processing/p5.js-website

[p5.js 2.0+ Bug Report]: Framebuffer example breaks on 2+

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#1,571 opened on Jun 18, 2026

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Description

Most appropriate sub-area of p5.js?

  • Accessibility
  • Color
  • Core/Environment/Rendering
  • Data
  • DOM
  • Events
  • Image
  • IO
  • Math
  • Typography
  • Utilities
  • WebGL
  • WebGPU
  • p5.strands
  • Build process
  • Unit testing
  • Internationalization
  • Friendly errors
  • Other (specify if possible)

p5.js version

2+

Web browser and version

chrome

Operating system

macos

Steps to reproduce this

Steps:

  1. https://beta.p5js.org/examples/3d-framebuffer-blur/ observe somethign strange happening (intended: https://p5js.org/examples/3d-framebuffer-blur/). Instead of row of rotating spheres there's a smear of crescent shapes that fades into nothing
  2. if pasting code into p5.js editor, and select 2.3 in version, a whole other also strange behavior (also no syntax highlighting after 2.2?)

Contributor guide

Research direction
Review the Framebuffer blur example code in the website repository. Compare the code with the p5.js 2.0 API changes for WebGL and framebuffers. Look for deprecated methods or incorrect usage that could cause the rendering issue. Test locally with the beta version to reproduce the bug and inspect console output.
Tech stack
javascript
Domain
frontend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
GitJavaScriptp5.jsWebGL
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65