`react-doctor/r3f-webgpu-no-legacy-effect-composer`

Legacy EffectComposer inside an R3F WebGPU Canvas

Category: Bugs
Severity: error
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: react, r3f
Tags: r3f, webgl, react-jsx-only
Default: Enabled

Validate the diagnostic

Confirm the reported code matches this rule before you edit it.

Confirm the reported code matches react-doctor/r3f-webgpu-no-legacy-effect-composer. Compare it with the Before example and verify the same API, framework, and execution context. Treat it as a false positive only when one of those conditions differs.

Compare the code

The corrected pattern shows a focused way to address the diagnostic.

Reported pattern

import { Canvas } from "@react-three/fiber/webgpu";
import { Bloom, EffectComposer } from "@react-three/postprocessing";
<Canvas renderer={createRenderer}>
  <EffectComposer><Bloom /></EffectComposer>
</Canvas>

Corrected pattern

import {
  Canvas,
  useRenderPipeline,
} from "@react-three/fiber/webgpu";
import { bloom } from "three/addons/tsl/display/BloomNode.js";
const Effects = () => {
  useRenderPipeline(({ renderPipeline, passes }) => {
    const sceneColor = passes.scenePass.getTextureNode();
    const bloomPass = bloom(sceneColor);
    renderPipeline.outputNode = sceneColor.add(bloomPass);
    return { bloomPass };
  });
  return null;
};
const scene = <Canvas renderer={createRenderer}><Effects /></Canvas>;

How to fix

Use the corrected pattern as a reference. Preserve behavior that the rule does not require you to change.

Copyable fix prompt

Copy this self-contained prompt into your coding agent after you confirm the diagnostic.

Fix every confirmed react-doctor/r3f-webgpu-no-legacy-effect-composer diagnostic in the current repository. Required change: - Use the renderer's node-based post-processing pipeline instead of @react-three/postprocessing EffectComposer.

Reference transformation:Before:

import { Canvas } from "@react-three/fiber/webgpu";
import { Bloom, EffectComposer } from "@react-three/postprocessing";
<Canvas renderer={createRenderer}>
  <EffectComposer><Bloom /></EffectComposer>
</Canvas>

After:

import {
  Canvas,
  useRenderPipeline,
} from "@react-three/fiber/webgpu";
import { bloom } from "three/addons/tsl/display/BloomNode.js";
const Effects = () => {
  useRenderPipeline(({ renderPipeline, passes }) => {
    const sceneColor = passes.scenePass.getTextureNode();
    const bloomPass = bloom(sceneColor);
    renderPipeline.outputNode = sceneColor.add(bloomPass);
    return { bloomPass };
  });
  return null;
};
const scene = <Canvas renderer={createRenderer}><Effects /></Canvas>;

Constraints: - Confirm the reported code matches the Before pattern. - Make the smallest change that fixes the root cause. - Preserve behavior and interfaces unrelated to this diagnostic. - Reuse existing project components, utilities, and conventions. - Do not introduce render-phase side effects, render-phase state updates, or Hooks rule violations. - Adapt identifiers and framework details instead of copying blindly. - Do not disable the rule or suppress matching code. - Confirm this rule is enabled for the project: react, r3f. Verification: - Run focused tests for the changed behavior. - Run React Doctor and confirm this diagnostic no longer appears. - Report the files changed and any checks you could not run.

More Bugs rules from the rules reference:

react-doctor/r3f-webgpu-no-legacy-material-api: Legacy shader material API inside an R3F WebGPU Canvas
react-doctor/r3f-webgpu-no-unregistered-pipeline-pass: Unregistered WebGPU pipeline pass
react-doctor/react-in-jsx-scope: If on React 17+ with the new JSX transform, disable this rule; otherwise import React at the top of the file.
react-doctor/react-router-descendant-routes-require-splat: Parent path cannot match descendant routes
react-doctor/react-router-guard-aborted-handle-error: Aborted requests are reported as errors

react-doctor/r3f-webgpu-no-legacy-effect-composer