Here’s a render of Voxelnaut’s fire elemental, Salamandria! She was modeled in pieces in Qubicle Constructor and then put together in a custom program I wrote for making simple bone animations on voxels.
Part of the reason I like working with voxels is that it’s a lot more straightforward than modeling with polygons. The execution of adding or removing a voxel is simple, and you don’t have to deal with mapping textures to triangles. The barrier to entry is low! If you want to try it out yourself, there's a free voxel editor I’d recommend called MagicaVoxel.
Voxelnauts is a sandbox mmo currently in development; for more information, check out our Kickstarter!