Depthfade

Keywords: Softness, Z-Feather, Depth test

Depthfade is a mthod used to feather the edges of particles. Without it when a sprite intersects with the world, there will be a sharp line showing it. With depthfade/soft particles, it will gradually reduce the alpha of the sprite shader as it starts to intersect, making the the intersection much less noticable.

A comparison can be seen here: