copySOP and switch expressoion

Copy SOP/Stamp tab

variable 1: switch
value: fit01(rand($PT),0,(opninputs("../switch1")))

switch SOP

Select Input: stamp("../copy","switch",0)

particle expressions #01

$PSCALE * 0.5
Cuts the scale down in half

fit($PSCALE, 0, 1, 0.2, 0.8)
remaps the pscale attribute to a new fit range.

smooth($AGE, 0, 2) * $PSCALE
will scale up the instance geometry from 0 to $PSCALE according to the age of each particle.

(smooth($AGE, 0, 2) - smooth($AGE, 4, 6)) * $PSCLAE
will ease in the scale between age 0 to 2 then scale them back down to 0 from age 4 to 6.

$PSCALE * fit(length($VX, $VY, $VZ), 0, 10, 0, 1.25)
will increase the psacle as the particles move faster.