Wed Sep 25 07:47:08 UTC 2024: ## Blender 4.3 Gets Major Upgrade with ‘State-of-the-Art’ UV Unwrapping Algorithm

**[City, State] -** The open-source 3D software Blender has just received a significant upgrade with the integration of SLIM, a cutting-edge iterative UV unwrapping algorithm. This new feature, available in alpha builds of Blender 4.3, offers significantly less distortion and more controllable results than existing options.

Developed by researchers at ETH Zurich, SLIM (Scalable Local Injective Mappings) works by iteratively unwrapping complex meshes. The algorithm is particularly effective on meshes with no predefined UV seams, and users can adjust the number of iterations to balance UV map quality with processing time.

The integration of SLIM was a long-term project initially started eight years ago but only recently completed by Łukasz Czyż, developer of the UVPackmaster plugin for Blender. He picked up where original developer Aurel Gruber left off and merged the code into Blender’s main branch this week.

SLIM is accessible through the Minimum Stretch option in Blender 4.3’s user interface. Visual comparisons highlight the reduced distortion produced by SLIM compared to existing Angle Based and Conformal methods.

Beyond its ability to generate high-quality UV maps, SLIM can also be used to minimize stretching on meshes that have already been unwrapped.

Blender 4.3 with SLIM is currently available in alpha, with the stable release expected in November.

**For more information on SLIM and Blender 4.3, visit Łukasz Czyż’s blog.**

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