Meaning of illustrative

Do the both highlighted "illustrative"s in the following text have the same meaning? The second one clearly means "being explanatory" but I am not sure whether the first one means "being explanatory" or "including images and being pictorial". What is your idea?

Context:

This is inspirational for thinking about art as being newly produced from the encounter between different registers of signification rather than simply being an illustrative translation of desires and feelings. Hiller’s research into the cultural implications of dream analysis in her writings, as well as her artwork, can usefully extend Freud’s approach into the field of art. She categorises artists’ dream images into three categories: ‘the illustrative or descriptive, which picture or illustrate dream imagery of a more or less conventional kind, the documentary or artefactual, which attempt to achieve a kind of accurate reportage; and the evocative, which are meant to trigger off an experience similar to a dream’.