Original lead designer here. Quora has answers on on the tech stack in this thread: https://www.quora.com/What-was-the-technology-stack-driving-the-original-Ul

Original lead designer here. Quora has answers on on the tech stack in this thread: https://www.quora.com/What-was-the-technology-stack-driving-the-original-Ultima-Online-servers https://www.quora.com/What-was-the-technology-stack-driving-... Reddit has answers on the rendering engine here: https://www.reddit.com/r/gamedev/comments/d3cd2v/anyone_know_how_the_ultima_online_terrain_effect/ https://www.reddit.com/r/gamedev/comments/d3cd2v/anyone_know... I contributed replies to both, but there's further detail from others. There are piles of Ultima Online postmortem materials on my website, https://www.raphkoster.com https://www.raphkoster.com -- and those and more are collected in my book "Postmortems."