"A DSLR portrait of..." means nothing and if the phrase influences the output of a generative model, in a way different from "A photograph of...", that implies the model has learned something stupid.
Arxiv link seems to be broken, here is the correct one: <a href="https://arxiv.org/pdf/2306.03038.pdf" rel="nofollow">https://arxiv.org/pdf/2306.03038.pdf</a>