  Text-guided synthesis of images has made a giant leap towards becoming a
mainstream phenomenon. With text-to-image generation systems, anybody can
create digital images and artworks. This provokes the question of whether
text-to-image generation is creative. This paper expounds on the nature of
human creativity involved in text-to-image art (so-called "AI art") with a
specific focus on the practice of prompt engineering. The paper argues that the
current product-centered view of creativity falls short in the context of
text-to-image generation. A case exemplifying this shortcoming is provided and
the importance of online communities for the creative ecosystem of
text-to-image art is highlighted. The paper provides a high-level summary of
this online ecosystem drawing on Rhodes' conceptual four P model of creativity.
Challenges for evaluating the creativity of text-to-image generation and
opportunities for research on text-to-image generation in the field of
Human-Computer Interaction (HCI) are discussed.
