John Carmack is such an inspiration. It was his early blog that taught me the techniques for raycast engines. I was working at an educational software company

John Carmack is such an inspiration. It was his early blog that taught me the techniques for raycast engines. I was working at an educational software company in my home town, we were doing a 2D educational game for Famous Five on a Treasure Island. I convinced my boss to allow me to make the bit where they go into a dungeon to be 3D, and I wrote a raycast engine for it. Not long after that, I used it to get my first job in the London games industry as a Playstation 1 lead programmer! His willingness to share what he's learned must have given many programmers a boost, as it did with me. Well deserved.