Eh, you cut off the second part of what I said.. What I mean is, if you go down the route of writing your own graphics engine, then everything Unreal has is ava

Eh, you cut off the second part of what I said.. What I mean is, if you go down the route of writing your own graphics engine, then everything Unreal has is available in bits and pieces for free online, but you have to have the know how to stitch them together - which isn't particularly hard, and something you should know if you are going into gamedev anyway as it's the basics. Note I'm only talking about the graphics aka shader side here, not the whole engine.