game-feel

Attach a trauma-based shake script to the existing Camera3D that accumulates trauma 0-1 and applies rotation offset scaled by trauma squared. Combine it with a hit-flash tween on the damaged body's mesh and an audio ducking autoload, all fired from one damage signal.

Trauma-based shake accumulates a trauma value from 0 to 1, decays it each frame, and shakes the camera by trauma squared times a random offset. The quadratic curve makes small hits barely shake while heavy hits saturate the screen, and each frame subtracts the previous offset to prevent drift.

Capture each bus's initial volume with AudioServer.get_bus_volume_db at startup, then tween the volume down by a weighted dB offset and back using tween_method. Always apply ducking as an offset from stored values so user volume preferences are preserved.

The trauma curve and audio ducking logic still apply to 2D, but the camera shake script targets Camera3D rotation and needs a rewrite for Camera2D using offset instead. The skill documentation recommends using it as a reference rather than a drop-in for 2D projects.

Ducking is a no-op when the project only has the Master bus, because the impact SFX sits on the same bus being ducked. Create separate Music, Ambient, and SFX buses in default_bus_layout.tres and route impact sounds through the SFX bus first.

Skip this approach for turn-based or strategy games where feedback belongs in UI animation, and for networked games where the hurt body is remote. In networked cases, trigger the flash on a client-side visual hit signal rather than the authoritative damage signal.