For the road, I suggest copy/pasting the terrain into photoshop. Then create a selection in the shape of your road and feather it slightly. Noiw decrease the brightness level a little bit. Save it and go back to bryce. Duplicate the land terrain and load the photoshopped terrain as the height map in the terrain lab. Now go back to the main bryce window and move the non-roaded terrain slightly below the one with the road. This way, even though the terrain is below the other one with the bump, it will poke through where the road is. SO texture the lower terrain a muddy brown color and it might look like a road, might not. The other way you could do it would be: Add the ground terrain as a preset in your object library. Create a new scene with a square aspect ratio (1:1) and load the terrain preset. Now, disable sunlight and haze and make the material for the terrain 100% ambient and 0 diffuse (bright enough ambient so it looks about the same as it did before). Here's the tricky part. Rotate the camera so that it is completely facing the ground (exactly -90 degrees on the x-axis). In top view, position it so that it is directly centered over the terrain. Now in the camera attributes, change the field of view to 1 degree (as low as it will go). Now move the camera up on the y axis until the field of view can encompass the entire terrain object perfectly. This will take a lot of tweaking to get right, and you will have to move the camera left/right and the terrain even though it was aligned before. It needs to be as perfect as possible, i.e. the terrain edge lines up perfectly with the window. Setup your document as 512x512 and your render size as 2048x2048. Now plop Render. See if the material is too dark or too light and adjust. What this does is give you an isometric (perspective-free) texture map to edit. Paint a road onto this image in photoshop and apply it as a texture to the terrain in the other scene. It should line up perfectly if enough time was devoted to the above steps :)