John,

So here's my latest attempt at checking for copy protected textures: After I walk through all the meshes and identify the copy protected meshes using .MeshVertices(), which works, I then create a simple triangle mesh, and then walk through all the textures in the scene, applying each texture to the triangle and then calling MeshVertices() to see if it's protected.

But, my bad, the triangle of course is NOT copy protected, only the texture, so I'm able to access MeshVertices(). So, in fact the object you downloaded last night, would PASS the MeshVertices() test, even though there was a copy protected texture on it.

Back to the drawing board trying to design a test for textures. :-(