it will be great but i'm trying to do it on my own.
I have problem to find an order to group faces. If the order is wrong it can't become an manifold solid.
Any suggestion ?

Ok, thanks.
But don't you think that this method would be too long/loud for user ?

Hi,
I'm looking for some help. I Would like to code a little ruby script to identify all closed space in my model (like solid group).
I don't see any way to do that without test all faces and group them each other and test if group is solid.

I have done 3 pictures my problem, hope u can give me some advice.
Thank you in advance.