≥30 steps recommended. Note the difference in color between the 20 vs 30 step examples in the gallery.
The strength = 1 used for all example generations.
Some characters are baked in, so they might appear without prompting. This can largely be avoided by negative prompting e.g. "dinosaur, monster" or whatever else you might see that you don't want.
Generally, automobiles will by default be drawn in the style of Cars (the movie)