IIRC the customers supplied the primary graphics content for the signs digitally from their own files; the underestimated development cost was finding and editing the appropriate instances of the signpost objects. The corridor rock walls were a generic texture. There were also lots of physical 'emergency exit this way' indicators (e.g. arrow shapes that could be felt by touch in darkness) on railings. These were instanced as well, but the direction had to be checked.
> Can drones fly effectively in a mine?
No idea but think lots of corridors with short Line Of Sight. Probably easier now to use Lidar or similar.
[Edit] Also, some of the signs were dynamic, e.g. "Checked by X on date Y" and needed to be updated in a scenario-specific way.
IIRC the customers supplied the primary graphics content for the signs digitally from their own files; the underestimated development cost was finding and editing the appropriate instances of the signpost objects. The corridor rock walls were a generic texture. There were also lots of physical 'emergency exit this way' indicators (e.g. arrow shapes that could be felt by touch in darkness) on railings. These were instanced as well, but the direction had to be checked.
> Can drones fly effectively in a mine?
No idea but think lots of corridors with short Line Of Sight. Probably easier now to use Lidar or similar.
[Edit] Also, some of the signs were dynamic, e.g. "Checked by X on date Y" and needed to be updated in a scenario-specific way.