Like the title suggests, a wall that allows all particles, but blocks energy particles. Sounds very useful.
You can use the gas wall, powder wall, and/or liquid wall.
But that's 3 blocks thick
@EwguhMicBewguhGuy (View Post)
The idea is to have a wall that allows all particles except energy particles; none of the walls we have now do that. Having walls opposite to the ones we have that only allow certain particles would be very useful.
That would be useful, but using other walls together has the same effect.