How to make walls be covered with tiles with different shading? I am new to blender and already searched on google but didn't find a solution. I would like to create a round ball (and remove the lower half part but I know how to do this) and fill the face of it with flat objects like squares or triangles...

(triangles will look like:

\/\


so two triangles build one square)

Here is a picture from cerebro from the x men films. It is build of squares. I would like to achieve something like this:
An icosphere is a triangulated sphere.
Subdivide for more faces.