should rengar be able to see trough nocturne ultimate?

By that logic Nami should instantly kill Brand.

i can make a fire and see in the dark

Cas can'tsee in the dark. They can see better in lower levels of light than humans, but they cant see in actual darkness

nocturne only turns off the light but rengars ultimate makes him smell his targets or feel them with instinct but he doesnt actually see them, thats why he doesnt have vision on them but only grasps their presence, like red sweeper.