Question

Anyone out there who knows what are the differences between BasicRenderEngine and LazyRenderEngine?

Answer 1

Well after playing a little bit there seems to be no differences other than some get/set methods and the way they are instantiated.

var lazy:LazyRenderEngine = new LazyRenderEngine(scene, camera , viewport);
lazy.render();

var basic:BasicRenderEngine = new BasicRenderEngine();
basic.renderScene(scene, camera, viewport);

Maybe the LazyRenderEngine is useful if you want to have multiple render engines with different setups.