Element #22 (VOID):
  Name: Void
  Hole, will drain away any particles.
  Also, it creates a small amount of pressure.
  VOID is similar to the outer boundary of the simulation field, except that PSTN cannot push particles into it.
    Anything that falls into it will disappear.
  If VOID has its .ctype set to an element, it will only destroy that element.
  If it's .tmp is 1, it will not eat that type of particle.

Element #39 (VACU):
  Name: Vacuum
  Sucks in other particles and heats up.

Element #40 (VENT):
  Name: Air vent
  Creates pressure and pushes other particles away.

Element #84 (PVOD):
  Name: Powered void
  When activated, acts like VOID.

Element #150 (BHOL):
  Creates a negative gravity field and sucks in particles (like vacuum without exerting any pressure).
    Newtonian gravity must be enabled.
  Can also be created using the console by putting alot of particles on the screen and compressing them.

Element #151 (WHOL):
  Creates a positive gravity field pushing other particles away (like vent without exerting any pressure).
    Newtonian gravity must be enabled.