Master of "Perspective"

This is one of my simple sketch for drawing fundamentals' homework and I'm going to be the master of perspective (wishful thinking,LOL)
But before that,there is a guy,the one and only that eligible to be called "The Master of Perspective"(personally think),Kim Jung Gi.
He's a Korean artist,born in 1975 in Goyang-Si in the province of Kyongki-Do(South Korea).He don't usually take references while he's drawing,but he's always collecting visual resources.He then observe them carefully on daily basis,almost habitually.And the reason why he can create such perfect images of fish-eye perspective is because he's always thinking about perspective and space,and when he's drawing he try to expose his knowledge as much as he can.He's just naturally got used to it as he's been constantly observing space.To give a tip,understanding the principles of cube is a big help.

and these are some of his artwork,

or you can click here to watch one of his show in China.