STEP 6: Prompting
The basics are pretty simple: you put what you want to see in the positive (top) prompt, and you put what you don't want to see in the negative prompt. For example, maybe we'd like our youthful catgirl to have pink hair, a flat(ter) chest, and an innie pussy (no roast beef please). Also, her eyes look a little fucked up, and through a lot of experimentation, I happen to know that adding "slit pupils" to the negative prompt fixes this (I guess the AI isn't sure if a catgirl should have slit pupils or not, and this confusion is what fuckes up the eyes.) Let's try adding some terms to our positive prompt:
"prompt: score_9, score_8_up, score_7_up, score_6_up, score_5_up, score_4_up, source_anime, rating_explicit, naked catgirl bathing in a river, pussy, innie pussy, flat chest, pink hair"
and to our negative prompt:
"source_6, source_5, source_4, big breasts, slit pupils"
The result is Image 1.
For our next trick, let's add an artist prompt. I've found that alpha91 (a hentai artist, look him up) works great as a prompt, and tends to elevate the quality of anime-style porn by quite a bit. In fact, let's add him as a strong prompt. You can make prompts stronger or weaker (make the AI pay more or less attention to them) by putting them in parenthesis and adding :N, where N is a number. :1 is the default strength, :1.1 is slightly stronger, :0.9 is slightly weaker. Let's add (alpha91:1.2) to our prompt, letting the AI know we'd like to see a strong influence of alpha91's work on this piece. Also, the AI seems to have forgotten her tail, so let's also add "cat tail". We get Image 2, which IMO looks quite nice.
Okay enough lying around, let's make her stand up, by simply adding "standing" to the prompt. Also I like the idea that we caught her bathing and she's embarrassed about it, so let's also add "embarrassed, ashamed, scared". We get Image 3.
I like her blush, but I want to see her from behind now, let's get some butts up in here. Adding prompts "rear view", "looking back at viewer", "bent over", and "cute butt" to the prompt, we get Image 4.
Why isn't she wet? She's been bathing, she really should be wet, right? Adding (wet:1.2) and (wet hair:1.2) should do it. Let's also make her a foxgirl instead (also switching out "cat tail" to "fox tail", of course). Image 5 is the result.
An important tip for finding good keywords: if you're not sure how to phrase something, google "<concept> danbooru". These models were trained largely on danbooru tags, and they understand them very well. For example, if you want to make a character skinnier, you might try "thin" as a keyword, which will not work. Googling "thin danbooru" will reveal that the term you want is "skinny", or maybe "slim".
Okay I'm bored and horny now, and this is more than enough to get you prompting effectively. We have only barely begun, though, so I'll probably do some more advanced lessons later.