"OpenGL 20" could refer to a few different things, and the "interesting paper" you're looking for depends on the specific topic. Here are the most likely interpretations: OpenGL 20th Anniversary: Papers or articles reflecting on the 20-year history of the OpenGL specification (originally released in 1992). OpenGL SC 2.0: Technical papers regarding the Safety Critical
If you are learning graphics programming today and see references to "modern OpenGL," you are standing on the shoulders of version 2.0. This article explores the history, core features, technical impact, and legacy of the revolutionary specification. opengl 20