I worked at Rareware in that same era, similarly ridiculous amounts of SGI hardware in the building. As I recall each artist had an SGI Indigo2 and later on the SGI O2 because the standard artist workstation. I believe our lead artist used an SGI Onyx. Programmers had Indy2's with the internal N64 development boards.
There were at least 2 rack mounted SGI machines used for large-scale rendering jobs (ie promotional images, magazine covers etc). May have been SGI Challenges (I know one certainly was) and were kept off-limits to most staff, at the time they were rumored to cost $250k each.
There were at least 2 rack mounted SGI machines used for large-scale rendering jobs (ie promotional images, magazine covers etc). May have been SGI Challenges (I know one certainly was) and were kept off-limits to most staff, at the time they were rumored to cost $250k each.