Graphics Reference
In-Depth Information
However, why do we want to use this effect in our scene? Firstly, because this is
something that occurs naturally and consequently when the correct amount is applied,
the image becomes more realistic. The second reason is to pull the viewer's attention
to the center of the image hiding any distractions. Once again, there isn't any correct
value for this and the other effects because only the experience and references will tell
you how strong and how discrete the vignette is going to be in your scene.
Lens' errors - chromatic aberrations
The best way to explain what is a chromatic aberration is by having a look at the
following screenshot:
It is painful to watch an image like the previous one, but the effect was exaggerated
in order to be visible. So, the purple fringing, distortion, and the blurred edges are a
combination of errors that are called
chromatic aberration
.
This effect can be found under the
Artistic
tab and is called
Chromatic Aberrations
.
Once again the same question appears: why should we use this effect? The reason
is that these errors are common in photos or movies and adding the correct amount
will help to increase and enhance the realism of our scene. However, we really need
to be cautious with this effect because too much will ruin the image making the
viewers feel repulsed instead of getting attracted to what they are seeing.
