YouTube has a lot of Bob Track Builder tutorials to check out.
1 - Best tree size is 200 ( after importing into Zmodeler ,copy trees after uniting the 3ds batch,reorient and unite
both otherwise a bunch of tree halves are invisible in Viper.)
2 - Default guardrail is good for VR ( delete top and 1 side before exporting from BTB )
Set node spacing at 5 ( same as track panel length so wall follows track curves nicely).
After importing into Zmodeler - copy,reorient same as number 1 above.
3 - Track width multiplier setting best at 8.
4 - Panel length for hilly track set at 5.If no hills 10 to 20 panel length setting is ok.
Walls probably would be ok if spacing was wider than panel length,just not as smooth in the corners.
5 - Track panel width best set at 1 polygon ( lowest poly count for VR ).
6 - Track length in meters:
6,000. in BTBevo is 3.8 miles in VR,compared to Rock Island which is 3.0 miles long,Sunset Mesa is 4.4.
More info here in the future as tricks/settings are found.END OF QUICK TUT