From what I've read in the doc, the render window is mainly for SFML stuff, while window is for handling OpenGL. Is there a possible way to use both in the same window? From what I've understood I think not, but I'd like to know for sure. I'd also like to know if this mix (in case it's currently not possible) is planned for future SFML versions or is just something that just cannot be for "x" or "y" reasons.
In case it's currently not possible or not planned in the future is there a reasonable way to implement something that would allow it? My purpose is to have a minimal 3d background while using SFML for 2d management like I've been doing so far. Is it possible or planned?