Can postProcessing provide configuration items?

[wang1212]

Is your feature request related to a problem? Please describe.

I checked the source code and found that post-processing is enabled by default, and the official example module provided by threejs is used in the source code. However, the example modules officially provided by threejs are actually not very efficient in rendering, and the community seems to have more efficient solutions, such as postprocessing.

The library doesn't seem to expose an api that could replace the postprocessing library?

Describe the solution you'd like

The tool library can provide a configuration item that allows customizing the post-processing tool library to be used.

Describe alternatives you've considered

Additional context

[vasturiano]

@wang1212 thanks for reaching out.

I'm not too familiar with integration details of that post-processing alternative, but could you possibly pass it as an additional renderer (via the extraRenderers config option)?

[wang1212]

@vasturiano Thank you very much for your prompt reply.

extraRenderers config doesn't seem to fit the needs. (will cause each frame to be re-rendered twice)

---

But I can give the comparison code of the two alternatives, it is as follows:

-import { EffectComposer } from 'three/addons/postprocessing/EffectComposer.js';
-import { RenderPass } from 'three/addons/postprocessing/RenderPass.js';
-import { UnrealBloomPass } from 'three/addons/postprocessing/UnrealBloomPass.js';
+import { EffectComposer, RenderPass, EffectPass, BloomEffect } from "postprocessing";

const composer = new EffectComposer( renderer ); // note: EffectComposer is a different implementation
composer.addPass( new RenderPass( scene, camera ) ); // note: RenderPass is a different implementation

-composer.addPass( new UnrealBloomPass() );
+const effectPass = new EffectPass(camera, new BloomEffect(), ...extraEffects ); // EffectPass is something new
+composer.addPass( effectPass );

raf(() => {
   composer.render();
});

Combined with the above code, it is actually how to allow users of three-render-objects to replace the implementation of EffectComposer and RenderPass.