PP filter comparission update
Ive added some -vf uspp (PP by (mis)using the snow codec) based images to pp vs. spp filters, the reason for uspp=6 instead of higher values is that higher ones wake the OOM-killer :-) the reason for the lack of pp=ac/ha/va based samples is that they look identical to the pp=de/hb/vb
Original
unfiltered
pp=hb/vb/dr/fq=8
pp=hb/vb/dr/fq=16
pp=hb/vb/dr/fq=32
spp=6:8
spp=6:16
spp=6:32
uspp=6:8
uspp=6:16
uspp=6:32