---
title: "SubTerrain Tool - s&box library"
description: "Bigger terrain brushes, slope & path sculpting, height setting, and square brush masks for the making cooler terrains!"
canonical: "https://sbox.watch/libraries/subzerostudios/subterrain-tool/"
generated_at: "2026-06-30T09:16:04.509Z"
---

# SubTerrain Tool

Bigger terrain brushes, slope & path sculpting, height setting, and square brush masks for the making cooler terrains!

- Type: library
- Ident: subzerostudios.subterrain-tool
- Creator: SubZero Studios
- Canonical: https://sbox.watch/libraries/subzerostudios/subterrain-tool/
- Markdown: https://sbox.watch/libraries/subzerostudios/subterrain-tool.md
- sbox.game: https://sbox.game/subzerostudios/subterrain-tool/
- Generated: 2026-06-30T09:16:04.509Z

## Stats

- 24h momentum: +0
- Terry score: 27%
- Favorites: 1
- Upvotes: 1
- Downvotes: 0
- Updated: Jun 30, 2026
- Created: Jun 30, 2026
- Size: 84.5 KB
- Files: 21
- Tags: path, slope, subzero, terrain, tool, workflow

## Description

SubTerrain Tool
What it does
Sculpt Tools
- Raise / Lower — paint height up or down. Hold Ctrl to invert.
- Smooth — blend neighboring heights for softer terrain.
- Flatten — level to the height under the cursor (locks to a plane while dragging).
- Slope — click start, drag to end; grades from start height to end height along the line.
- Path — click start, drag direction; keeps a constant elevation strip (road/trench style).
- Set Height — flatten to an absolute world height from brush settings.
- Noise — add procedural variation. Hold Ctrl to invert.
- Hole — remove surface and collision in the brush area (per-texel punch-through, not enclosed volumes).

Brush & preview
- Large brushes — size up to 32,000 units
- Brush preview on the terrain surface, matching the built-in terrain tool.
- Square masks included (hard, soft, rounded, outline); also uses the shared engine brush list.
- Undo/redo on height and control-map edits.

Status
- Live cursor readout: world Z, normalized height, brush texel footprint, and brush world span.
- Shows — when the cursor is not over terrain.

How to use it
- Add the library.
- Open a scene with a Terrain component and select it.
- Activate SubTerrain from the scene tools.
- Pick a sub-tool from the toolbar or press 1–9.
- Choose a brush mask and adjust Size / Opacity in the sidebar.
- Left-click and drag on the terrain to sculpt or paint. Hold Ctrl on supported modes to invert.

Keyboard shortcuts

| Key | Tool |
|-----|------|
| 1 | Raise / Lower |
| 2 | Smooth |
| 3 | Flatten |
| 4 | Paint Texture |
| 5 | Slope |
| 6 | Path |
| 7 | Set Height |
| 8 | Noise |
| 9 | Hole |

Credits
Made by the SubZero Studios team.



## More by SubZero Studios

| Package | Ident | Players | Favorites | Upvotes | Score | Markdown |
| --- | --- | --- | --- | --- | --- | --- |
| Supershot | subzerostudios.supershot | 0 | 7 | 8 | 75% | https://sbox.watch/libraries/subzerostudios/supershot.md |