{22} One attraction in Snyder's position is its compatibility with recent work in the philosophy of perception.
For a number of years, philosophers explained vision in terms of mental images or causal roles.
 Both of these devices had difficulty accounting for certain phenomena like hallucination and (arguably) pictorial perception.
Recently adverbial theories of vision have become more popular.
On the adverbial theory, seeing a red object can be describing as seeing an object redly.
On Snyder's view seeing p as a picture of O could be described as seeing p pictorially and O-ly together with seeing O pictorially and O-ly.
 A formal development of this view of perception is offered by M. Tye
in "The Adverbial Approach to Visual Experience," <i>The Phil. Review</i> (1984).