WHY ARE TWO OF MY COMMENTS HERE? Oh, I must have already had two saves named wall... Oh well...
Why is that comment there?!?!?
A few other neat things: It conducts in a line or hexagon instead of an octogon. It will change color when pressure is applied (The PSTE turnes solid). Finally, if you heat it, the FILT will change color, and if you heat it enough, the PSTE will turn to BRCK. It will still cool back down though.