I am trying to cast shadows through a plane with an alpha mask with the shadow catching the alpha shape.
Based on the sample of the simple cloth simulation https://threejs.org/examples/webgl_animation_cloth.html and other solutions to the same problem here, I’ve done this fiddle: https://jsfiddle.net/truji7/gj7az9eo/69/
But the cast shadow is still the whole solid mesh’s plane. I must be missing something. Any ideas?