Umm hyper realistic is a real term XD Its an art style too lol. I didn't make it up. I do a lot of stuff from images and also not images lol. And there's lots of reference for fantasy like wings. Just have to be creative with how you use it. And atually I didnt use an image for my leaf, i looked at a few references but it was of creation.
I'm actually doing art for a dual major with physics in school right now, so I'm using a lot of what I learn in my 3d models.
"Hyper realistic"
Congratulations, you have made a new term! =D
You have more solid examples of leaves though...almost all the art I do is based off an image. If it's not, it likely doesn't look good at all. With leaves, you can get super-close-up images with amazing detail.
With fantasy items like wings...there are all sorts of different kinds...and none of them realistic. ><
Unless you mean wings on a bird...which wasn't exactly the idea.
~Sev