//Batches
pointSpriteBatch = new PointSpriteParticleBatch();
pointSpriteBatch.setCamera(worldCamera);
billboardBatch = new BillboardParticleBatch();
billboardBatch.setCamera(worldCamera);
modelInstanceParticleBatch = new ModelInstanceParticleBatch();
particleSystem.add(billboardBatch);
particleSystem.add(pointSpriteBatch);