I used Krita to tweak and color the pictures, then ran the resulting image through DreamStudio again. Since DreamStudio added some triangles into the picture without my asking, I rewrote the prompt to reflect that change, and now they are mountains.
Here's a sneak peek into the next one:
My first prompt was: "A sketch of a rabbit in a jacket and jeans having a glass of wine in front of a car and a log cabin."
It has now evolved a bit.