velocityDilation

The radius behind dilateVelocity.renderFeature, and the parameter buffer its passes read.

local velocityDilation = require("@builtin::systems.velocityDilation.velocityDilation")

velocityDilation.set({ radius = 2 })   -- velocity reaches 2 px past a silhouette
velocityDilation.get().radius          -- 2
velocityDilation.active()              -- true while the passes run
velocityDilation.clear()               -- back to what the geometry passes wrote

radius is clamped to [0, velocityDilation.maxRadius()]. The search costs (2r+1)² texture loads per pixel, which is what the ceiling bounds. A radius of 0 releases the passes and the intermediate target with them.

The same settings are authorable on an entity as the VelocityDilation component.