PDF- New set of particles

I created a new set of particles with better jittering to see if that would help with the grid-like layout of the previous test.  It did.  I also culled this set in one batch to see if that removed the banding/overlapping I was getting from before.  It did.  The banding effect could just be from the bad jittering in the first set.  Still need to test to check.

This set had an initial 4.7M position set.  It was culled down to 1.7M, then further minimized using a quadratic PDF.  Here are some renders :-).

Top View.

Perspective View.

with size variation.

Close Up.

with size variation.