DALL·E 2 - Powerful for “Inpainting”, “Outpainting”.
Stable Diffusion - Powerful for
“Image-to-image”. Your input is (1) an image + (2) a prompt, the output is an image.
“Prompt-to-image”.
If you have your own Discord server, you may invide the MidJourney bot by ”/imagine” from there too, so that you get your images there

.
Prompt design #1: “photo, close-up portrait, 30-year-old male teacher, short blonde hair, beart, friendly, by Annie Leibovitz, dark background, studio lighting, sepia color, 8k epic detailed photograph shot on kodak”.
Content type - “photo”.
Perspective - “close-up portrait”.
Motif description - “30-year-old male teacher, short blonde hair, beart, friendly”.
Style - “by Annie Leibovitz”.
Light - “dark background, studio lighting”.
Color - “sepia color”.
AddOns - “8k epic detailed photograph shot on kodak”.
Prompt design strategy:
STEP1: The motive description might be the “flexible” part of the prompt = the only not “inflexible” part of the prompt, if you want to develop a prompt of photos with different contents - males, females, hair color,.. -, but with same style ).
In another step, after the subject of the photo is right, you might set another part of the prompt as “flexible”, i.e. the light.
Prompt design #2: “Zoom background”: “a photo of a room filled with books, simpson's furniture, white floor, penthouse, large windows, paris, digital lavender, wide-angle shot, bright natural, by Tadeo Ando, design award winner, highly-detailed, 8k”.
Content type - “photo”.
Perspective - ” wide-angle shot”.
Motif description - “room filled with books, simpson's furniture, white floor, penthouse, large windows, Paris”.
Style - “by Tadeo Ando, design award winner”.
Light - “bright natural”.
Color - “digital lavender”.
AddOns - “highly-detailed, 8k”.
Midjourney parameter - ”–ar 16:9”.
Prompt design #3: “Abstract background” for marketing materials, website, social media, LinkedIn banner, ads, packaging: “abstract background, by Yaacov Agam, electric blue color”, “abstract background, by Monet, electric blue color”.
Content type - “abstract background”.
Style - “by Yaacov Agam” or “Monet”.
Color - “electric blue color”.
With abstract images, also short prompts might work properly!
Prompt design #4 with “Midjourney”: “gangsta dog”.
The secret of good and spectacular prompts: Use artist names “by XXX” in the prompt!
Advanced topics:
Parameters - To manipulate quality, consistence, aspect ratio.
Image prompting - Give AI an image as inspiration.
Blend mode - Mix up to 5 images together.
Inpainging - Modify an image by prompt.
Outpainting - Extend an image by prompt.
Additional tools - ChatGPT, color palettes, upscale tools, image-to-prompt, face correction tools.