fonpaolo:
"I have a question about dinamic dresses, I made some in hex, but when imported in poser, and simulated, they are divided in some parts during simulation.
I have to say that the dress is made of more than a mesh, but exported and manipulated as a single object."
Ans: - The mesh (of the cloth) must one single entity, all vertices connected to each other. The cloth room doesn't realise that certain parts should not separate. Weld the various bits together before exporting from Hex. And by "weld", I mean vertex target-weld, not just "weld objects". Those vertices MUST be connected. Tiresome, but true. Next time, try making the "separate" parts via extrusion etc..

"I've found some free dresses with buttons etc, and they are simulated very well!!!
I only clotify, not soft decorated etc."
These are (probably) props (.pp2 files). When dynamic cloth is saved as a prop the "soft/rigid etc" groups are saved with the cloth and automatically applied when you clothify.
Tip:- When making clothing (in Hex) which has buttons etc, these can be separate objects (much easier than trying to extrude them). Give anything which needs to be rigid-decorated a separate material zone (even if it's the same colour as the cloth). The same for any other groups. Then, when you clothify you can group the rigid stuff by using "add material" in the group editor (rather than tiresomely selecting all the vertices...)

Cheers,
Diolma