On the importance of punctuation in prompts

[Ehplodor]

Often, commas are used in order to separate concepts in the prompt.

For example, here is some random image :

mountains, snow everywhere, trees, sunshine, rainbow, girl walking towards camera, boots, full-body, masterpiece anime epic digital art, hyperealistic 4k anime anime anime, long red hair
Negative prompt: grainy
Steps: 50, Sampler: DDIM, CFG scale: 7, Seed: 506930935, Size: 512x512, ENSD: 31337

Hand is not correct. Trying some tweak with the negative "bad anatomy" tag :

mountains, snow everywhere, trees, sunshine, rainbow, girl walking towards camera, boots, full-body, masterpiece anime epic digital art, hyperealistic 4k anime anime anime, long red hair
Negative prompt: grainy, bad anatomy
Steps: 50, Sampler: DDIM, CFG scale: 7, Seed: 506930935, Size: 512x512, ENSD: 31337

Not exactly the same result...
Then trying without the comma between negative tags :

The result is definitely different, altough not by much here.

Some more experiment with decreasing the bad anatomy tag attention to zero, with comma :

mountains, snow everywhere, trees, sunshine, rainbow, girl walking towards camera, boots, full-body, masterpiece anime epic digital art, hyperealistic 4k anime anime anime, long red hair
Negative prompt: grainy, (bad anatomy:0)
Steps: 50, Sampler: DDIM, CFG scale: 7, Seed: 506930935, Size: 512x512, ENSD: 31337

and without comma :

mountains, snow everywhere, trees, sunshine, rainbow, girl walking towards camera, boots, full-body, masterpiece anime epic digital art, hyperealistic 4k anime anime anime, long red hair
Negative prompt: grainy (bad anatomy:0)
Steps: 50, Sampler: DDIM, CFG scale: 7, Seed: 506930935, Size: 512x512, ENSD: 31337

Here the difference is much more significant.

I don't know what to do with these results but I think that may be useful to someone so sharing.