Firstly, thanks for the great library! Really enjoying playing around with it so far.
I have a question related to how Embree handles triangles that are aligned (and overlapping) in the same plane. To illustrate this please refer to the 2D examples below. In case 1, one triangle mesh (b) is enclosed within another (a) and one side is aligned and overlapping. In case 2, the triangle meshes (a and b) are side by side but share a side.