A simple rendering suggestion; change the apparent size and brightness of stars depend on the size of systems and sectors, so that they are equivalently the same size as the map-painting stars at system edges.
This would aim to smooth out system transitions when the sector sizes are small, so that you don't have a massive sun disappear when you move a few meters. It would also make the sun more visible on planets and stations further from the center of systems when the sector sizes are incredibly large.
This would aim to smooth out system transitions when the sector sizes are small, so that you don't have a massive sun disappear when you move a few meters. It would also make the sun more visible on planets and stations further from the center of systems when the sector sizes are incredibly large.