A generous fuck-ton of muscular male abdomen references.
* As always with large images, you gotta reverse-image search ‘em to find the larger size. Sorry about that. It’s the most helpful reference you will find on abs, so far, so I encourage you to search it.
The reason why some people have issues with abs is because, most of the time, the person who’s ripped has 0% fat on ‘em, so it looks ridiculously artificial. You gotta contrast the muscle in a very precise and concise way, and it can look fake, depending on the lighting and corporeal structure of the circumstance. And I say that cautiously, as by “fake” I don’t mean they look disproportionate; it just sometimes doesn’t look like how skin and muscle should appear. (And I know there are some repeated images in this post, but since it’s about something specific, I thought it’d be helpful to have ‘em conglomerated in one place.)
[From various sources]