Interface BvhThreeSource

The geometry group, or -1: for a mesh with one material, and for a folded multi-material mesh (multiMaterial: 'triangles'), which holds every group (threeGroupOf gives a hit triangle's).

The instance of an InstancedMesh or BatchedMesh, or -1 for a plain mesh.

The group's materialIndex, or -1 (see group; threeMaterialOf gives a hit triangle's three material).

Position of this instance's mesh in BvhThreeScene.meshes.