[6S.Maraz]

Road and railway textures, an easy method.

Rail and road use the following greyscale RGB values

Country roads, base RGB = 32
Railway, base RGB = 64
Rail on a sandy bed, base RGB = 96
Highway/main road, base RGB = 128
Highway/main road on a sandy bed, base RGB = 160
Rail on a highway and sandy bed, base RGB = 192

Actually what you call "Rail on a sandy bed" is just a railway running over a country road (32+64=96).
The same is true for the "Highway on a sandy bed".

This is a nice graphical effect, but it can give unwanted artifacts when the rail is crossing a true country road.

Very useful tutorial, thanks

Maraz