SurfaceMesh<PositionMaterialNormal> surfaceMesh;
CubicSurfaceExtractorWithNormals<LargeVolume<Material16> > extractor(m_pVolume, region, &surfaceMesh);
extractor.execute();
createIrrlichtMesh(surfaceMesh);
//...

// createIrrlichtMesh method:
const std::vector<uint32_t>& indices = surfaceMesh->getIndices();
const std::vector<PositionMaterialNormal>& vertices = surfaceMesh->getVertices();
   
irr::scene::SMesh* smesh = new irr::scene::SMesh();
irr::scene::SMeshBuffer* buf = new irr::scene::SMeshBuffer();
smesh->addMeshBuffer(buf);
buf->drop();

buf->Vertices.set_used(surfaceMesh->getNoOfVertices());
buf->Indices.set_used(surfaceMesh->getNoOfIndices());

for(uint32_t v = 0 ; v < surfaceMesh->getNoOfVertices() ; v++)
{
   const PolyVox::Vector3DFloat& position = vertices[v].getPosition();
   const PolyVox::Vector3DFloat& normal = vertices[v].getNormal();
   
   buf->Vertices[v].Pos.set(position.getX(), position.getY(), position.getZ());
   buf->Vertices[v].Normal.set(normal.getX(), normal.getY(), normal.getZ());
   buf->Vertices[v].Color.set(255, 255, 255, 255);
}
 
for(uint32_t i = 0 ; i < surfaceMesh->getNoOfIndices(); i++)
{
   buf->Indices[i] = indices[i];
}
   
buf->recalculateBoundingBox();
//.....

m_pVolume = new LargeVolume<Material16>(&VoxelWorld::loadPage, &VoxelWorld::unloadPage, VOXEL_PAGE_SIZE);
m_pVolume->setMaxNumberOfBlocksInMemory(4096);
m_pVolume->setMaxNumberOfUncompressedBlocks(64);
m_pVolume->setBorderValue(0);
Region reg(Vector3DInt32(0,0,0), Vector3DInt32(64,64,64));
m_pVolume->prefetch(reg);