It can be run lazily in two ways: first, you can lazily add detail (ie, render down to a specific level of detail and postpone the rest); second, you can lazily

It can be run lazily in two ways: first, you can lazily add detail (ie, render down to a specific level of detail and postpone the rest); second, you can lazily build grid blocks out to the horizon (eg, for walking around a terrain first-person). So detail vs size laziness.