StepSense

StepSense makes every step of your characters sound and look like the ground they walk on. Place a StepSense Footstep notify on the frames where a foot lands, or switch the StepSense component to Automatic and let it step from the distance travelled with a speed-based stride and alternating feet. Each step traces down from the foot bone, reads the physical surface and plays that surface's sound, footprint decal and particle from a StepSense Profile data asset.

A profile lists your surfaces - by surface type or by exact physical material - with footstep, jump and landing sounds, random volume and pitch ranges, attenuation and concurrency, a footprint decal with lifetime and fade, an optional mirrored or separate right-foot decal, a particle effect and a VFX tag for Niagara. Each character can carry its own profile layered over the project's default profile, and profiles can inherit from parent profiles, so a robot or a barefoot hero only defines the surfaces that differ.

Loudness follows speed and stance: walk, run, crouch and sneak multipliers, a speed factor or your own speed curve, the surface's own loudness and a multiplier on every notify. The same loudness drives the sound volume and the AI noise: every step, jump and landing is reported to AI Perception's hearing sense, or through Make Noise for Pawn Sensing, with a range that grows with loudness. Characters automatically get jump sounds and landing impacts scaled by the fall velocity, with footprints of both feet; other pawns trigger them from Blueprint.

StepSense Surface Volumes replace the detected surface inside them, so a puddle on asphalt or a snow drift needs no extra materials. Footprints enter a world-wide pool that removes the oldest print when it is full. Surfaces can leave a trail: after walking out of mud, the next footprints keep the mud print and can fade step by step through a material parameter. A minimum interval per foot removes doubled notifies from blended animations, and sound limits per character and per world keep crowds under control.

On Footstep, On Landed and On Jumped events give Blueprints the foot, surface, location, normal, loudness and the spawned components. The Blueprint library traces surfaces, names them, plays a step anywhere and reports noise. The StepSense.Debug console variable draws every trace and prints surface, loudness and stance.

StepSense is part of the Alpha XP collection for Unreal Engine 4.27 and 5.8. Every feature is exposed to Blueprints and C++, it ships with styled HTML documentation, and it is compiled and verified warning-free against clean UE 4.27 and UE 5.8 projects.

Key features

• StepSense Footstep anim notify with foot and bone/socket, tracing down from the foot
• StepSense Profile data asset per surface type or physical material: sounds,
• Automatic stepping without notifies: speed-based stride, alternating feet, Hybrid mode
• Jump and landing sounds and effects scaled by the fall velocity
• Speed- and stance-based loudness: walk, run, crouch and sneak multipliers, optional
• Surface override volumes for puddles, snow, carpets and shallow water
• Footprint decals with lifetime, fade and a world-wide max-count pool (oldest removed
• Left/right alternation with mirrored or separate right-foot decals and per-foot offsets
• AI hearing: noise events with loudness and range for AI Perception or Pawn Sensing
• Per-character profile layered over the default profile, with profile inheritance
• Throttle: minimum interval per foot, max simultaneous sounds per character and per world
• Wet and dirt trails: the next N footprints keep the previous surface's decal
• On Footstep, On Landed and On Jumped events
• Blueprint library: Trace Surface, Get Surface Name, Play Step At Location, Report Step
• StepSense.Debug console variable
• No plugin dependencies, no content required, C++ only

Blueprint & C++ API

The API is organised into these entry points:

Callable runs when executed · Pure no exec pin, returns a value

Events & delegates

Bind these in Blueprint (drag off the object → Bind Event) or with AddDynamic in C++.

Options & enums

Compatibility

One ready-made build per engine version is included in the download — copy the one that matches your project.

Technical details

What's in the download

Quick start

1. Unzip the download and pick the build that matches your engine (4.27 · 5.8).
2. Copy the StepSense folder into your project's Plugins/ folder (create it if needed).
3. Open the project, enable StepSense under Edit › Plugins and restart the editor.
4. Right-click in any Blueprint graph and search StepSense — or include the public headers from C++.
5. Package for your target platform (Windows, macOS).

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