# Smear ## Overview The Smear effect simulates water particles running down on a distribution and eroding them downstream. This is similar to Fluvial Advection and Color Erosion, known from other applications. It is intended to be used in combination with gradient materials that can use it to create the effect of washed off sedimentation. ## Parameters

Properties	Description
Angle Randomness	Adds an additional randomness to the Spawn Angle Range.
Random Probability	The probability of a particle spawning.
Spawn Angle Range	The slope angle in which perticles will spawn.
Update Interval	Controls the frequency of simulation step updates.
Iterations	The number of simulation iterations.
Step Size	Controls how far each particle travels each update.
Inertia	Controls how fast the particles react to changes in the terrain while traveling.
Type	Specifies how the transported values will be written to the mask.
Cleanup Steps	Applies additional cleanup simulation steps after the particle has settled.

## Results