Even with perfect frame-pacing, 30 FPS never really feels smooth to me.
A good motion blur implementation can help a lot, but does not fix the problem and is obviously blurring the image instead.
Depending on the display, it ranges from being completely unplayable and a source of motion sickness, to just being
tolerable.
Many people have said that
FFVIIR looks "really smooth" and I've even seen some say they thought it was running at 60 FPS.
That was not my experience at all. To me, it was immediately identifiable as running at 30 FPS.
It makes a difference in nearly every game.
It's important to note that this behavior varies depending on the display type, and even how it is configured.
- With impulse-type displays (CRT, DLP, Plasma, or anything with BFI enabled) you will see double images like the ones in that photo - which is of an old CRT monitor of mine running at 96Hz.
- With sample-and-hold displays (LCD, LCoS, OLED TV) you should see motion blur instead of double images.
But things are not so simple.
While LCD displays are typically driven using sample-and-hold, the backlight may use PWM either as a method of brightness control, or as a power-saving measure.
Instead of seeing clean motion blur, you will see multiple images displayed depending on the PWM rate - which is typically going to be several times higher than 60Hz.
Here's an example of this from TFT Central's page on PWM:
OLEDs are considered to be "flicker-free" sample-and-hold displays and have very quick response times, so they should in theory produce clean motion blur, but there is actually a slight flicker between frames - as shown in RTINGS' review of the C9 OLED:
You won't see that with a PWM-free LCD - it'll be a completely flat line.
But you do have slow response times on LCD, which can result in the appearance of double images when you still have an after-image of the previous frame.