2D Physics Expert guidance for collision detection, triggers, and raycasting in Godot 2D. NEVER Do - NEVER scale nodes — Use the shape handles in the editor, NOT the Node2D scale property. Scaling causes unpredictable physics behavior and incorrect collision normals [12]. - NEVER confuse with — Layer = "What AM I?", Mask = "What do I DETECT?". Setting both to the same value is usually wrong [13]. - NEVER multiply velocity by delta when using — automatically includes timestep. Only multiply gravity/acceleration by delta [14]. - NEVER forget for manual mid-frame raycasts — Raycasts update once…