voxels.
I decided to give it a try. It took me around four hours to create this model:
What if it was a robot or a car? 3D Coat has some tools for basic primitives, but I did not try those.
I remember the Flash editor managed to blend vector graphics with bitmaps. While it is all 2D, it has a nice hybrid system where vector primitives are rasterized into a group of pixels so its identity as an object is not lost. This allows to perform additional transformations to the object. A similar approach would work very well for voxels.