Software rendering implemented in 500 lines of bare C++ demonstrates a minimal 3D graphics pipeline without external libraries. The article, posted on Hacker News, outlines a series of lectures designed to teach the fundamentals of graphics APIs such as OpenGL, Vulkan, Metal and DirectX by building a simple software renderer from scratch. The demo accepts a triangulated mesh with textures as input and produces a rendered image saved as a TGA file. It relies on a single TGA handling class and implements pixel setting, line drawing and triangle rasterization manually, without built‑in drawing functions. The source code is hosted on GitHub, and the initial student code is available via a linked repository. Compilation requires cloning the repository, running CMake, and building the executable, which reads OBJ model files and writes framebuffer.tga. The program runs headless and generates a 64 × 64 image that is displayed after scaling. The author notes that performing the implementation personally is essential for understanding graphics concepts, and the code serves as an educational resource for developers.