The worst spots are not that frequent, but the edge enhancement and aliasing are bad enough by themselves to spoil things.
The only real complaint I have about the graphics is the game's aliasing and flicker.
Optical signals were low-pass filtered at 500 Hz to prevent aliasing .
high-frequency sounds are prone to aliasing
The movie does show a few problems from time to time, including some very bad aliasing and haloing, and some occasional moiré patterns, but for the most part the image is very clean and crisp.
This type of signal distortion is called aliasing .
While you get solid, realistic colors with adequate detail, there is far too much grain, aliasing , and artifacting in the transfer.
Any component of a sampled signal with a frequency above this limit is subject to aliasing .
Analog signals are usually low-pass filtered to remove most or all of the components above the Nyquist frequency in order to avoid aliasing .
Standard-definition content looks good, but brings with it the usual artifacts: noise, line aliasing , and occasional interlacing.