Film project about a mathematician : "Raymond"

Good morning all,
With the project of making a film about a mathematician, here is an essay for the main character. I still have a lot of questions about the modeling of the shirt and especially about its response to animation in sensitive areas of strong curvature. (Cloth, coupling to the frame, both ??).
Your suggestions are welcome.
This work was done with 2.90.1 and the rendering with cycles. There is no post-processing. Lightning is currently provided by a simple environment map.