How to Create Images with AI: A Step-by-Step Guide for Beginners

How to Create Images with AI: A Step-by-Step Guide for Beginners

Last updated: September 30, 2026

Quick answer: To create an image with AI, you describe the picture you want in plain words (a prompt), pick a size, and press generate. A model such as GPT Image 2 or NanoBanana Pro returns a finished image in 10 to 60 seconds. Your first images are free: the free AI image generator gives 2 images a day with no account, and a new sparkpix account adds 5 credits. The tool matters less than the prompt, so most of this guide is about writing prompts that work.

What "creating images with AI" means

There are two different jobs, and knowing which one you are doing decides everything that follows.

Job	What you give the model	What you get back	Typical use
Text to image	A written description only	A brand-new image	Illustrations, concept art, social posts, product mockups
Image to image	A photo plus an instruction	The same photo, changed	Swap a background, change an outfit, restyle, fix a flaw

Every model on sparkpix does both from the same editor. Leave the upload empty and you are generating; add a photo and you are editing.

Step 1: Decide whether you are generating or editing

Generate from scratch when the picture does not exist yet and nothing about it is fixed. Edit when you already have a photo whose composition, face or product you need to keep.

Beginners often generate when they should edit. If you want "me on a beach", upload a photo of you and ask for the beach, rather than describing yourself from nothing. A generated person will not look like you; an edited photo will.

Step 2: Choose a model

All current models take the same kind of prompt. They differ in what they are good at, how fast they are, and what they cost. These are the ones you can use on sparkpix today:

Model	Made by	Strongest at	Cost on sparkpix
Free AI Image Generator	sparkpix	First tries and quick concepts, 2K output in about 3 seconds	Free, 2 images a day, no signup
GPT Image 2	OpenAI	Readable text inside the image, complex multi-part instructions, product and packaging shots	10 credits
GPT Image 2.5	OpenAI	Changing one named part of a photo and leaving the rest alone, transparent PNGs	10 credits
NanoBanana Pro	Google (Gemini 3 Pro Image)	Highest overall detail, up to 4K, the widest choice of aspect ratios	10 credits
NanoBanana 2	Google (Gemini 3.1 Flash)	Speed, many variations in a row	10 credits
Seedream 5.0 Lite	ByteDance	Cheap composition drafts, 4K output	5 credits
Grok Imagine	xAI (Aurora)	Photorealistic scenes, accurate logos and text	5 credits

A practical way to choose: draft with a 5-credit model or the free generator until the composition is right, then re-run the final prompt on GPT Image 2 or NanoBanana Pro for the finished version. If the image must contain words (a sign, a label, a headline), use GPT Image 2. It is the one that gets text right most of the time.

Step 3: Write the prompt

A prompt is a description, not a list of commands. The models read it the way a photographer reads a brief. A prompt that works has these parts, in roughly this order:

1. Subject. What the picture is of. "A golden retriever puppy" beats "a dog".
2. Action or pose. What the subject is doing: "sitting on a wooden dock, looking at the camera".
3. Setting. Where and when: "a mountain lake at sunrise, light mist over the water".
4. Medium and style. Photograph, oil painting, flat vector illustration, 3D render, watercolor. Name a medium every time; without one the model guesses.
5. Light. "Soft morning light", "overcast", "studio softbox", "neon at night". Light changes an image more than any other single word.
6. Camera and framing. "Close-up", "wide shot", "35mm lens", "shot from above", "shallow depth of field".

Put those together and you get a prompt like this:

A golden retriever puppy sitting on a wooden dock, looking at the camera, a mountain lake at sunrise with light mist over the water, photograph, soft warm morning light, 35mm lens, shallow depth of field.

That is 40 words. Most good prompts are 25 to 60 words. Longer prompts do not help; they add things the model has to trade off against each other.

Vague versus specific

Vague prompt	What you probably get	Specific rewrite
a nice logo for a coffee shop	A generic cup icon with random letters	Flat vector logo of a steaming coffee cup inside a circle, two colors, dark brown and cream, no text, white background
beautiful woman portrait	A stock-photo face with plastic skin	Candid portrait of a woman in her 40s laughing, freckles, natural skin texture, window light, 85mm lens, film photograph
product photo of headphones	Floating headphones with odd shadows	Black over-ear headphones on a light grey studio backdrop, three-quarter angle, soft shadow beneath, photograph, commercial lighting
fantasy landscape	Purple everything	Wide shot of a valley with terraced rice fields and a stone village, morning fog, matte painting style, muted greens and gold

Five prompt rules that save credits

• Describe what you want, not what you do not want. Current models handle "an empty street" far better than "a street with no people". Negative words are often ignored.
• One subject per prompt. Two people doing two things is where hands and faces start going wrong. Generate them separately and combine with an edit.
• Front-load the important part. Words near the start of the prompt carry more weight.
• Name the medium. "Photograph", "watercolor", "pixel art". It is the single most reliable way to control the look.
• Set the aspect ratio in the settings, not the prompt. Writing "vertical" in the prompt does not change the canvas. The setting does.

