Paint.NET TEX Plugin

Load and save League of Legends .tex texture files in Paint.NET 5.1+

Features

• Load DXT1, DXT5, and BGRA8 texture formats.
• Auto detect the compression, mipmaps and saves acordingly.
• Second saving option with a menu to manually pick the compression, error diffusion dithering and mipmap generation.
• Fast DXT compression/decompression using native C#.
• Great error diffusion dithering quality.
• Full alpha channel support.

Requirements

• Paint.NET 5.1 or later (.NET 9)
• .NET 9.0 SDK (for building)
• Windows 10 or later

Installation

1. Close Paint.NET
2. Open C:\Program Files\Paint.NET\FileTypes
3. Paste TexFileType.dll from the releases into this folder
4. Start Paint.NET

• Portable version note! In order to install the plugin on the portable version of Paint.NET please paste the dll file into [Paint.NET folder]\FileTypes

Usage

Opening TEX Files

• File → Open → Select your .tex file
• Drag and drop .tex files into Paint.NET

Saving TEX Files

1. File → Save As
2. Choose "League of Legends TEX" from the file type dropdown

Saving TEX Files with customizable settings

1. File → Save As
2. Choose League of Legends TEX (with options) from the file type dropdown

Troubleshooting

Paint.NET crashes or the file doesn't load

• Make sure you're running the 5.1.11 (latest) version of Paint.NET

Plugin doesn't appear in Paint.NET:

• Make sure Paint.NET is completely closed
• Check the FileTypes folder exists: C:\Program Files\Paint.NET
• Verify TexFileType.dll is in the FileTypes folder

"There was an error while saving the file." error when saving:

• Make sure that the dimensions of the file are divisible by 4. This is a requirement for it to work in League.

Credits

Uses LtMAO's tex reading logic. Thanks to Tarngaina.

• GitHub: https://github.com/tarngaina/LtMAO

Compression and Error Diffusion Dithering Logic

• BC1/BC3 compression with Floyd-Steinberg dithering is based on Microsoft DirectXTex (MIT License).