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OpenGL 2.0: The Revolution That Brought Shaders to the Masses

If the previous versions of OpenGL were about using a "fixed-function" menu of options, OpenGL 2.0 was about giving programmers the kitchen and letting them write their own recipes. The Programmable Pipeline: GLSL Takes Center Stage opengl 20

This simplified the rendering of particle systems (like smoke, fire, or sparks) by allowing a single vertex to be rendered as a textured square. OpenGL 2

By making these stages programmable using a C-like syntax, OpenGL 2.0 enabled visual effects that were previously impossible in real-time, such as per-pixel lighting, procedural textures, and advanced bump mapping. Key Features of OpenGL 2.0 Key Features of OpenGL 2

Earlier versions required texture dimensions to be powers of two (e.g., 256x256). OpenGL 2.0 allowed textures of any size, significantly reducing memory waste and simplifying asset creation.

This allowed a single shader to output data to several buffers at once. This was the foundation for "Deferred Shading," a technique used by almost every modern AAA game engine to handle hundreds of light sources efficiently.