How to create a Sparse Voxel Octree

Dear UE forum,
I am very new to the game engine development/usage and need a few hints where to start.
I have developed some 3D modeling and reconstruction algorithms from stereo or multi-view cameras and have all my geometry in sparse voxel octrees.
This enables me to optimize and to update the geometry very efficient when new measurements arrive.
So far…

Now, I would like to render the same sparse voxel octree in the unreal4 engine.
Could someone give me a hint where to start?
Are the any importers for OpenVDB oder any API docs, which allow me to fill and update an octree while it is being rendered?

Thank you very much in advance!

Eugen