The level might be horrible on legendary but if you look around and stuff it might be the most beautiful and disgusting level bungie has done with Halo and i don't think 343 will top it in level design and art direction now don't call me a hater but just boot up halo 3 and the level cortana and just look around you can see so much going on.
Small note
no i don't hate 343 i just think they should take more time on the art side off it all.
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The art in Halo 4 was breathtaking. That moment in the beginning when you first drive the warthog into that forerunner clearing with the giant pylons in the distance... Beautiful.