CC Snowfall, on an adjustment layer, isn't covering the entire composition

[Jack24443636o995]

Hi all, I have a 9x16 composition. The adjustment layer is just as big as the comp size. There aren't any masks being used. The ground level on CC Snowfall is set to 100% the entire time. Yet, the effect stops short of bottom of the comp. It might be a bit hard to see, but there's quite a bit of solid space at the bottom. Does any know what could be causing this?

[Rick Gerard · Accepted solution]

CC Snowfall is not an effect you should apply to an adjustment layer. Several effects fall into that category. If the effect generates particles, lighting effects, or 3D shapes, you should not apply those effects to adjustment layers. Adjustment layers are suitable for color grading (curves, levels, Lumetri Color) and sometimes distortion effects. 

Add CC Snow (or Rain) to a White solid, turn off Composite on Original at the bottom of the effects controls, then adjust the other settings to get the snowfall you want to see and experiment with opacity and blend modes to make the snowfall look realistic. 

If the shot has 3D or multiple 2D layers, you can insert copies of your snow or rain layers between them with slightly different settings to create a more realistic snow effect. Masks used in Compositing Options for these kinds of particle effects can simulate snow falling under street lights or being blocked by trees or awnings.