//benkyouBanner.getScreen().setMaterial(mat_stl);
/**
* Sets flycam to work in JPanel and increases camera movement speed
*/
camSys = new DefaultCamSystem(flyCam, cam);
terrainSystem = new TerrainSystem(assetManager);
rootNode.attachChild(terrainSystem.getTerrain());
//craetes a simple sky for the world
sky = new SkySystem(assetManager);
rootNode.attachChild(getSky().getSky());