I agree that the the lack of lighting solutions is currently the single most serious problem with OpenGL. I do most of my 3d navigating in "Doom" mode and its a pain to have to constantly drop out and drag the sun around so I can see what I'm looking at.
Shadow casting would be nice, too, while I'm wishing, but I can see how there would be performance problems there. A more flexible system of lighting is more urgently needed and shouldn't be too demanding on the system resources.
David Collins
Win10 64bit Intel i7 6700 3.40 Ghz, 32 Gb RAM, GeForce RTX 3070
AC 27.0 (4001 INT FULL)