Gravity Dust (GTDU) would basically be a dust form of GPMP. It would attract or repel particles based on the temperature, and it doesn't conduct it to other elements, either. It could either be a sky-blue color or a greemish-blue. It would also be indestructible to anything but anti-matter, SING, void, and black hole. Unlike GPMP, it cannot be unactivated.
Uses:
It would be used for making some types of planets (theoretically), and possibly, in a way, simulate them "crashing".
It would also help people make stronger nukes (although the nukes I've seen today are already overpowered XD)
It would make for some very amusing deconstructions of structures.
It would also make something destroyable that can be used to repel particles for force fields, shields, space vessels, ect.
Although we already have GRVT, I feel like we need a type of gravity element that interacts with the particles more.
Want me to try to code it on Lua?
Simple solution: GRVT with tmp2=1 is solid (sets it's own vx and vy to 0)
Strange, in the source the file for GRVT it called GVRT.cpp