# A two-story house from one sketch, start to render

> An architect's full 3D-Agent session in Blender: massing, wooden louvers, materials and a client-ready render in one afternoon.

By Guilherme Lima · 2026-10-18 · https://3d-agent.com/blog/two-story-house-from-sketch

This is a sample post. It shows how a case study renders on the blog.

## Where did the session start?

With a phone photo of a pencil sketch and one prompt.

```prompt Massing
Build a two-story house from the sketch in the reference image. Ground floor {{12}} m wide, upper floor cantilevered {{2}} m over the entrance.
```

## What took the longest?

The louvers. Getting their spacing right took three passes, each one a short follow-up prompt.