Following on from the recent post, I tried some thicker and tighter black lines on an old polariser filter.
Filtered on the right. All taken with my 75mm at f1.8, my sharpest lens and shallowest depth (short of macro). The bigger files seemed to be obviously different, but at this size, it is hard to be sure. If anything, the Bokeh drop-off seems more aggressive and smoother, but the unfiltered images have more "brilliance..
Filtered images right side and this time more obvious. Again, softer, lower contrast, less brilliant. There is a slight exposure difference that I did not properly balance out.
First image above is filtered, the second is filtered, but de-hazed, the third un-filtered.
Maybe something half way.