Recommended Settings:

Excessive negative prompt can makes your creations worse, so follow my suggestions below!
Before applying a LoRA to produce your favorite character, try it without first. You might be surprised what this model can do!

A1111 my settings:

I run my Home PC A1111 with this setting:

set COMMANDLINE_ARGS= --xformers

if you can't install xFormers (read below) use my Google Colab Setting:

set COMMANDLINE_ARGS= --disable-model-loading-ram-optimization --opt-sdp-no-mem-attention

My A1111 Version: v1.6.0-RC-28-ga0af2852 • python: 3.10.6 • torch: 2.0.1+cu118 • xformers: 0.0.20 • gradio: 3.41.2

If you want activate xformers optimization like my Home PC (How to install xFormers):

In A1111 click in "Setting Tab"
In the left coloumn, click in "Optimization"
in: "Cross attention optimization" select: "xformers"
Press in "Apply Settings"
Reboot your Stable Diffusion

If you can't install xFormers use SDP-ATTENTION, like my Google Colab:

In A1111 click in "Setting Tab"
In the left coloumn, click in "Optimization"
in: "Cross attention optimization" select: "sdp-no-mem - scaled dot product without memory efficient attention"
Press in "Apply Settings"
Reboot your Stable Diffusion

How to emulate the nvidia GPU follow this steps:

In A1111 click in "Setting Tab"
In the left coloumn, click in "Show all pages"
Search "Random number generator source"
Select the voice: "NV"
Press in "Apply Settings"
Reboot your Stable Diffusion

If you use my models, install the ADetailer extension for your A1111.

Navigate to the "Extensions" tab within Stable Diffusion.

Go to the "Install from URL" subsection.
Paste the following URL: https://github.com/Bing-su/adetailer
Click on the "Install" button to install the extension
Reboot your Stable Diffusion

How to install Euler Smea Dyn and Euler Max Sampler:

In A1111 click in "Extensions Tab"
click in "Install from URL"
Under "URL for extension's git repository" put this link: https://github.com/licyk/advanced_euler_sampler_extension
Once installed click in: "Installed" Tab
Click in "Apply and quit"
Reboot your Stable Diffusion
Now at the end of the list of the sampler, you have the new sampler.

How to use ADetailer with Euler Smea Dyn and Euler Max Sampler:

In A1111 click in "txt2img" tab
Expand and click in "enable ADetailer"
Scroll down and expand "inpaint" section
Click and turn on "Use separate Sampler"
Now select: "DPM++ 2M Karras" (or your favourite sampler)

VAE: VAE is included (but usually I still use the 840000 ema pruned)
Clip skip: 2 or 3
Upscaler: 4x-Ultrasharp or 4X NMKD Superscale

NORMAL GENERATION SPOT that I found is:

Sampling method: Restart
CFG 7 -> Steps 25
Width: 576 (or 768)
Height: 1024

or:

Sampling method: DPM++ 2M SDE Karras
CFG 5 -> Steps 20
Width: 576 (or 768)
Height: 1024

or:

Sampling method: Euler A
CFG 5 -> Steps 20
Width: 576 (or 768)
Height: 1024

SUPERFAST GENERATION SPOT that I found is:

Sampling method: Euler (or Euler a)
CFG 2~3.5 -> Steps 10~15
Width: 576 (o 768)
Height: 1024

IN GENERAL FOLLOW THIS ADVICE:

As the CFG scale are raised, the steps must be raised. This is a kind of guideline:

CFG scale: 2~3 -> Steps: 10~15

CFG scale: 3~4 -> Steps: 15~20

CFG Scale: 4~5 -> Steps: 20~25

CFG Scale: 5~6 -> Steps: 25~30

CFG Scale: 6~7 -> Steps: 30~35

I didn't go any further, but it could (I say this theoretically) also work beyond 7, always increasing the steps step by step

As for the prompts... it's hard to help you here either.

They change based on what you want to do, whether realism, anime, cgi and so on.

I recommend you download an image from the main gallery and insert it into the PNG info tab to get the prompt used.

I also leave you, downloadable from here, my style.csv file with all the prompts I used. Just overwrite (if it is empty) the one in your Stable Diffusion folder (A1111)

MY FAVORITE PROMPT:

Realistim Prompt:
(masterpiece, best quality, highres:1.2), (photorealistic:1.2), (film grain:1.3), (morbid light:1.2), (dynamic angle), raw photo, ->YOUR PROMPT<- , moonlight passing through hair, (random beautiful background:1.3), (sharp), exposure blend, bokeh, dim light, (hdr:1.4), high contrast, (muted colors, dim colors, soothing tones:1.3), low saturation, morbid
Negative for Realism:
cartoon, painting, illustration, (grayscale:1.4), normal quality:1.8, ugly, 3D rendering,
Hyper Realism Prompt (thanks to stapfschuh:):
(((Ultra-HD-quality-details, real-photo-realistic, ideal))) ->YOUR PROMPT<-
Negative for Hyper Realism
3D-rendering:2, cartoonified:2, negative_hand-neg, bad-hands-5, (shadows on the face), (front light), ugly, fat, mole, moles, naked, nude, braless, cross, sepia, black&white, B&W, painting, drawing, illustration, octane
Anime Prompt:
(#2D Anime Style), masterpiece, best quality, 2D anime, ->YOUR PROMPT<- dutch angle, cinematic, volumetric lighting, soft lighting, rim lighting,
Negative for Anime:
(worst quality, low quality), negative_hand-neg, bad-hands-5, realistic, photorealistic, photograph, NSFW, photorealism, realism, 3D, sepia, black&white, B&W,
Pixar Prompt:
(masterpiece, best quality, highres:1.2), (Pixar CGI Style), (colorful), ->YOUR PROMPT<- Pixar-style, Character Design, CGI, 8k
Negative for Pixar:
(worst quality, low quality), negative_hand-neg, bad-hands-5, realistic, photorealistic, photograph, NSFW, photorealism, realism, 3D, sepia, black&white, B&W,
Disney Prompt:
(#Disney CGI style), (masterpiece, best quality, highres:1.2), (intricate and beautiful:1.2), ->YOUR PROMPT<- (detailed light:1.2), (soft lighting, side lighting, reflected light), (colorful, dynamic angle)
Negative for Disney:
(worst quality, low quality), negative_hand-neg, bad-hands-5, sepia, black&white, B&W,

I like to use also these negative embedding: