Prompt Optimization: How to Write Prompts That Actually Work

You typed 'cool Roblox character' into an AI image generator and got back a generic character standing in empty space. Flat lighting, boring pose, no background worth looking at. The AI did exactly what you asked. The problem is you barely asked for anything.

Writing a good prompt isn't about writing more. It's about being concise and specific at the same time. You don't need a full essay. You need the right details packed into a few sentences. Vague prompts force the AI to guess, and it always guesses boring.

See the Difference

Same idea. Completely different output. The bad prompt gives the AI a character and a location. That's it. The good one packs in an action (grabbing items), an emotion (panicked), a lighting contrast (bright foreground, dark background), a mood (creepy), a style (cartoony), and a composition (centered, square). All in three sentences. That's what concise and specific looks like.

The Six Things That Matter

You don't need to memorize a formula. Just make sure your prompt touches these six things and you'll beat 90% of what other people are generating.

• 1. Action and emotion — don't just place a character somewhere. Give them something to do and a way to feel
• Instead of 'holding a sword,' try 'swinging a glowing sword mid-jump with a determined expression'
• 2. Camera angle — low-angle feels powerful, close-up creates intensity, bird's eye gives scale
• Instead of 'a character falling,' try 'dramatic low-angle shot of a character mid-air, arms out'
• 3. Specific colors — name actual colors and say where they show up in the scene
• Instead of 'colorful background,' try 'bright cyan and white light bursting through cracks'
• 4. Lighting — this is what separates flat images from professional ones
• Instead of 'good lighting,' try 'cinematic lighting, glowing rim light, volumetric dust floating in the air'
• 5. Background — describe it like it matters, because it does
• Instead of 'dark background,' try 'dark stormy sky with faint neon-lit clouds, a deep void below with a soft blue glow'
• 6. Quality and exclusions — end with keywords that push quality up and keep out stuff you don't want
• Instead of nothing, try 'high contrast, bold composition, no text, no logo'

Try It With RoVisuals

RoVisuals enhances your prompts with game-specific optimizations automatically. But the better your input, the better the output. Write a tight, specific prompt like the example above and you'll be generating icons that look like they came from a top-charting game. Try it free and see the difference a good prompt makes.