Anatomy of a Frame — The Complete Lifecycle of suckless-ogl

Posted on Sun 29 March 2026 in Development • Tagged with OpenGL, C, PBR, IBL, 3D Rendering, GLSL, Ray-Tracing, Post-Processing, Development

Anatomy of a Frame: The Complete Lifecycle of suckless-ogl

From main() to photons on screen — a full deep-dive into a modern OpenGL PBR engine written in C.

The final render of suckless-ogl — 100 PBR spheres lit by IBL

The final render: 100 metallic and dielectric spheres, lit by an HDR environment map, with full post-processing.

Introduction

suckless-ogl is a minimalist, high-performance …


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