Was 13 steps at first, down to just 4 now:
[*]Export map to OBJ using GTKradiant built in plugin
[*]Convert OBJ to FBX
[*]Import FBX in UDK's content browser
[*]Add newly imported mesh to map
[*](this processe makes whole map lose all textures coordinates, entities, liquids, etc. Only map's geometry is kept)
[/list]Now to walk around in map: disabled collision, enabled per poly collision, added a skylight, set kill z to something far away from the model, played with default UTgame type. The scale seems correct, except that running speed and jump height are different from quake 3.
[Blocked Image: http://i419.photobucket.com/albums/pp274/imagensdiversas/legodeck%20rev2/shot0000_zps2aba7801.jpg]
[Blocked Image: http://i419.photobucket.com/albums/pp274/imagensdiversas/UDK%20misc/Untitled-1_zpsb1423519.jpg]