Sort of. It's a pretty low-level execution graph, so you're seeing maths being done one operation at a time (then a node that does a lot of work all at once in

Sort of. It's a pretty low-level execution graph, so you're seeing maths being done one operation at a time (then a node that does a lot of work all at once in code, which is unhelpful if you don't literally know GLSL) Besides that, I would say you need to know about how a pixel/fragment shader works, which can be explained without any OpenGL details: It is a program that runs once for each pixel of the screen, taking its coordinates within the screen as input (called UV), and outputting an RGB value. The tricky part is not related to graphics specifically, but thinking in this stateless, independent, massively paralel way.