July 23, 2026
Shader? I barely know her
Learn OpenGL, extensive tutorial resource for learning Modern OpenGL
The internet found a free 3D graphics guide — and instantly started arguing over whether it’s a classic or already ancient
TLDR: LearnOpenGL is a free, long-running online guide for making 3D graphics, and many commenters say it’s one of the best beginner resources out there. But the thread quickly turned into a fight over whether it’s still worth learning today or if newcomers should skip straight to newer tools.
A free online book called LearnOpenGL is making the rounds as a friendly, step-by-step guide to building 3D graphics from scratch, with a matching print edition for people who still love the smell of paper. On paper, this sounds like a wholesome win: it’s free, beginner-friendly, and packed with examples. But in the comments? Instant nostalgia, practical praise, and a tiny civil war about whether newcomers should even bother learning it at all.
The warmest reactions came from people who say this guide basically saved their sanity. One reader praised it for finally making the scary setup process understandable, even while admitting it can hop between slightly different setups in a way that may leave beginners muttering at their screens. Another commenter went full memory-lane mode, recalling how the tutorial helped them build a Minecraft-style clone years ago and calling it the most useful OpenGL resource by a mile. That’s the kind of endorsement that hits like a movie trailer voice-over: “This tutorial raised my blocky child.”
Then came the drama. One person simply asked how to use the same ideas in Microsoft’s .NET/C# world, and another swooped in with alternatives, basically saying: sure, learn the concepts here, but maybe use easier tools in real life. And then the hottest take landed: in 2026, “Please don’t learn this; it’s obsolete.” Oof. So the mood is clear: many see LearnOpenGL as a beloved gateway drug into graphics programming, while others are already yelling from the back that the future has moved on. Classic internet: one person finds a great free book, and five others turn it into a generational debate.
Key Points
- •LearnOpenGL is a free online book focused on teaching modern core-profile OpenGL from beginner to advanced levels.
- •The resource is designed to be clearer and more complete than many older OpenGL materials that focus on immediate-mode OpenGL.
- •The tutorial covers graphics fundamentals, how OpenGL renders pixels, and practical techniques such as lighting, scene traversal, model loading, and post-processing.
- •A walkthrough series is included to help readers build a small game using the OpenGL knowledge taught in the chapters.
- •The project also offers a physical print edition and a free PDF version, with the article stating that the website and book contain the same content.