What kind of sketches work best?

Any hand-drawn sketch with reasonably clear lines works — pencil, ink, marker, or a digital line drawing on iPad/Procreate. Both architecture exteriors and interior layouts are supported and auto-detected. Cleaner outlines and clear window/door openings give the best results.

How long does a render take?

Fast renders complete in about 15 seconds and Premium photoreal renders take around 30–45 seconds. You can keep iterating with variations — each one preserves the geometry but changes lighting, time of day or material palette.

Do I need a credit card to try it?

No. Plans start at $9.99 (Silver — 50 AI Credits / 15 days). 1 credit per render. Switch plans anytime.

How much does each render cost?

Fast renders cost 5 points each and Premium photoreal renders cost 10 points each. Variations of an existing render cost the same as a new render of the same tier.

Can I use the renders for client presentations?

Yes. Premium renders are DSLR-quality and explicitly built for client-ready presentations, competition boards and Instagram. You own the outputs and can use them commercially in your portfolio, social posts and proposals.

Will the AI change my design?

No. The model is instructed to preserve building massing, window/door positions, roof shape and overall geometry. It only adds materials, lighting, sky, vegetation and atmosphere — it doesn't redesign your concept.

Can I render interiors too?

Yes. The auto-detect routes interior sketches through a dedicated interior pipeline tuned for furniture, room geometry and global illumination — so a living-room sketch becomes a magazine-style interior photo.

What image formats are supported?

JPG, PNG and WebP up to about 10 MB. Photos of paper sketches taken with your phone work — just make sure the sketch fills most of the frame and isn't blurry.

Can I download high-resolution images?

Yes. Every render is saved to your project gallery and can be downloaded at full resolution. Premium renders are produced at the highest resolution the model supports.

AI Cadbull Studio

All tools

Sketch

3D render

← Drag the slider to reveal the AI-generated render

Turn hand sketches into photoreal 3D renders.

Upload any pencil, ink or marker sketch — building exterior or interior — and our AI delivers a 100% photorealistic 3D image in under a minute.

AI tools included every AI tool included. Commercial use

~30s

avg render

4.8★

327 ratings

100%

photoreal

Works with

Pencil sketchesInk & markeriPad / ProcreateCAD line drawings

The workflow

From paper to photoreal

Three steps. Under a minute. No 3D software needed.

Upload sketch

Drop a hand-drawn or digital sketch — pencil, ink, marker, iPad or CAD outlines. Building or room — auto-detected.

AI renders

Our model preserves your geometry exactly and adds PBR materials, realistic lighting, sky, shadows and atmosphere.

Compare & download

Drag the before/after slider, generate variations for different moods, and download full-resolution images for clients.

Cadbull AI

Avg render

~30 sec

Variations

Unlimited

Quality

DSLR-grade

Built for real workflows

Architects, interior designers and students use sketch-to-3D every day.

Concept presentations

Turn napkin sketches into client-ready visuals in the same meeting. Win the brief on day one instead of week two.

Interior moodboards

Sketch a room layout and instantly see it in 4 different material palettes — wood, stone, minimal, biophilic.

Competition boards

Photoreal hero images at DSLR quality without spending nights in V-Ray. Submit more entries, win more juries.

Material exploration

Generate variations to test material, lighting and time-of-day options before committing to a direction.

Site context renders

Drop your design into a believable environment with sky, landscape and subtle vegetation — automatically.

Student portfolios

Architecture students: build a portfolio of photoreal hero images for thesis, juries and job applications.

Tips for the best renders

Small sketch habits, dramatically better outputs.

Draw clear outlines

Bold, continuous lines beat soft shading. The model reads outlines best — fill light shading later.

Mark openings clearly

Show windows and doors as distinct rectangles. Clear openings = correct façade and correct interior light.

Photograph straight on

If you're shooting paper, hold the camera flat to the page. Avoid heavy shadows from your hand or lamp.

Use the variation button

Same sketch, different mood — generate variations to explore time-of-day and material palettes risk-free.

By the numbers

Loved by creators worldwide

12k+

Architects & students

180k+

Renders generated

4.8/5

Average rating

30s

Avg time to render

Loved by architects & students

4.8 / 5 from 327 reviews

"I sketched a façade in the cab on the way to a client meeting and walked in with a photoreal render. Closed the project that afternoon."

Aarav S.

Principal Architect, Mumbai

"Replaced my V-Ray draft pass entirely for early-stage client presentations. 30 seconds vs 3 hours."

Neha K.

Interior Designer, Bengaluru

"As a final-year student I built my entire thesis portfolio with sketch-to-3D. Got into two grad schools."

Rohan M.

Architecture Student, SPA Delhi

Simple, fair pricing

Pay per render — no subscriptions, no surprises.

Fast

5 pts / render

~15 second render time
Great for iterations & concepts
Auto building / interior detect
Unlimited variations

Premium

10 pts / render

~30–45 seconds, top-tier model
100% photoreal — DSLR look
Best for client presentations
Full-resolution downloads

Refund on failed renders Credits never expire Commercial use included

Sketch-to-3D vs traditional rendering

Why early-stage visualization belongs to AI.

Stage

Traditional (V-Ray / Lumion)

Sketch-to-3D

Time to first render

3–8 hours

~30 seconds

Software needed

SketchUp + V-Ray + plugins

Just a browser

Skill required

Mid-senior 3D artist

Anyone who can sketch

Cost per render

$50–$300 outsourced

5–10 credits

Iterations

Slow, costly

Unlimited variations

Time to first render

Traditional

3–8 hours

Sketch-to-3D

~30 seconds

Software needed

Traditional

SketchUp + V-Ray + plugins

Sketch-to-3D

Just a browser

Skill required

Traditional

Mid-senior 3D artist

Sketch-to-3D

Anyone who can sketch

Cost per render

Traditional

$50–$300 outsourced

Sketch-to-3D

5–10 credits

Iterations

Traditional

Slow, costly

Sketch-to-3D

Unlimited variations

FAQ

Frequently asked questions

Everything you need to know before you upload your first sketch.

Explore the rest of the studio

More AI tools built for architects and interior designers.

Architecture Visualizer

Photo or DWG → exterior renders, multi-angle.

Interior Visualizer

Restyle a room in 4 design moods.

2D → 3D Visualizer

Floor plans & elevations cleaned and visualized.

Ready to render your first sketch?

Plans from $9.99 unlock every AI tool — your next concept is one upload away.