SceneKit: Is it possible to cast an shadow on an Transparent Object?

Question

i am trying to cast an shadow on an totally transparent plane in SceneKit on OSX. I am struggling with this problem since several hours and do not come to any solution.

Answer 1

Oily Guo, your solution works. Here the solution is in code:

Configuration of the light source:

light.shadowColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.4)
light.shadowMode = .deferred

And for the floor (ie. SCNFloor underneath your objects):

material.diffuse.contents = UIColor.white
material.colorBufferWriteMask = SCNColorMask(rawValue: 0)