hi all!!
is it possible to smooth converted track from rfactor to nkp??
i just converted some track but its to bumpy on some parts.
do i have some option i 3d max??

It's possible to smooth bumps in 3ds Max, although I've never had to before (so I only understand the basics). I don't think there's a tutorial showing you how (it would be really good if there was).

I'll try to explain (difficult for me in English), moreover it's long time I have no time to work on Max.

Thanlks to f.gek (Bessie!) for all this instructions, gave me some time ago to help me to smooth my work.

Basically

1) select a sector of the track (should be an editable poly)
2) ALT+Q to switch in isolation mode
3) Vertex mode: select all vertex and WELD (the number of vertex will decrease)
4) Edge mode: REMOVE all edges that are not orthogonal (more or less) to
try to obtain a "regular" squared wireframe
5) REMOVE all free (not connected vertex) that should lay on some edges due to the edge you have removed on point 4)
6) select the first edge
7) Ring (you should see all parallel edges become red. If not check if
there is some isolated vertex near the point where the chain is
interrupted)
8) Connect
9) Repeat 7 and 8 to have at least 4 "lanes"

More or less DONE!
Then you have to check if there are holes between grass and track.
Eventually correct moving the vertex in an appropriate way.

Hope it helps, let me know!

thank you Marco

Only seems to work with certain bumps.

This procedure, from my point of view, shouild be used without exception when converting tracks from other sims (at least for ISI based).
This procedure smooth the bumps due to "poor" (for netkar) track meshes, not for big "geometric" bumps (because really found on the track or due to "errors" in modelling)
If the bump is due to an error and not wanted, you should try another procedure (friendly called "excavator") that can (sometimes, but not always) help you.
Unfortunately I don't remember that procedure since I needed to use it only a couple of time (I remember for sure to have used in an isolated poit of BH of Gary).
Perhaps f.gek could help, or if you know a procedure for other bumps you could share.
Anyway, if a track is really poorly modeled there is nothing you can do automatically in Max and the only solution is to rebuild the part of the track.

NetKar seems to be way more sensible than other sims to mesh smoothing.