RoomLab.app
Custom Prompt

Edit Any Room Photo with a Custom AI Prompt

If you can describe it, you can visualize it. Use natural language to add specific lifestyle elements, holiday decorations, or custom branding to your real estate photography.

One-time plans from $15

or
See pricing
Input Input
AI Generated AI Generated

Custom Prompt — Design Anything You Can Describe

Preset styles have limits. Describe exactly what you want in plain text, add reference images for precision, and generate designs that match your client's unique vision.

Learn how in the tutorial →

Preset styles don't capture your client's unique vision — describe exactly what you need.

Ideas stuck in your head don't sell. Visualize any concept on demand.

Stop settling for generic AI output. Add reference images for precise control.

Perfect For

Interior Designers Real Estate Professionals

Used by property and design teams around the world

Sowerbys Heritage Real Estate
Moonstudio Interiors
Custom Prompt

Add Your Logo or House Number to Exterior Photos

Digitally insert a custom real estate logo or house number onto a signpost, ensuring perfectly matched perspective and lighting.

Input Input
AI Generated AI Generated
Custom Prompt

Add Christmas Decorations to Your Room Photos

Add a holiday atmosphere to a standard living room photo by generating a Christmas tree, presents, and a family gathering to drive seasonal engagement.

Input Input
AI Generated AI Generated
Custom Prompt

Add a Person Gaming to Your Setup Photo

Add a person actively gaming to a fully set up gaming room scene with AI-generated photorealistic detail and natural lighting effects.

Input Input
AI Generated AI Generated
Custom Prompt

Add a Dog or Cat to Your Living Room Photo

Make a room feel lived-in and cozy by adding pets like a dog sleeping on the sofa and a cat on the windowsill.

Input Input
AI Generated AI Generated
View All Custom Prompt Examples

Custom Prompt Editing — Frequently Asked Questions

Can I edit a room photo just by describing what I want?

Yes. Upload the photo and type the change in plain words — 'add a fireplace under the TV', 'make it feel like a cozy autumn evening', 'replace the curtains with linen ones'. You can write in your own language; the AI understands and applies it to your actual room.

What kind of changes can I ask for?

Anything the preset modes don't cover: adding or removing specific objects, changing lighting and mood, seasonal decoration, combining several changes at once, or unusual client requests. If you can describe it, you can generate it.

Can I add a reference image to my prompt?

Yes — attach a reference photo alongside your text prompt when you want a specific item or look. The AI uses the reference for accuracy and your text for instructions.

How do I write a good prompt?

Be specific about what should change and what should stay. 'Change the sofa to a green velvet one, keep everything else the same' works better than 'make it nicer'. Short, concrete instructions produce the most predictable results.

Is it free to try?

Yes — every new RoomLab.app account includes a free image generation, no credit card required.

Explore More Features

Discover what else you can achieve with RoomLab.app

Replace Furniture & Materials

Replace Furniture

Swap furniture pieces in photos to visualize options before purchase.
Replace Furniture & Materials

Replace Materials

Swap flooring, countertops, walls, and other surfaces to compare options.
Wall Colors

Paint Color Visualizer

Preview any wall paint color on any room — pick your own or use our curated presets.
Virtual Staging

Virtual Staging

Add furniture and decor to empty rooms for listing-ready property photos.
Declutter

Declutter Rooms

Remove mess and personal items while keeping the furniture intact.
Remove Furniture

Remove Furniture

Empty any room photo to show the bare space and its potential.
Change Style

Change Style

Restyle existing rooms while preserving layout and structure.
Architectural Render

3D to Photorealistic

Convert 3D models and renders into stunning photorealistic images.
Video

Video Generation

Create walkthroughs, before-and-after transitions and multi-room house tours from property photos, or edit a clip you filmed.
Photo Enhancement

Photo Enhancement

Blue skies, green grass, clean pools — one-click fixes for listing photos.

Pay only for the images you want to generate

All users get all features.

1 free image Secure checkout Cancel anytime
Upscale to 4K Replace materials Replace furniture Wall colors Render interiors Render exteriors Redesign entire rooms Custom prompts Virtual staging Video generation Empty a room Declutter rooms 3D model to photo Swap with reference image Quick outdoor fixes

Personal

One-time purchase, no subscription

$15 once

15 images or 3 videos

150 credits, paid once

  • Every tool except House Tour
  • Download your designs without a watermark

One-time payment · no subscription

Pro

For personal projects

$20 /mo $200 /year

$16.67/mo · billed yearly

40 images or 8 videos

400 credits every month 400 credits added every month

  • Every tool, including House Tour
  • Refill packs if you run low

Renews monthly until cancelled Renews yearly until cancelled

Most Popular

Ultra

Best for professionals

$49 /mo $490 /year

$40.83/mo · billed yearly

110 images or 22 videos

1,100 credits every month 1,100 credits added every month

  • Every tool, including House Tour
  • Refill packs if you run low

Renews monthly until cancelled Renews yearly until cancelled

Premium

For agencies and power users

$99 /mo $990 /year

$82.50/mo · billed yearly

300 images or 60 videos

3,000 credits every month 3,000 credits added every month

  • Every tool, including House Tour
  • Designs kept for 3 months

Renews monthly until cancelled Renews yearly until cancelled

Have any question?

How much does each generation cost?
Each image generation uses ~10 credits, and 4K output adds +10 credits.
How long does it take to generate an image?
An image generation takes around 25 seconds. Adding 4K output adds approximately 5 seconds.
What happens if I run out of credits mid-month?
You can always purchase a credit refill pack anytime during the month if you need more credits before your next billing cycle.
What are credits?
Credits power every generation. Image generation uses ~10 credits, and 4K adds +10 credits.
Do credits expire?
Credits don't expire while your subscription is active: unused credits roll over to the next month. Yearly subscribers receive credits monthly, not all at once. If your subscription ends, your remaining subscription credits are saved and unlock again when you resubscribe. Credits from the Personal plan and refill packs never expire. Anyone who paid before this policy took effect is permanently exempt, including one-time buyers and former subscribers. Their current and future credits remain usable after a subscription ends.
Can I upgrade my plan?
Yes, anytime: open Plan & credits and choose Change plan. You pay only the prorated price difference for the rest of your billing period, and we add the difference in monthly credits right away (Pro to Ultra adds 700). Your remaining credits stay, and from your next renewal you get the new plan's full monthly credits.
How long are my images stored?
Generated images and history are automatically deleted 1 month after creation (Pro/Ultra) or 3 months (Premium). Unused input images are also deleted after the same period of inactivity. Download your images before they expire!
Can I get a refund?
No, we cannot offer refunds because generation costs are already incurred on our end when you use the service.
Can I get a receipt or invoice?
Yes! After each payment, you receive an email confirmation. From that email, you can request a detailed invoice for your records.
What are input photos?
Input photos are the images you upload to transform. For best results, use well-lit photos taken straight-on and aligned with the room. We continuously update our models to ensure the best performance.
What happens to my personal photos?
Your photos are securely stored in our database and remain completely private. We do not share or use your photos for any purpose other than generating your designs.
What happens if I cancel my subscription?
You keep full access and can use your credits until the end of the period you paid for. After that, your remaining subscription credits are saved and unlock again as soon as you resubscribe. Credits from the Personal plan and refill packs stay usable. Anyone who paid before this policy took effect is permanently exempt, including one-time buyers and former subscribers. Their current and future credits remain usable after a subscription ends.

Professional Results. Fraction of the Cost.

Get photorealistic interior renders in seconds, not days. Professional-grade AI visualization with full creative control — no design skills needed.

One free image, no credit card required