How classic Sierra game graphics worked (and an attempt to upscale them)

Back in 1984, Sierra On-Line's adventure games dominated the PC game scene. Did you ever wonder how they fit such awesome graphics in so little disk space? This video explains how they did it. It also goes a step further and examines a new approach for upscaling them to high definition. 00:00 Introduction 01:25 AGI's technical achievement 02:08 How efficient was it? 02:28 Could it be upscaled nicely? 02:58 The Flood Fill problem 03:24 My approaches 04:44 The result Upscaler source code on Github: https://github.com/eviltrout/agi-upscale I found the ScummVM AGI specifications invaluable when coding this: https://wiki.scummvm.org/index.php?ti... Follow me on Twitter:   / eviltrout