hi, today download some car model and wanna render it, but there is 3formats - .obj, .fbx .dfx. in maya it works cool, all matereals are in the place, but i how import it normal in houdini with materials? and when i import in houdini - car is one mesh, and when in maya - there a lot of meshes. this think really disturb to texture

Check groups. Middle mouse button on File node and you'll see what groups you have. Than use Material on specific group.

ou, there i have 56 groups, but how i can devide it?

Use a “Delete SOP”. You can choose ‘Delete Selected’ or ‘Delete Non-Selected’.

In the group option, you can use name like:
wheel* > select all groups starting with name ‘wheel’
*wheel* > select all groups containing name ‘wheel’
* ^wheel > select all groups except ‘wheel’

Documentation of Pattern Matching:

http://www.sidefx.com/docs/houdini11.1/expressions/_patterns [sidefx.com]

and one new problem. at last i upload fbx mobel, but there is only body of my car, no another groups