vfx

Rain

The call script is :-

vfx.Rain(clip [,int sf = 0][,int ef = end frame][, int type = 2][, int etype = type][, int slant = 2 ][,int eslant = slant][, float opq = 0.5][, int span = 16][, int box = 2 ])

clip: input clip of constant format. Compat input not accepted.
sf: Effect Start Frame Number
ef: Effect End Frame Number
type: Type of rain 1: light, 2: medium and 3: heavy
etype: Type of rain at end of effect 1: light, 2: medium and 3: heavy
slant: slant of rain 1: left, 2: vertical and 3: right
eslant: slant of rain at end of effect 1: left, 2: vertical and 3: right
opq: opacity of the Rain. 0.1 to 1.0
span: apparent vertical length of rain drop in frame. 4 to 64
box: width of the box.1 to 4. Type gets an inverse multiplier with this parameter. 1 makes rain stronger while 4 makes it lighter Rain

This function creates a Rain the type and slant of drops can be varied linearly during the effect.