Yeah, but I'm saying it seems like we have a preference for things lit from a certain angle. I think most people will see that crater as a bump. Yes, they can force it to look like a crater. And, if you turn the picture over, most people will see it as a crater. Why the preference? Is our brain designed to see craters lit from the right (?) as bumps? Save that picture into a graphics program and do the following: flip it, mirror it, rotate it 90, 180, 270. You will see some as crater and some as bumps.
Maybe someone can post these various shots so you can see what I mean.
I remember an article years ago, maybe Scientific American, that talked about this. I've forgotten what they said about it.
My brain must be wired wrong, lol! I'm familiar with that claim and have seen some really good examples of it. But in this case, I see a crater right off the bat and only see the bump when somebody mentions it.