TL;DR
Make refined concrete stand out on the map with different shade of gray.What ?
Refined concrete is a great addition to make walkways throughout the (mega-)base. But currently it is not distinguished from regular concrete on map.It would be nice to make regular concrete darker gray, so it will make a gradient with darkest gray for stone bricks, dark grey for concrete and current gray for refined concrete.
Currently it looks like this, can't say from map where walkways are:
