backlighting
blending
bloom
bokeh
caustics
chiaroscuro
chromatic aberration
chromatic aberration abuse
diffraction spikes
depth of field
dithering
drop shadow
emphasis lines
film grain
foreshortening
gradient
halftone
image fill
lens flare
lens flare abuse
motion blur
motion lines
multiple monochrome
optical illusion
anaglyph
exif thumbnail surprise
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stereogram
scanlines
silhouette
speed lines
vignetting