Across the middle of Iceland, there are all sorts of terrain. I don't know if this is specifically Tundra. All my expertise in Tundra comes from Civilization where I know you can only grow one wheat, and sometimes there is a fur resource because of the seals. When the sun is very low on the horizon, my normal temptation is to point the camera in that direction. But in the opposite direction, when the light and terrain is right, it casts a faint reddish glow across the ground. It's a very nice effect and I did my best to capture it.