finding which parts of a mesh are hidden

[menashesoffer]

suppose I have a mesh, (triangular mesh); I need to know which parts (vertices) of the mesh are hidden (obstructed by other triangles) from a specific point of view.

this calculation must be implicitly done during rendering, so it is somewhere inside and optimized.

the question is if and how I can use the open3d API to get that information.

thanks