[WikiEN-l] Artists' impressions

[Steve Bennett]

Hi all,
  Silly question - are "artists' impressions" (pictures attempting to
illustrate a subject in the absence of definitive information) allowed in
Wikipedia? There are topics where we will never have a free image. Could we
envisage letting editors draw an image, stating clearly that it's simply an
"artist's impression"? Would it violate WP:OR?

Steve