Two viewport with different object

[JaRe]

Maybe your Node needs some updates?

Trouble with viewport with its own rootNode

You mean maybe RootNodeAppState? Incidentally, that would be a text for the hotfix of the documentation: That would warn one or the other. By the way (when I see SimpleApplication.update() ) it doesn’t have to look RootNodeAppState like this: @Override public void update(final float tpf ) { super.update(tpf); AppProfiler prof = getApplication().getAppProfiler(); try { if (prof != null) { prof.appStep(AppStep.SpatialUpdate); …

See

@Override
    public void render(RenderManager rm) {
        super.render(rm);

        rootNode1.updateGeometricState();
        rootNode2.updateGeometricState();
    }