MDF( medium density fiberboard )- Wikipedia
(ttps://i.ytimg.com/vi/PRhM5LcQ1ts/maxresdefault.jpg )
>598
(ttps://i.ytimg.com/vi/-oCBlq8OYG0/maxresdefault.jpg )
英: perspective projection - Wikipedia
(ttps://i.ytimg.com/vi/DLfeM07dExI/maxresdefault.jpg )
(ttps://i.ytimg.com/vi/yIBgJgBvga8/maxresdefault.jpg )
2-Point Perspective
(ttps://i.ytimg.com/vi/mgfeehj48a4/maxresdefault.jpg )
>662 floor
(ttps://i.ytimg.com/vi/Gxs8Lwq5h-A/maxresdefault.jpg )