Visual Input - how do you see these?

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I was looking over some information about depth perception and noting this image in a section saying that most people have a natural tendency to assume that light is coming from above. Which seems logical, given that, not being deep-sea creatures, it's the direction we see the most common natural light-sources (sun & moon primarily). But looking at this example, I apparently don't perceive them the way most people do... I know that in a lot of cases, this works for me, where the placement of dark lines above and light-shaded lines below gives me the impression of something being recessed in for example the interface of a Windows program, (3D style interfaces like buttons being popular), so when they swap the colors on a button that I'm clicking it does look to me like I'm pressing the button down into a recession, but for some reason it doesn't work with this image. For me they both look convex (though it does look to me like the light is coming from a different direction). I actually find it difficult to "trick" myself into perceiving the 2nd one as being concave -- it just doesn't look it, it looks like "light from below", no matter how many golf-balls I've seen over the years. I wonder how many others here have a similar experience with this one?



Thanks,

what's convex and concave mean?

convex means curving outward(like a bump), like the ones on the left may appear.
concave means curving inward(like a pit), almost like the ones on the right.

They don't look concave or convex to me, just looks like linear gradients.

I see them perfectly normally, the ons on the left look like bumps and the ones on the right took like pits.

I see both as convex. The ones on the right are flatter, thats for sure, but still convex.

They both look like flat circles to me, if I try really hard, the first looks slightly more convex. But only if I try really hard.

They all look convex to me.

I can trick myself into seeing both pictures convex, concave, or neither. If I don't try to trick myself, I see the one on the left as convex, and the ones on the right as concave.

They both look like flat circles to me. If I try, I can see the left one as somewhat convex, but I can't see the right one as concave at all. They appear 2-D only.