B. Intention of Producer 1. Portrayals of surrogates . Artifacts intended to yield a vicarious perception, i.e., to reproduce or represent, by displaying some of the same structures of light as would the original. Conventional non-portrayals . Artifacts not intended to represent but displaying agreed-upon graphic symbols.
Examples are signals, signs, ideographs, alphabetic letters, numbers, writing.
Invented structures . Artifacts not intended to represent anything nor to employ graphic conventions but only to display the possibilities of optical structure as such, considered as stimulation independent of its source. As opportunity for pure discrimination, this interests both artists and psychologist. Examples are decorations, design, mathematical construction, modern paintings. Simple or complex repetitive or lawful patterns.