What it does
UVPackmaster provides UV packing and island-stacking tools, with integrations for Blender, Maya and 3ds Max. The Blender edition includes grouping, texture-density controls and CPU or GPU packing. The packing engine is licensed through a one-time fee for personal or commercial use.
In Blender, select UV islands and use Pack in Single Tile mode to fit them into the unit UV square. Precision defaults to 500. A low value can allow overlaps, which the tool selects and warns about; increasing precision costs more processing time. Basic Margin changes with island scaling, so use Pixel Margin when you need a specific gap in pixels. Fixed Scale preserves absolute island scale, although it can leave unused space.
Version 4 can use NVIDIA CUDA or Vulkan. Enable a Vulkan device in the add-on preferences and save Blender preferences to keep the setting. Vulkan supports AMD Radeon and Apple M-series GPUs as well as other supported devices. Groups Together packing is unavailable on Vulkan, so that mode falls back to another compatible device or the CPU.
The Blender edition offers Single User, 2-to-5-user Studio and 6-to-10-user Studio licences. The purchase fee covers the engine licence for personal or commercial use. Blender add-on code uses GPL terms, while the engine has a separate licence that prohibits redistribution and modification.
Strengths
- Named groups and density settings control texture-space allocation.
- Island alignment and stacking complement packing.
Watch out for
- Vulkan devices cannot run the Groups Together packing mode.
- Low packing precision can produce overlapping islands.
Best for
- Artists organising UV space across related game assets
- Blender users controlling packing margins and texel density
Sources
- Get UVPackmaster | Host Integrations (Oct 28, 2026)
- UVPackmaster for Blender | Features (Oct 28, 2026)
- UVPackmaster 4 | Basic Packing and Options (Oct 28, 2026)
- UVPackmaster 4 | Vulkan GPU Acceleration (Oct 28, 2026)
- UVPackmaster 4 | Developer Store (Oct 28, 2026)
- UVPackmaster Engine 4 | End User Licence Agreement (Oct 28, 2026)