# Interior lighting in Blender: the prompts that fix flat renders

> Area lights, portals and exposure in Blender, explained as the five asks to 3D-Agent that change an interior render the most.

By Guilherme Lima · 2026-10-09 · https://3d-agent.com/blog/interior-lighting-blender-prompts

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

## Why do interior renders look flat?

Most of the light comes from one direction and nothing bounces.

```prompt Window light
Add a light portal to every window and set exposure so the brightest wall sits at about {{80}}% white.
```