There is currently significant visual artifacts when using scopes with TAA antialiasing.
This screenshot is taken with no antialiasing enabled. Notice that the image is quite crisp and there are no artifacts. (I am actually really impressed that you guys managed to make the scope zoomed render actually fit the screen pixels and produce such an amazingly clear effect!)
This screenshot is taken with Very High antialiasing (TAA). There is significant temporal artifact in foliage when moving your view, as you can see in this screenshot (taken while moving the mouse quickly). This issue does not occur without zooming in with a scope.
My scope detail settings are on High. Note that even the passive amount of scope movement due to sway can less-noticeably introduce this artifact, so it's a pretty urgent visual glitch that can really affect the look of the game and should certainly be fixed ASAP.