I just tried this, and it's somewhat strange? Zoom out until you can see the globe, and forests are shown. Zoom in one step, and forests are all but invisible.

I just tried this, and it's somewhat strange? Zoom out until you can see the globe, and forests are shown. Zoom in one step, and forests are all but invisible. As you continue to zoom in, contrast is all over the place. Turning on terrain mode does, however, increase contrast for every zoom level.