Saving EffectComposer result to render target

Questions
1

I want to tell my EffectComposer to edit a renderTarget, and then I render that renderTarget to the canvas to see if everything is working properly, but it is blank!

But when I tell EffectComposer to directly render to the screen, I can see my effect… (I need to render my effects to a renderTarget because I will do some further processing on the renderTarget)

So how can I ensure that my EffectComposer is saving its final result to my renderTarget? I already define my render target on EffectComposer’s second parameter, so I don’t know whats wrong!

code

    const renderTargetForGlowingObjects = new THREE.WebGLRenderTarget(innerWidth, innerHeight, { 
      minFilter: THREE.LinearFilter, magFilter: THREE.NearestFilter
    });

    const bloomComposer = new THREE.EffectComposer(renderer, renderTargetForGlowingObjects);
    bloomComposer.setSize(innerWidth, innerHeight);
    bloomComposer.renderToScreen = false;
    bloomComposer.addPass(renderScene);
    bloomComposer.addPass(bloomPass);

And I call bloomComposer.render() on the animation loop.

2

After calling bloomComposer.render(), use bloomComposer.renderTarget2.texture to get the result as a renderTarget.