The present disclosure relates to systems, methods, and computer-readable media to efficiently render movable three-dimensional objects within a virtual space. For example, systems disclosed herein may identify a voxel representation of a three-dimensional unit that includes voxel volumes associated with bones from a bone structure of the three-dimensional unit. The systems described herein may further maintain a voxel index including pixel data mapped to corresponding bones and voxel volumes for use in rendering pixels of a pixel space. The systems described herein may utilize raytracing to render an identified voxel representation based on pixel data from the voxel index. The systems disclosed herein may significantly reduce expense of processing resource over conventional rendering methods that involve transforming thousands of vertices of three-dimensional mesh models.