(Reply to Breatas also posted here for others to comment on.)
More specifically, we need stalactites, the ones that hang from ceilings.
Also, do you have a UD PC. If not, just make up a quick one just for development purposes.... or ... hmmmm, one sec.
This should give you an idea of what builders currently have to build with with regards to Drow cities,
That is it. Those 12 objects. That is what Sshamath is primarily composed of that are Drow specific, especially that center Drow house. None of the objects shown are tintable. What I would love to see is a version of that center object, but in stalactite form, hanging from ceiling, rather than stalagmite form, as this one is in. Many of the most prominent "buildings" in Sshamath are stalactites, not stalagmites.
The Drow stone shape the natural structures in caverns to produce the homes and the unique architecture common to many Drow cities. I would like to see many more variations of the objects in that print screen. Note also the hovel like homes at the bottom.
However, not sure if you can do this, but I wish there was a specific tileset for the insides of a Drow structure. It would be cave-like, but unnatural looking. Something like this would be much much better than any tileset currently used for the insides of Drow structures. Currently, they make ZERO sense. Only a couple tilesets get close, but they tend to be grandeur in fashion with huge tall ceilings, etc... The master floor of the School of Necromancy is a good example of the former, but even that isn't even close to how Drow structures should look internally. Things like the new sewer system could also use a more magical stone shaped feel vs. a Dwarf brick by brick feel.
If possible, think modular. Perhaps many LEGO like pieces that can be put together to produce many many variations of structures, some large, some fortress-like, some small, etc... Then all a build has to do is piece them together to his liking and perhaps set up prefabs to share to all. This gives a builder much more versatility.
So we basically need, or perhaps want, pieces that can construct Column, Stalagmite, and Stalactite structures along with pieces that seem to naturally connect them (note the one and only stone bridge next to the massive columns in that picture). Tintable is preferred, of course.
Sorry if this is all a bit much, but that is really what is needed to build a proper looking Drow city with a bit more variation than what we currently have.