WebGL is ultimately translated into OpenGL calls. OpenGL calls are ultimately translated into bytes sent over the bus to the graphics card. It takes a lot of

WebGL is ultimately translated into OpenGL calls. OpenGL calls are ultimately translated into bytes sent over the bus to the graphics card. It takes a lot of level descending before you reach the ground floor :-) Unity is there, I imagine, because it's interesting to see how it translates code that expresses high level concepts like "meshes" and "materials" into code for to the backend, compared to the hand-written OpenGL or DX or Metal or whatever calls.