if you need more info search https://powdertoy.co.uk/
also, filt is more used than inst because inst can only passes 2 stages/bits of information 1 and 0. filt can pass/store 30 stages/bits of information, thats why that giant block is made of filt
filt is usefull, whit tmp you can change diferent modes. logic gates, and, or, xor, not(dont know how to use it yet). variable or not, blue or red shift(when bray or phot pases into filt it shift to blue or red), and qrtz(if phot toches filt, it randomises colour)
FILT have 30 bit colors, you can write binary digit in this filt. 1 is "1" 30 is "536870912"
Put Bizr Through All The Filt In This Save To Make Party Liquid
look at filt wiki on https://powdertoy.co.uk/Wiki/W/Element:FILT.html
@VIPERGAMEZ cool but useless
when phot passes thru it gets turned to the colour of the filt