Ready-to-use prompts by task

• Social post background: Abstract gradient background, soft peach to lavender, subtle grain, no objects, no text, minimal.
• Product mockup: A matte white ceramic mug on a marble counter, morning light from the left, photograph, shallow depth of field, empty space on the right for text.
• Blog illustration: Flat illustration of a person watering a small plant at a desk, pastel palette, clean lines, white background.
• Poster with text (use GPT Image 2): Concert poster, bold sans-serif headline reading SUMMER NIGHTS, sunset colors, palm silhouettes, 1970s screen-print style.
• Profile picture: Close-up portrait of a man in his 30s with a short beard, neutral grey background, soft studio light, photograph, looking slightly off camera.
• Concept art: A lighthouse on a cliff during a storm, waves crashing, dramatic clouds, digital painting, cinematic wide shot.

Step 4: Set the size and resolution

Two settings decide whether the image fits where it is going.

Aspect ratio is the shape. Pick it before you generate, because cropping afterwards loses part of the picture:

Ratio	Where it fits
1:1	Profile pictures, Instagram grid, product thumbnails
4:5	Instagram feed posts
9:16	Stories, Reels, TikTok, phone wallpapers
16:9	YouTube thumbnails, blog covers, presentations
3:2	Standard photo prints (4x6, 8x12)
21:9	Website hero banners

NanoBanana Pro offers all of these; the other models cover the common ones.

Resolution is the pixel count. 1K is enough for a draft, 2K for anything on a screen, and 4K for print. At 300 DPI, a 4K image (about 4,000 pixels on the long side) prints roughly 13 inches wide, so a 2K image is fine for a phone screen but not for a poster. If you generated at a lower size and need it bigger, the photo upscaler enlarges it afterwards.

Choose PNG output when you need a transparent background or a logo; JPG is smaller for photos.

Step 5: Generate, then change one thing at a time

The first result is a draft, not a verdict. The mistake beginners make is rewriting the whole prompt after each try, which makes it impossible to tell what caused the change. Instead:

1. Keep the prompt and change only the light ("soft morning light" to "overcast, flat light"). Compare.
2. Keep the winner and change only the framing ("close-up" to "wide shot").
3. Keep that and change only the medium if the look is still wrong.

Once the composition is right, stop generating from scratch. Switch to image to image: upload the best result and ask for the small changes ("make the mug blue", "add a window on the left"). An edit keeps everything you liked; a fresh generation gambles all of it again.

Step 6: Fix the usual flaws

Some problems come up in almost every first session. Each has a specific fix:

• Hands with six fingers, warped faces. Ask for a simpler pose ("hands in pockets", "holding a cup") or a tighter crop that leaves hands out. For faces, edit a real photo instead of generating a person.
• Garbled text. Only GPT Image 2 renders text reliably. Keep the wording short, put it in capitals, and say exactly where it goes ("headline at the top").
• The plastic, over-smooth AI look. Add "natural skin texture, film grain, candid" to the prompt, or run the result through the AI image humanizer, which is built to remove that look without changing the person.
• The model changed something you wanted kept. Say what to keep, not only what to change: "keep the face, pose and clothing exactly the same; only replace the background". GPT Image 2.5 is the most obedient here.
• Blurry or too small. Regenerate at 2K or 4K, or upscale the result.
• Not what you asked for at all. The prompt contradicts itself somewhere ("minimal" and "detailed", "photograph" and "cartoon"). Remove one side.

Step 7: Download and use the image

Download the full-size file, not the preview. On sparkpix your results stay in your account; the photos you upload for editing are deleted within 3 days.

On rights: the model providers sparkpix uses (OpenAI, Google, ByteDance, xAI) let you use the images you generate, including commercially, under their current terms. Three things still apply to you rather than the tool: do not generate a real person's likeness without their permission, do not reproduce a brand's logo as your own, and do not present an AI image as a real photograph where that would mislead someone.

What it costs

• Free: 2 images a day on the free generator, no account needed. A new account adds 5 credits, enough for one image on any 5-credit model.
• Credit packs: $9.99 for 350 credits (35 images on a 10-credit model or 70 on a 5-credit one). Larger packs are $29.99 for 1,200 and $59.99 for 3,000, and a first purchase of either comes with 30% bonus credits.
• Subscription: $19.99 a month for 1,000 credits, the cheapest per image if you generate regularly.
• Credits do not expire, and a failed generation is refunded automatically.

Frequently asked questions

How do I create an image with AI for free?

Open the free AI image generator, type a description, choose a size and click generate. You get 2 images a day without creating an account and without a watermark. Creating a free account adds 5 credits for the other models.

What is the best AI image generator for beginners?

Start with the free generator to learn prompting, because mistakes cost nothing. When you need text in the image, use GPT Image 2. When you need the most detail or an unusual aspect ratio, use NanoBanana Pro. All of them accept the same prompts, so what you learn on one carries over.

How long should an AI image prompt be?

Between 25 and 60 words. Cover the subject, the setting, the medium, the light and the framing, then stop. Very long prompts do not add control; they add competing instructions the model has to trade off.

Why do AI images get hands and text wrong?

Hands have many possible poses and few pixels, so models still confuse them. Text is a sequence of exact shapes, which most image models draw approximately. Ask for simpler poses or tighter crops, and use GPT Image 2 for any image that must contain readable words.

Can I use AI-generated images commercially?

Yes. Under the terms of the model providers sparkpix uses, you can use what you generate commercially. You remain responsible for not using a real person's likeness without consent and not reproducing trademarks.

How do I make an AI image look like a real photo?

Ask for a photograph explicitly, name a lens and a light source, and add "natural skin texture" for people. If the result still looks smooth and artificial, run it through the AI image humanizer, which restores texture and natural light without changing the subject.

Ready to try it? Generate your first image free, or open GPT Image 2 if the image needs to contain text.