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Add the behavior to any Sprite object. No event sheet setup required — the trail appears automatically when the sprite moves.
Properties (Full version only)
Enabled — Turns the trail on/off
Trail Length — Max number of ghost copies (1–30)
Fade Duration — Time in seconds for each ghost to disappear (0.1–1.0s)
Tint Color — Color applied to ghost copies
Opacity Start — Opacity of the freshest ghost (0–100%)
Spacing — Min distance sprite must travel before a new ghost spawns
Scale End — Scale of the oldest ghost (0.1 = small, 1.0 = same size)
Z Order — Whether ghosts appear above or below the sprite
Blend Mode — Normal / Additive / Multiply — Additive gives a glow effect
Spawn Mode — Distance: spawn on movement. Pulse: spawn every X seconds
Pulse Interval — Time between spawns in Pulse mode
Actions
Set Enabled, Clear Trail, Set Trail Length, Set Fade Duration, Set Tint Color (R G B, each 0–255), Set Opacity Start, Set Spacing, Set Scale End, Set Blend Mode, Set Spawn Mode, Set Pulse Interval
Known Limitations
Ghost copies trigger On created events. If your sprite has creation logic, add a condition to skip it (e.g. check GhostCount > 0).
Behavior works on Sprite objects only.
Full version here: jonasz-o.itch.io/motion-trail-c3behavior