http://creative-co.de/hemesh2embree/

This isn't a proper library.  It's just a .PDE file you throw into your sketch directory to get access to a few utility classes that allow you to export Hemesh meshes to the format that the Embree renderer expects.

I also customized the Embree renderer to allow for periodic exports during rendering using command line arguments. 

more info on the renderer at  http://software.intel.com/en-us/articles/embree-photo-realistic-ray-tracing-kernels

If you aren't familiar with Hemesh by @wblut you are missing out.  Check it out here: http://hemesh.wblut.com

If you have any questions or comments you can find me on twitter @billautomata or just leave a message here.

I also have more examples I have made on Flickr.