You are my hero

It's kinda hard to see the difference between the last 2 panels

I can see it. A is too uniform/flat. The indent looks like a "pinch" from a string with the wrong perspective. B has more natural curving from the proper angle.

I said hard, not impossible.

I think it's pretty easy. My explanation makes it easier to spot for anyone who has a hard time.

I praise your good eyes then

Really good tutorial, I think I can get a better understanding of it from this.

These are very nice.

I just want to say, thank you so much for posting these tutorials, they have all been an incredible experience to look through. It's wonderful to see artists share their knowledge and it really warms my heart to see just how much detail you put into these. It goes well beyond many, many others I've looked through, and they have taught me more about the physical aspect of art far more than any anatomy book ever has. (Physical aspect being how clothing and muscles interact, bulging, stretching, folding, and etc.)

If I were in the financial situation to give you a few dollars for all you've taught, I would gladly do it, and may still in the future, keep up the wonderful work!

^^