In this paper Wollheim's and Walton's theory of pictorial representation are scrutinized and compared with each other. Wollheim holds that the perception of pictorial representation can be explained through seeing-in, a special visual capacity contrasted with seeing-as, which is a development of ordinary vision of straightforward perception. The characteristic features of seeing-in are as follows: 1) with seeing-in we may see not only objects but also states of affairs, while with seeing-as we can see only objects, 2) there is the requirement of localization to seeing-as, while it is contingent to seeing-in, 3) seeing-in can see both the medium and the represented, while seeing-as cannot. The last feature is called twofold- ness. A...