The article focuses on teaching software rendering using a minimal C++ codebase, specifically around 500 lines. The author aims to simplify the learning process for 3D graphics APIs like OpenGL and Vulkan by guiding students through creating a basic software renderer from scratch. The approach emphasizes understanding the fundamentals of rendering without relying on external libraries, which is crucial for grasping how graphics libraries operate in practice. Students start with a basic setup that includes a single class for handling TGA image files, a format that supports RGB and grayscale images. The initial exercise requires students to render a 64x64 pixel image by manually setting pixel colors. They learn to draw lines and triangles without built-in functions, which is an essential part of the learning experience. The author provides source code to facilitate understanding but discourages direct copying, as hands-on practice is key to mastering these concepts. The tutorial's objective is to produce a rendering from a 3D model composed of a triangulated mesh and textures. The process takes students about 10 to 20 hours to reach a competent level of coding. The article includes practical instructions for compiling the code, using CMake to build the project, and ultimately generating a TGA image file named "framebuffer.tga." This structured approach aims to build a solid foundation in 3D graphics rendering techniques.