I am completely new to UE4, and trying to port some of my work from other engines as a learning excercise and to see how UE fairs against the rest.
I need to use screen space derivatives in my material for constant screen width effects, but it seems that Unreal restricts use of it for gles 2. There’s an extension GL_OES_standard_derivatives, is it possible to make use of it? Am I just not allowed to use derivatives in ES2 period?