Untitled

public PerspectiveCamera cam = new PerspectiveCamera(80, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
public FrameBuffer FBO;
public TextureRegion fboRegion;
public ModelBatch modelBatch;
public SpriteBatch spriteBatch;

create(){
        FBO = new FrameBuffer(Format.RGBA4444,Gdx.graphics.getWidth(),Gdx.graphics.getHeight(),false);
        fboRegion = new TextureRegion(FBO.getColorBufferTexture());
        fboRegion.flip(false, true);
}

render(){
gl.glViewport(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
gl.glClearColor(0, 0.5f, 0.9f, 1);
gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);

cam.update();

        FBO.begin();
        modelBatch.begin(cam);
                modelBatch.render(modelInstance1, environment);
                modelBatch.render(modelInstance2, environment);
        modelBatch.end();
        FBO.end();

        spriteBatch.begin();
                fboRegion.setTexture(FBO.getColorBufferTexture());
                spriteBatch.draw(fboRegion, 0, 0);
        spriteBatch.end();

}