Real time poly animations.
Just want to post this: This page allows to playback some cutscenes (higher-res than Genisis)
Not perfect, though I imagine it's probably a fault of being designed 1:1*. Perhaps there is a better version (allowing modern res), though the Steam version uses an upscale filter instead (maybe because the maps aren't polygonal?). Another World seems to have a better treatment (though Steam says 800MB, so not sure if they rastered it or if they just made the audio uncompressed).
* For a similar problem, some people (One being 'Old Man Yells at Code' on YT) have made newer videos about how classic Sierra games were actually polygons (...at least lines/fill) but don't always properly connect when rendered at higher res (and attempts to re-interpret the data).