Apply effects only on specific textures

[rafaskb]

First of all, thanks for such a great lib, it's a life-saver, really!

I have a tile-based game and what I'm trying to do is enabling some post-processing effect in the middle of the rendering process, without affecting the previously rendered textures or the next ones. For example, I render floor and walls tiles with Bloom, then monsters with Bloom and MotionBlur, and then some other textures with just Bloom again.

Here is a pseudo code of what I'm doing:

private SpriteBatch batch;
private PostProcessor postProcessor;
private MotionBlur blur;

// Create PostProcessor with a disabled MotionBlur effect
public void create() {
    ShaderLoader.BasePath = "shaders/post-processing/";
    postProcessor = new PostProcessor(false, false, SystemUtils.IS_OS_DESKTOP);
    blur = new MotionBlur();
    blur.setEnabled(false);
    postProcessor.addEffect(blur);
}

public void render() {
    postProcessor.capture();
    batch.begin();
    ... // draw some textures. MotionBlur effect is disabled here
    batch.end();
    postProcessor.render();

    blur.setEnabled(true);

    postProcessor.capture();
    batch.begin();
    ... // draw some textures with MotionBlur enabled
    batch.end();
    postProcessor.render();

    blur.setEnabled(false);

    postProcessor.capture();
    batch.begin();
    ... // draw some textures. MotionBlur is no longer enabled
    batch.end();
    postProcessor.render();
}

What happens is the first batch of textures is not rendered, or is overwritten by the MotionBlur rendering process. What am I doing wrong? Is it even possible to achieve what I'm suggesting?

Thanks for the attention.