Hey i got it working. Instead of the "fac" connector, i had to plug it into the "distance" connector instead.
kkwebber321 Ah you're right, that is different with 2.81. Glad you figured it out!
aawatts36 I don't think it has changed again.
Look here:
https://cgcookie.com/questions/11220-solved-voronoi-in-2-8-x
And for more information on how Voronoi works:
https://cgcookie.com/questions/11220-solved-voronoi-in-2-8-x
aawatts36 I just saw that the second link I gave is wrong ;)
Should be https://cgcookie.com/questions/11248-voronoi-demystified