From sketch to render — in seconds.
The Brutalist turns a hand sketch into a photorealistic render, for a faster and more precise concept design stage.
10 free renders · no card needed · runs in the browser
The whole loop, for real.
A real session, recorded in the app: drop in a sketch, hit Generate, get a photorealistic render in full 2K. Sixteen seconds, uncut speed-up.
Your lines are never redrawn.
The drawing is the base — the AI follows your sketch, it never invents a different building.




How it works
Start your sketch
Import a photo of a paper sketch, paste a 3D model view from SketchUp or Rhino, or draw the massing with the pen.

Generate
Tap Generate — a photorealistic render appears in about 20 seconds, in the same proportion as your sketch.

Iterate
Adjust the drawing and generate again until the massing and viewpoint are right.

Annotate if it misreadsoptional
If the AI doesn’t follow your drawing, add a note in blue — write it by hand or type it. It reads the instruction but doesn’t draw it.

Reinforce the geometry
Firm, clear lines keep it faithful — the sketch is always the master. Strengthen the shape and angle by drawing the lines you want.

Pin a direction
Once the geometry and angle are right, tap the pin to hold that look and generate similar takes.

Refine with the lasso
Happy with it? Circle an area with the lasso and write the change in red — by hand or typed — a new finish, an object, a detail. Only that part updates; the rest stays exactly as it was.

Or change the whole scene
Write a red “#” note on its own — no loop — to restyle the whole image: time of day, weather, material, mood (e.g. #sunny day, #night).

Download your render
The whole image updates to match your note. When it’s the one, download it — in 2K.

Your tools
- Pen
- Black lines — the building. Tap it again to set thickness.
- Blue pen
- Notes on the sketch — write by hand or type them; read, never drawn. They steer the geometry. A “#” note sets the scene; “#interior” / “#isometric” changes the view.
- Type
- Prefer the keyboard? Tap the T, then type your note instead of writing it — handy on desktop, or when handwriting is hard to read. It lands in the tool’s colour: blue on the sketch, red on the render.
- Eraser
- Removes pen and blue strokes. Erases at twice the pen width.
- Generate
- Render the sketch — about 20 seconds, in the same proportion as your drawing.
- Edit the render
- Refine finishes — circle an area on the render and write the change in red, by hand or typed (material, colour, people, weather). Only that part updates; a “#” alone restyles the whole scene.
- Pin
- Hold the look and keep generating — close variations, never the same image, until it’s the one.
- Download
- Save the render to your device, upscaled to 2K.
- Swap
- Flip the sketch and render panels left/right.
- Import
- Load a photo of a paper sketch (its text won’t show), an image file, or paste a screenshot straight from your clipboard — even a 3D model view from SketchUp, Rhino or Revit.
Get faithful results
Cleaner lines, closer render
Loose scribbles leave room for the AI to improvise. Firm, deliberate lines keep it faithful.
Draw the viewpoint you want
It obeys the perspective and camera angle in your sketch — so set the view by how you draw it.
Thick lines are walls; empty stays empty
Bare areas render as plain concrete or ground. Nothing is invented where you didn’t draw it.
People & nature only if you draw them
Figures and trees render as real, living things — but only when they appear in the sketch.
Notes are direction, not drawing
Blue on the sketch, red on the render — the AI applies your notes but never draws them. A “#” sets the whole scene; arrows and words target a spot.
It’s a massing study
Fast concept exploration — not a line-for-line trace or a final visualization.
A fast concept tool — not a final visualization. Explore massing and ideas instantly, then take the direction into your full pipeline.
Your work stays yours
Your sketches and renders are never stored on our servers. They live only in your session — discard a render or close the app and it’s gone for good. The only copy that exists is the one you choose to download to your own device.