Assertion: doom's level | /r/HasProperty | small
Facets:
value: as a single stair step
type: MANNER
Source sentences:
text: This concept was also used for the lighting system: rather than calculating how light traveled from light sources to surfaces using ray tracing, the engine calculates the "light level" of a section of a level, which can be as small as a single stair step, based on its distance from light sources.