I encounter a problem with ConcavePolygonShape2D. I tried to adapt the Area 2D Input Events example, provided in the Godot examples set. I did replace the RectangleShape2d of the Area 2D Input Events example, with a ConcavePolygonShape2D. My purpose was to design a so-called tromino, i.e. the so-called "V" tromino. I did set the Array Property Edit area with Array Size = 6. I did then set the Indices accordingly: (0,0), (0,64), (32,64), (32,32), (64,32), (64, 0). But as a result, the shape is
not properly designed: only 3 lines appear.