>>3818884>such as lens distortionThat's bull, and you know it. You have plenty of images without any significant lens distortion effects. That's like me saying I can only study from orthographic views, because those are the only way of not having any distortions. Our brain knows how to deal with distortions, and it's not very common that something is distorted enough for you to not be able to assess volume relationships (unless we're talking about blatant extreme distortions, of course).
>cropped out images of vital partsAgain, there are plenty of images that don't do this, and you can find heaps of good pictures to study specific body parts, like the torso, legs, and so on.
>The ideal references for study are those used for academic purposes such as There's no difference between that and some porn image on the internet, other than that woman being a fucking ugly skelly.
We both know people who spend their time looking for "the right references to study from" are just procrastinating, gimme a break.