People working with voxels consider VDB as an alternative to octrees. It's sparse volume format working with large voxel amounts. From Ken Museth & co at Dreamw

People working with voxels consider VDB as an alternative to octrees. It's sparse volume format working with large voxel amounts. From Ken Museth & co at Dreamworks Animations http://www.openvdb.org/documentation/doxygen/index.html http://www.openvdb.org/documentation/doxygen/index.html