Multi level masking only to 2 levels deep

[ecsancho]

Hi all

I notice that I can only  apply mask up to 2 levels deep. If you apply a 3rd level depth mask it removes the one before it. I'm using 4.2.2. Any ideas? Thanks!

 

var main = new PIXI.Container();
stage.addChild(main);

//works
var mask1 = new PIXI.Graphics();
stage.addChild(mask1);
main.mask = mask1;

var child1 = new PIXI.Container();
main.addChild(child1 )

//works 
var mask2 = new PIXI.Graphics();
main.addChild(mask1);
child1.mask = mask2;

var child2 = new PIXI.Container();
child1.addChild(child2);

//does not work 
var mask3 = new PIXI.Graphics();
child1.addChild(mask3 );
child2.mask = mask3 ;