Meanwhile, I managed to install PaintShopPro (my preferred painting proggy).
And looks like BTB will run as well on W10...
Now 3DSmax and Google Earth and 3DsimEd and Sketchup... then I'm back in bizz.
Edit: BTB, 3DSmax and G-Earth running... Wow it looks good too.
Look here... https://www.youtube.com/watch?v=-xw1fcGiDFs
I could snip some mountains if you like and make them X-packs.
You can then just insert them in the track. Alternatively, mountains can be set up to fit the track.
Also, there is an alternative to the 'lerp-alpha' color-mixing that rFactor allows.
You must use 'add'. But it is complicated and can only be done using 3DSmax and 3DsimEd.