# Play imported animation clips [Back to Use gameplay actions](https://rustic-game-engine.pages.dev/markdown/guides/gameplay-actions.md). Import a glTF, GLB or FBX model through the Explorer so it has an `.rmeta` sidecar. Attach a script to its mesh entity. Before `Start`, the engine binds source nodes as descendants named `node_N`, retains the skin palette/inverse bind matrices and registers named clips. Script-created model instances receive the same binding. `Animation.clips(object)` lists names; `Animation.load(object, "assets/character.glb")` explicitly binds a model to a fresh target. Rebinding an animated target is rejected so duplicate skeletons cannot accumulate. Follow [Set up gameplay actions](https://rustic-game-engine.pages.dev/markdown/guides/gameplay-actions/setup.md) before running this Lua example. ```lua return { Start = function() local actor = rustic.entity_id() for _, name in ipairs(Animation.clips(actor)) do print(name) end Animation.addMarker(actor, "Attack", 0.4, "Hit") -- add before playing Animation.play(actor, "Attack", { speed = 1.2, blendIn = 0.25, blendInEase = Ease.OutCubic, blendOut = 0.2, blendOutEase = Ease.InCubic, }).onMarker("Hit", function() print("apply damage") end) .onFinished(function() print("attack finished") end) end } ``` `Animation.addMarker(object, clipName, time, name)` adds a source-clock event to a registered/imported clip. Running actions retain their existing clip snapshot, so add markers before playing. Play returns the usual pausable/resumable/cancellable handle plus `stop`, `speed`, `loop` and `onMarker`. Source time stays linear at the selected speed. Changing playback speed leaves blend durations measured in scene-clock seconds; looping keeps the initial blend clock and turning looping off finishes the current cycle. `easing` is an alternative default for blend curves; only explicit `progressionEase` warps clip sampling. Marker times use the source clock. `Animation.blend(actor, "Walk", "Run", {duration=0.3, easing=Ease.InOutCubic})` samples both clips during the transition; `transition` is an alias. Duration measures blend time, not clip length. The glTF importer preserves linear, step and cubic-spline interpolation. FBX takes are baked at 60 Hz; skeletal vertices use four linear skin influences and retained inverse binds. Malformed FBX joint indices that exceed the 16-bit palette limit are rejected during import rather than truncated. Rendering consumes live node transforms. Morph-target animation, dual-quaternion skinning and animation graph/editor UI are outside this surface.