The biggest news for Blender users: UnwrellaConnect, a free MIT-licensed plugin, now embeds Packer‑IO directly into Blender 4.2 and above. This replaces the older UV‑Packer add-on and offers tighter, more intuitive pipeline integration, including access to the commercial Unwrella‑IO unwrapping tool. UnwrellaConnect (GitHub) is distributed as a ZIP archive and brings Packer‑IO’s UI directly into Blender’s UV Editor—no need to jump between external applications. The UnwrellaConnect workflow is simple: install both the Packer‑IO standalone app and the Blender ZIP extension, then pack UVs directly from inside Blender. The plugin’s interface is minimal and matches Blender’s default UI style, designed for focus and speed.

Free, Not Basic.

Since its release in May 2024, Packer‑IO has positioned itself as a free, production-ready UV packing solution for VFX, game, and 3D visualization professionals. Its engine, developed over more than a decade, is designed to chew through thousands of UV islands and millions of polygons with ease. What sets it apart is the consistent packing time—no matter the texture resolution or polygon count. The multithreaded backend uses all available CPU cores for maximal throughput, and its multipacking capability means users can pack several models into a single or multiple texture sheets in one go.

Packer‑IO’s exact padding calculation prevents baking overlaps and maintains even spacing between UV charts. Supported formats include FBX, OBJ, GLTF, PLY, STL, among others, making it a practical bridge between different 3D content creation tools.

Texel Density and Real‑World Units

The update to version 1.2 in June 2025 added support for real-world scene units—metric and imperial—plus direct control over texel density. Users can now set precise pixels-per-centimeter or pixels-per-inch targets to ensure all their assets maintain consistent texture resolution, a feature particularly valued in game development and real-time pipelines.

Intelligent Hole‑Filling

With version 1.3, released July 2025, Packer‑IO’s packing logic takes a further leap. The new algorithm intelligently fills gaps between larger UV islands with smaller ones, reducing wasted texture space and maximizing texture efficiency. The improved hole-filling routine is essential for anyone needing the tightest possible UV layouts.

UI, Platform Support, and Licensing

Packer‑IO’s UI follows Design‑Thinking principles for clarity, reducing visual noise and hiding non-essential settings while still providing wireframe, edge, and fill display modes for visual feedback. The app is available for Windows 10+ and macOS 10.15+ and is fully free for personal, commercial, and educational use. Both Packer‑IO and UnwrellaConnect are MIT-licensed, so there are no restrictions or costs for commercial deployment.

Built for Pipeline Artists, Not Buzzword Collectors

Packer‑IO is aimed at real-world artists who need UV packing to be reliable, predictable, and efficient, not “revolutionary.” With its long engine lineage, scale- and texel-aware packing, multipacking, and robust hole-filling, it fills a practical gap for production pipelines. The direct Blender integration with UnwrellaConnect streamlines workflows and eliminates tedious import/export routines.

Of course, as with any “new” tool, artists should validate stability and performance in their own production environments before making permanent changes to their pipeline. Features look solid on paper, but only real jobs can confirm if Packer‑IO is ready for daily production.

Packer IO Release Notes

By the way: Packer Io is based on this previous Product for 3ds Max, which is now discontinued, but still available for Legacy Pipelines…

UV-Packer 3 | 3d-io

The post Packer‑IO with Blender integration! first appeared on DIGITAL PRODUCTION and was written by Bela Beier.

3d-io has unveiled Unwrella-IO, a standalone application designed to revolutionize the tedious process of manual UV unwrapping. This intuitive tool caters to 3D artists, designers, and game developers, providing automated UV map generation with minimal setup.

Specialized Unwrapping Modes

Unwrella-IO boasts three distinct unwrapping modes to accommodate various 3D geometries:

• Hard Surface Mode: Tailored for architectural structures, mechanical models, armor, and buildings, this mode ensures clean and efficient UV layouts.
• Organic Mode: Ideal for characters, creatures, and smooth surfaces, it generates seamless UVs with minimal effort.
• Mosaic Mode: Perfect for photogrammetry scans and high-poly, irregular models, this mode effortlessly processes complex triangulated geometry.

Optimized UV Packing

Leveraging UV-Packer technology, Unwrella-IO delivers high-performance UV compression, automatically maximizing available UV space while preserving texel density. The interactive UV Tile Generator and unit scale system provide users with full control over UV layouts, ensuring optimal results for any project.

User-Friendly Features

The application includes an efficient drag-and-drop UV channel manager, allowing users to copy, swap, and combine UVs instantly. The Looks Shelf enables quick shading adjustments with custom MatCaps, while the Stash feature streamlines asset handling, keeping imported models easily accessible without repeated reloading. Unwrella-IO is built for speed, precision, and ease of use, helping artists focus on creativity instead of spending hours on technical adjustments. For more information and to explore Unwrella-IO’s capabilities, visit Unwrella’s official page. The price is at 150, for a forever-license. No subscription.

Note: As with any new software, it’s advisable to thoroughly test Unwrella-IO before integrating it into your production pipeline to ensure compatibility and stability.

The post Unwrella-IO: UV Mapping Made Unbelievably Easy first appeared on DIGITAL PRODUCTION and was written by Bela Beier.