Filodoro, Да, можно.
Вот этими параметрами:
Код:
// 0.3 to 2
var snowmax=45;
...
var sinkspeed=0.6;
var snowmaxsize=30;
var snowminsize=10;
// the snowing-zone
// Set 1 for all-over-snowing, set 2 for left-side-snowing
// Set 3 for center-snowing, set 4 for right-side-snowing
var snowingzone=1;