I’m hoping a developer can fill me in on the specific details but as far as I can tell is that it deals with your graphics card. OpenGL is an open source API for rendering graphics. It deals with strictly the math behind the rednering and I’ve noticed it’s used by for a lot of integrated/ laptop graphics cards. I believe it may have to do with slate which what Epic uses to display most of the launcher graphics. Slate is also used in the editor so you may need to use the command for that as well. Let me know if you have any more difficulties with it.
-Max B.