I worked with Bryce 7 last year and rendering a short animated scene at like 20 seconds at 15 FPS with era appropriate resolution still took around 40-50 minutes or so.
Link didn't embed in QT so just making a separate post:
The Infinite Mac emulator - infinitemac.org/1993/System%207.1.1 - has Bryce 1 under "Infinite HD - Graphics - KPT Bryce", if anyone feels like rendering their own space landscapes