I tried those settings, the sliders and pushing gamma up to 1.4, it had no effect on the tracers, smoke trails, or hit sprites for me. I had been experimenting with shadows "off", and when doing so, gamma at 1.4 and the other setting at 4.0 - it whites everything out so bad it's like staring into a flashlight, you can't see the convergence lines in the hangar, and buildings look a blinding white, so no go on combining any of these with shadows OFF. Shadows ON, it's easy to see the effects, but again, zip difference on the tracers.
Conditions where the tracer lines are all but invisible when airborne, when you hit f3 and go outside, you CAN see them, bright as day, but in the cockpit, they are absolutely not there, I've filmed this to show the effect, and then taken the identical plane in AH2 offline and recreated the test, and the difference is pretty huge. Again, I don't specifically mind, as I think it'll add a whole new interesting dimension to aerial gunnery in the game, making it MUCH more difficult to be accurate, but I'm still concerned it's going to be a possibly negative issue with a whole pile of players when the 1.0 day comes if they look and function as is. I said before that I think there will be a swath of complaints about not being able to hit anything, rubber bullets, my tracers don't work, wah, etc and etc.
One thing of note, IMO those who zoom a lot when they shoot (I'm a perpetual zoomer, I have to fight to make myself NOT zoom in at ranges like 300 or less) are going to see more of these "issues", or "features" depending on your point of view I guess. When zooming the tracers are much different than AH2 as described in all the previous posts I've made, at least on my systems with various settings and resolutions tested. When NOT zoomed, the effects changes aren't nearly as noticeable.
It'll all work out, again, I'm not the least bit fussed myself, just interested, and again, think that the masses are IMO going to complain. Shooting accurately and being able to make wide angle deflection shots is such a huge part of the game that experience is greatly responsible for, and I've found that I've had to make enough adjustments in AH3beta that it's almost been like starting over for me. Again, not a bad thing, it's actually been a lot of fun offline figuring out what works best for me - again, it's absolutely different on my setup, regardless of what settings changed both in game, NCP, or on the Asus monitor settings.
I did set my K4 convergence to 650 to practice some long range tater lobs, WOW can you really see the arc and trajectory difference now compared to AH2, I filmed a bunch of that at 1440p too, pretty cool beans. This beta offline experience has really been burning a whole in my pocket, waiting for the 1.0 version day. I'm betting we see some 400 player nights in the first week, and more from there.