Hello, everyone, I work as AR Graphic Programmer.
I have a some question about alpha blended in scenekit with arframe.
I expected when shader defines the pixel's alpha to zero, and then they rendered background color like this.
Yeah it's not problem in case background of scnview scene is nothing.
But in case I changed scnview.scene.backgound.contents
to ar frame, it looks black like this.
I can using discard in fragment shader but heard using discard
in fragment shader makes performance issue.
(And I implement shader using scnprogram...)
changing alpha blend option or transparency option can solve this?
I hope solve it.
I find a way myself.
this method works well! (https://gist.github.com/delasign/2b797c6afd819c7cc04ee42158ec5787)