Hello, Starting back from the Triangle Mesh Example, I would like to add it to a Container, and use the Container.alpha variable to act on my triangle (as it would do with a sprite). Please see this playground:  https://www.pixiplayground.com/#/edit/5usZGTmqzQ4MtxP~QLUfF container.addChild(triangle); container.alpha = 0.5; // <- NOT WORKING (EXCEPT FOR 0.0) Triangle should be semi-transparent. What is the good way to do that? Thanks Romain