antialiasingMode seems not work while adding node with SCNLight and set castsShadow as true

There is a simple SCNView with SCNNodes, one text node with SCNText and one light node with SCNLight.

I set the antialiasingMode of SCNView as .multisampling4X and it works until I set castsShadow of SCNLight as true.

antialiasingMode seems not work in this condition and the edge of text node becomes serrated, not smooth.

Is there any way to solve this problem?

Replies

I tested it in iOS 11 GM and Xcode 9.0 GM.

Is there any hint for this problem?

Thanks for your kindly help.