I’ve managed to make a simple route of a couple of miles in the Tyne Valley and laid some of the track. Several times I have left the train to walk around and, particularly when jumping off the track onto the bed, the player sometimes falls through the landscape into the abyss. I created the tiles individually using the SRTM file and then applied Lidar to each tile with everything looking good as far as I could see. Any advice on what I might check to get to the cause of this would be very gratefully received.