loadCanvas(source, textureOptions = {}, successCallback) {
        this.loader.loadCanvas(source, Object.assign(textureOptions, this._texturesOptions), (texture) => {
            successCallback && successCallback(texture);
        });
    }
This method loads a canvas using the mesh loader (see PlaneTextureLoader class)

     params :
     @source (canvas) : html canvas element
     @textureOptions (object, optional) : Parameters to apply to that texture (see Texture class). Will be merged with the mesh default textures options
     @successCallback (function): callback to execute on source loading success
*