---
title: Solidify
order: 4
---

Hollow a shape into a shell of given thickness — like Blender's Solidify modifier, but the result is a single watertight SDF you can keep stacking on.

![Solidify settings](../assets/modifier-settings-solidify.webp)

## Parameters

- **Thickness** — shell wall thickness (`0.001–10.0`, soft max `1.0`, default `0.1`)

## Use cases

- **3D-printable parts** that need to be hollow for filament savings
- **Light fixtures and shades**, where wall thickness is part of the design
- **Masks, cups, bowls**, anything closed-volume that should be a shell
- **Compound walls** — chain Solidify after a Boolean to hollow only the result

You can chain Solidify freely with booleans, mirrors, arrays, and twists — the shell stays a single watertight surface.

## See also

- [Boolean](boolean.md) — hollow the result of a boolean by adding Solidify after
- [Operations: Convert](../operations/convert.md) — convert the hollow shell to mesh