For those who don’t know the tool: UVPackmaster by Łukasz Czyż (glukoz) is a GPU-accelerated UV packing plugin for Blender. It automates the tedious job of fitting UV islands efficiently, using CUDA or Vulkan acceleration, and is widely used in texturing workflows for VFX, games, and real-time assets.
Dynamic tiles, dynamic thinking
The newly released UVPackmaster 4 marks a structural overhaul of the popular UV packing add-on. Developer Łukasz Czyż rebuilt the engine to allow features that the 3.x architecture could not support. The first visible result is Dynamic Tiles, a system that automatically calculates the number of UV tiles (UDIMs) needed during packing, rather than forcing users to assign them manually.
Texel density tiers for texture discipline
Another key addition is improved texel-density management. Users can now define per-island density before packing, and introduce texel-density tiers (groups of islands linked by shared scale rules). This enables consistent texture resolution across materials without iterative rescaling.
Group layout for atlas workflows
A new Group Layout Mode enhances control over texture atlas creation. It lets users manage UV groups directly during packing, particularly useful for environment assets or game-ready atlases. Interface refinements also include the option to reposition UVPackmaster panels freely within Blender’s UI.
A re-engineered core
The 4.0 release refactors the underlying codebase for long-term extensibility. According to official statements, UVPackmaster 3 will continue to receive maintenance updates until at least 2027, but will not receive any new features. The redesigned engine introduces better multi-platform stability across Windows, Linux and macOS, including Apple Silicon.
Still a GPU workhorse
As before, UVPackmaster can use either CUDA or Vulkan for acceleration, allowing both NVIDIA and AMD GPUs (and Macs) to benefit. The packer continues to support multi-threaded CPU fallback, UDIM workflows, per-group packing and heuristic search algorithms to improve UV fill efficiency.
Licensing and support
UVPackmaster 4 is priced at US $53 for a single-user licence, with higher-tier studio options available. It supports Blender 2.83 and later on 64-bit systems. As always, we recommend testing new software releases in controlled conditions before full adoption of the pipeline.
