public void beginRenderOverlay() {
    if (effectsTexture == null || !effectsTexture.isLoaded()) {
      return;
    }

    defaultTextured.activateFeature(ShaderProgramFeature.FEATURE_ALPHA_REJECT);
    defaultTextured.enable();

    glBindTexture(GL11.GL_TEXTURE_2D, effectsTexture.getId());

    glEnable(GL11.GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  }