[aruanan]

You have to visually force the caldera to be a depression, not a bump, but it's a great image.

You see that as a bump?

[cogitator]

You see that as a bump?

Sometimes, kinda like the reversing box optical illusion. The first Viking images were the worst. I could never turn them into a depression rather than a plateau unless I turned the picture upside down, and sometimes that didn't even work.