1. Load CreateJS library via custom code.
2. use createjs.Tween.get() to operate material opacity:

// this function will work cross-browser for loading scripts asynchronously
    const loadScript = (_name, src, callback) => {
        let s;
        let r;
        let t;
        r = false;
        s = document.createElement('script');
        s.type = 'text/javascript';
        s.src = src;
        s.onload = s.onreadystatechange =  ()  => {
            if (!r && (!this.readyState || this.readyState == 'complete')) {
                r = true;
                callback(_name);
            }
        };
        t = document.getElementsByTagName('script')[ 0 ];
        t.parentNode.insertBefore(s, t);
    }

    // After all necessary scripts loaded 
    const onLoadScript = () => {
        const popup3d = this.activeSceneModel.getObjectByName('your_object_name');
		    if (popup3d.visible) return;
		
		    popup3d.visible = true;
		    popup3d.material.opacity = 0;
		    createjs.Tween.get(popup3d.material).to({ opacity:1 }, 200)
    }

		loadScript('createjs', '<https://code.createjs.com/1.0.0/tweenjs.min.js>', onLoadScript);