This my friends is graininess, density, and hardness 

Oh boy, you must be a grade A yates nuthugger if you really claim this pic shows graininess

The pic is just horrible, the sagging skin destroys the whole back pose and everyone with eyes can see that.
Yates looks like a granny here with his fold skin, like a 80 year old......

So I'll help you to correct your typo this time

Grannyness not graininess, got it ?

I have found another yates back shot for you

he is flexing to the max