The usefulness of the snow effect is doubtable and it is rather
difficult to port the effect to the new rendering architecture
introduced with GLES. It is probably easier to rewrite the complete
effect from scratch, therefore it is removed for now.

I might consider readding it for 4.7.

This kind of "fixes" snow related bug reports.
BUG: 259362
BUG: 254498
FIXED-IN: 4.7.0