also, if you are headed to the Unreal engine a handy little tool called G16ed is usefull for working with and exporting 16bit greyscale images to their proper format. These suggestions are quite good. You could also draw out the road system in photoshop in a layer above your height map. Set the blending mode to overlay,…
I'm in the design doc stage of figuring out workflow. I'm trying to figure out how to create roads that follow large terrain meshes, levels nearly 100 km across. Roads should go up and down in elevation but stay fairly level across the width of the road. To map the road texture, I'm guessing the roads will need to be…