@nmd(View Post) How about this: you tune the GPMP to make a specific element levitate, you then make the bottom of the city out of that element and use gravity to contain the gravity.
Ok, I see the problem, guys, i'm not trying to make a levitating city, I'm trying to make an upside-down city
I was going to put a long strip of gpmp on the top of the screen, set the temp to twice to whatever the vertical gravity's strength is and build a city down.
I wasn't trying to make a levitating city, but I can keep that in mind :)
@nmd(View Post) every element is different, just go by dust... its in powder.h, look for dusts gravity, go to console, !set temp gpmp dust gravity + 273.15 then make from there