Unreal Engine – Infinity Weather

[Video] [Demo]

Displacement:

configurable displacement capture blueprint
top-down projection of displacements rendered using shape definition in the shader (sphere, capsule, box, cylinder, decal, trace-sphere)
skeletal mesh displacement supports
interface for easy integration with all types of actors
area of displacement move dynamically with the actor or camera 
time-based accumulation of snow
displacements can be used for multiple other effects (like grass interaction)
displacement material functions ( snow, mud, sand, grass)
small world texture (1024x1024) can handle even 150x150m area

Post-process:

two materials with fast dynamic switching between material permutations 
post-process effects (raindrops, frozen, sharpen/blur)
pre-translucent effects (rain circles, heat haze, experimental glitter)
reacts dynamically on weather conditions
supports character and sequencer camera

Footstep:

notify based footsteps detection system
example footstep types (SFX, VFX) snow, rain, mud
physics material support
configurable footstep component adjustable per character
footstep volumes with priorities and conditional spawning

Precipitation:

defined effects snow, rain, dust, hail
GPU friendly and efficient, implemented on single material and mesh.
up to 65000 particles per emitter wit