Let's not put words in his mouth. I have a similar experience that is not exactly gamey. It has to do more with contrast, and antialiasing transparency though.
I can have the highest details or lowest details on and yet, when in direct contact with a plane that I am chasing, the wings DO blend with the terrain. I have been able to defeat this ABNORMAL blending to give a more reallistic (in my opinion) representation of what my eyes would be able to see while in direct contact.
This may not be as large a problem to those with larger monitors, or better eyesight. I on the other hand, went to a 22 or 23 in screen I forget which and different magnification glasses. The effect is still there, unless I turn my SHARPNESS, BRIGHTNESS, CONTRAST settings to an acceptable range.
The antialiasing filters and such also add to the strain on the systems resources so I try to keep these settings as tweaked as possible without adjusting. I have played with these settings almost from the day that I discovered the ability to do so for my game. I still think the blending is unreallistic but still fun.
I guess that I could post some screen shots to show what I mean, but it is most evident, I believe, if you have eye problems (I do

) and find that the plane that you where dead on it's 6 slipped under your nose and you had no indication of where it went or when it began to make it's move.
Try this first:
- Turn the SHARPness up on your monitor while playing and test
- Next, if above doesn't help, move the Antialiasing slider to none and test
See which of the above features is more helpful and then try to find a happy medium between artificial lines and a more natural but still identifiable line between the planes and the terrain.
Let me know please.... I continue to tweak my settings to help, maybe I can learn something from your experiments.