Unity Physics Casts: Raycast, Boxcast, Cast All (Getting Started Tutorial) - YouTube
See every "cast" in Unity visualized! Raycasts, Spherecasts, Boxcasts, even Capsulecasts (and their "All" variants), explained in this Unity Tutorial! Full video link in comments! : r/unity_tutorials
BG Tools - Cast Visualizer
Unity (5.5.2) - Using BoxCast2D - YouTube
Orbit Camera
Box Cast Returning Wrong Normal Vector on diagonal Tiles - Unity Forum
Understanding Spherecasts in Unity | The Ant Ranch: Blog
c# - Detect if there is any object between two objects with BoxCastAll - Stack Overflow