assetManager.setLoader(ParticleEffect.class, new ParticleEffectLoader(new AbsoluteFileHandleResolver()));
assetManager.get(DEFAULT_MODEL_PARTICLE, Model.class).materials.get(0).set(new BlendingAttribute(GL20.GL_ONE, GL20.GL_ONE_MINUS_SRC_ALPHA, 1));
//Ui
stringBuilder = new StringBuilder();
Skin skin = assetManager.get(DEFAULT_SKIN, Skin.class);
ui = new Stage();
fpsLabel = new Label("", skin);
pointCountLabel = new Label("", skin);
billboardCountLabel = new Label("", skin);
modelInstanceCountLabel = new Label("", skin);