WhimTex

Create textures, sprites and VFX masks right in Unity — without an external graphics editor.

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Installation · Why WhimTex · Quick start · Shortcuts · Changelog · Report an issue

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WhimTex is a free, open-source Unity sprite editor and texture editor. It handles the small tasks that would otherwise send you to a graphics editor: touching up a texture, painting a particle mask, generating noise for VFX or combining layers into a sprite.

The editable composition and ready-to-use texture live in one asset. Layers, effects and transforms stay editable, while the asset can be assigned directly to a material. Export only when you need a separate image file.

Why WhimTex

• Stay in Unity. Paint and check the result without moving files between editors.
• Keep your work editable. Layers, gradients, noise, outlines and Shader FX remain adjustable rather than being permanently baked.
• Work with your project. The saved asset works as a texture, and its nested Output Sprite works as a sprite. Drag textures, brush presets and HLSL effects from Project, and store presets alongside your project.
• See it on the model. Live Update shows the result on scene objects while you paint.
• Use procedural tools where they fit. Create noise, gradients, shapes, distance fields and outlines with parameters rather than brush strokes.
• Work with AI. A connected agent adds and edits layers in the open document. A browser AI can describe layers, a brush or HLSL effects as JSON—paste it with Ctrl+V. An authoring guide, schemas and examples help generate valid results; paste errors appear in the Console.
• No runtime dependencies. WhimTex runs only in the editor; your game uses the finished textures and sprites.

What you can make

• VFX and particle textures: soft masks, gradients and procedural noise.
• Layered sprites and icons from imported images, painted pixels, fills, gradients and noise.
• Pixel art and seamless patterns with Brush, Pencil, selections and symmetry.
• Outlines, distance fields, normal maps, Gaussian/Motion Blur and custom Shader FX.
• Packed texture channels and HDR compositions, with optional game Post FX preview.

Note

Requires Unity 6 (6000.0) or newer.

Install

In Package Manager, choose Install package from git URL and paste:

https://github.com/DCFApixels/WhimTex.git

Installation details.

Make your first image

1. Open Window → WhimTex and set the canvas size. Click New for another document.
2. Click + at the bottom of Layers and choose Drawing Layer. Alternatively, drag an existing texture from Project onto the preview.
3. Arrange it with Transform (T), or paint with Brush (B) / Pencil (P).
4. Press Ctrl+S. The editable document and full-resolution texture are saved in one .asset.
5. Assign that asset to a texture field, or use its nested Output Sprite.

Double-click the saved asset to reopen it. PNG, TGA, JPEG, EXR, layered PSD and Texture2D are available through Export.

Documentation

Create layers and Shader FX with a browser AI → — generate editable procedural compositions as JSON, then paste into WhimTex. How to paste.

Read the documentation → · Русская версия · 简体中文

The guide follows the editing workflow, from the first canvas to painting, effects and export:

Next step	Guide
Learn the window and arrange sources	Getting started · Layers · Transform
Paint, fill and select	Painting · Selections · Seamless patterns
Build procedural textures	Noise · Effect layers · Normal Map
Control the composition	Blending and clipping · Shader FX · HDR and channels
Inspect and deliver	Preview · Post FX · Save and export
Find a control or solve a problem	Shortcuts · Troubleshooting
Automate authoring	Working with an agent

Acknowledgements

Thanks to the authors and maintainers of the libraries that help power WhimTex:

• Sobol direction numbers — Frances Kuo and Stephen Joe; evenly distributed brush variation. Included license.

• FastNoiseLite — Jordan Peck and contributors; the HLSL implementation powers the Noise layer. Included MIT license.

• Newtonsoft.Json — James Newton-King and contributors; JSON serialization for compositor documents and the agent API, provided through Unity's package. Included third-party licenses.

• Unity Burst and Unity Collections — optimized CPU processing and native collections.

• Just the Docs — the documentation theme. Included MIT license.

See Third-party notices for source versions and package license details. Third-party components retain their own licenses.

Community & license

Questions or ideas? Join Discord · RU / EN. For bugs, open a GitHub issue with your Unity version and reproduction steps.

Distributed under the MIT License.