Dictator On top of the texture and shadow improvements, I believe that the "Enhanced" setting also affects some of the environmental models.
Original:
Enhanced:
Flip back and forth between these two images and you can actually see a fairly pronounced difference between the Pelicans. Less noticeable, but you can also spot differences on the cars to the right.
Original:
Enhanced:
Observe the closest tree to the right. On "Enhanced" it is thicker and more detailed. Not sure if this is LOD related, as only that one tree seems to be affected in this set of screenshots.
I also noticed something very peculiar while looking at these screenshots though. Compare the textures of the Battle Rifle and Master Chief in both screenshots labeled "Original" and you'll see that the textures on the Delta Halo screenshot are even lower res. I checked and triple checked to make sure that I wasn't actually on the "Performance" setting, and both screenshots were definitely taken on the "Original" setting. Odd.
Here's some more weirdness. On my girlfriend's PC, the game just refuses to load the higher res textures when using the "Enhanced" setting. Compare this with the "Enhanced" screenshot above—same improved Pelican model and shadows, but the textures are a match for the "Original" screenshot. Both of us have a GTX 1060 GB by the way.
One more pair of screenshots, as I've posted enough large screenshots already. I comfortably play H2A at a locked 60 at 2880x1620 (except for the stuttering, which I'll get to in a sec), except when heavy smoke effects are on-screen. This isn't all smoke effects, as the smoke from the fires at the beginning of the Outskirts mission at the crash site don't do this. But the smoke from a damaged vehicle can take a massive hit on your frame rate. This is what it can look like at its worst, as I'm standing right in middle of a wrecked Scorpion:
Here's a less extreme example, where I'm not standing directly in the thick of it, but it's still doing a number on the framerate.
Anyways, just a few of my own observations on this port. As for the stutters, they remind me a lot of the shader cache stuttering that's present in the Dolphin Emulator as they seem to clear up completely when replaying a level or even just reverting to your last checkpoint after playing a particular section.
