Made an update to the terrain map. Went in and fixed a few more issues. Added a more realistic colour pallet.
3D view: https://skfb.ly/6AXNp
I realise I don't have a good time of day, but note the gap in the floorboards in RDR1
I made this gif just to show the map matches.
Credit goes to @TheWhiteHat for telling me about it!