Brace.Object is undefined in chapter.js -- apologies that Object needs to be fully renamed to SceneObject. Please ignore that.

brace.js

(function() {

Brace = {};

define('brace/brace', ['THREE', 'brace/base', 'brace/publisher', 'brace/chapter', 'brace/app', 'brace/object', 'brace/settings'],
       function (THREE, Base, Publisher, Chapter, App, SceneObject, Settings) {

Base(Brace);
Publisher(Brace);
SceneObject(Brace);
Chapter(Brace);
App(Brace);

return Brace;

});

}());

chapter.js

/****************************************
** Chapter.js
**
** Grouping of a set of THREE.js objects
** that combine into a single coherent
** effect for viewing with video support.
**
*****************************************/

(function() {

define('brace/chapter',
       ['THREE'],
       function (THREE) {

return function (Brace) {

    Chapter = function () {
        Brace.Object.call(this);
        this.cameraConfig = null;
        this.state = Chapter.StateNone;
        this.root = null;
        this.video = null;
        this.videoTexture = null;
        this.videoPlaying = null;
        this.settings = null;
        this.app = null;
    }

    // ERROR HERE: Brace.Object is undefined!
    Chapter.prototype = new Brace.Object;

    Brace.Chapter = Chapter;
};

});

}());

object.js

(function() {

define('brace/object',
       ['THREE'],
       function (THREE) {

return function (Brace) {

    SceneObject = function() {
        Brace.Publisher.call(this);
        this.object3D = null;
        this.children = [];
    }

    SceneObject.prototype = new Brace.Publisher;

    SceneObject.prototype.init = function() {};

    Brace.Object = SceneObject;
};

});

})();

publisher.js

(function() {

define('brace/publisher',
       ['THREE'],
       function (THREE) {


return function (Brace) {

    Publisher = function() {
        Brace.Base.call(this);
        this.messageTypes = {};
    }

    Publisher.prototype = new Brace.Base;

    Brace.Publisher = Publisher;

};

});

})();