i would like to know how to export and obj from houdini to Zbrush and the general workflow thx

in general it goes like this:

0. make uv map
1. export model from houdini as an obj file.
(in geometry level select your geometry, right-click -> save geometry as, then choose obj)
2. import obj to zbrush and sculpt
3. generate displacement maps
4. export maps and obj
5. import obj in houdini
6. setup displacement shading network in houdini
7. apply shader to model
8. render

If it's more or less straightforward depends if you're more or less familiar with houdini.

You can find good tutorial about setting up displacement here (odforce):
http://forums.odforce.net/index.php?showtopic=8053 [forums.odforce.net]

thank you very much dude.