Input animation to use in an [AnimationNodeBlendTree]. A resource to add to an [AnimationNodeBlendTree]. Only features one output set using the [member animation] property. Use it as an input for [AnimationNode] that blend animations together. $DOCS_URL/03_usage/05_animation/04_animation_tree.md $DOCS_URL/07_demo_projects/3d/platformer Animation to use as an output. It is one of the animations provided by [member AnimationTree.anim_player].