[bitbiter]

Vulcan, DirectX 12, and Metal are basically like C. They're made to be as low level as possible while maintaining hardware portability.

With the PS4 hardware is locked so their API is more like assembly (or maybe inline assembly in a C program) where you're doing specific hardware operations.

They also provide a second graphics API that wraps that one, working basically at the same level as Direct3D 11 or OpenGL.

This article might be of interest: http://www.eurogamer.net/articles/digitalfoundry-inside-play...