Hello, I would really like to use normal maps in pixi.js but I don't know how. I've came across a good example with THREE.js and using webgl shaders - clickOnDemo (sometimes it's necessary to click once on the image to work). So I really wanted to replicate it but using pixi, I gave it a shot aand black screen - myDemo . I don't get errors and I'm not sure what I'm doing wrong. Could the problem be  in the way I'm creating the mesh? I've checked other example from pixi's page in which shader wit