Thanks a lot for your quick answers.
First of all, I'm really impressed with YOUR tracks, Gentlemen
Yes, it's just a track and and terrain, no objects yet. I'm not experienced "builder", so I just wanted to check how it goes - without e.g moving all the vegetation due to bend changes. For now, it's probably too fast - this can be driven almost with the pedal in the floor (my Fraps limited the fps to 30 when I recorded the video, so I was to be very careful). So, I'll try to make it a little bit more challenging itself. The whole thing is (for now) like 8 km, the next sections are much more twisty and to drive with care...
Maybe some of you can help me with creating new objects etc. - I just have no idea of XPacks, creating meshes and all that stuff. How to use transparency with textures... Many questions then.. I know, how to use Photoshop, but have any experiences with 3d textures and objects. I just need some clues how to start, which tools are usable etc.
For example - this "sky" is just giant wall with some texture i put to one of XPacks (using just BTB). The texture is stretched like hell
Maybe I could add some clouds, but don't know how
I believe that it should be rather some big terrain object hung over the track?