Obi Suit - Questions about cloth in characters

[Rettosukero]

- How to make mesh with thickness work good:

Use proxies:
http://obi.virtualmethodstudio.com/tutor...oxies.html
http://obi.virtualmethodstudio.com/tutor...cloth.html

By using a proxie, you can perform the simulation on the inner layer of your cloth, and make the outer layer just follow it.

- How can I smooth weights alongside mesh:

I assume you mean how to smooth particle properties: for this you can use the smooth mode of the particle editor's painting tools:
http://obi.virtualmethodstudio.com/tutor...iting.html

- I wish to have nice wrinkles in places where cloth curves:

Increase the "max bending" parameter of your bend constraints, or disable them completely:
http://obi.virtualmethodstudio.com/tutor...aints.html

- Will that backstop radius enough or I need colliders for stuff like pants:

If your cloth is always very close to the body (pants, shirts, etc) then skin constraint's backstop will be enough. For stuff like trench coats, capes, scarfs and such (that can move freely around the body), colliders can be a better option.

- How to make it not act like jelly

Increase the amount of constraint iterations (specially distance constraints) in the ObiSolver. If your setup allows it (i.e, you have at least some fixed particles), you can use tether constraints to completely eliminate stretching:
http://obi.virtualmethodstudio.com/tutor...aints.html

About proxies - Should I make new lowpoly mesh ? Especially that I want all pants animated for example? but some part will be just more skinned (like buttchecks) and some more simulated (like sleeves)