skybox.setTexture(Skybox.Face.Down, down);
//skybox.preloadTextures();
CullState cullState = (CullState) wm.getRenderManager().createRendererState(RenderState.RS_CULL);
cullState.setEnabled(true);
skybox.setRenderState(cullState);
ZBufferState zState = (ZBufferState) wm.getRenderManager().createRendererState(RenderState.RS_ZBUFFER);
//zState.setEnabled(false);
skybox.setRenderState(zState);
FogState fs = (FogState) wm.getRenderManager().createRendererState(RenderState.RS_FOG);
fs.setEnabled(false);
skybox.setRenderState(fs);