Frequently asked questions
Quick answers to the most common questions. Still stuck? See Troubleshooting or the support contact in License & terms.
Which Blender versions are supported?
Blender 3.6 LTS, all of 4.x, and 5.x. Every release is smoke-tested against real Blender 3.6, 4.2 and 5.x builds before it ships.
Does it need any external libraries or an internet connection?
No. TexelPack runs entirely on Blender's bundled Python. There's nothing to pip install and no connection is required after download.
How is this different from Blender's native “Pack Islands”?
Native Pack Islands fits islands into the 0–1 space. TexelPack adds shape-aware packing, texel-density normalization and visual overlays, stacking of identical/mirrored islands, UDIM and group packing, packing destinations, per-island margins with pixel-exact padding, preview, presets, JSON/CSV/SVG export and a headless API. See the packing reference.
Can it pack several objects into one atlas?
Yes. Select multiple mesh objects and TexelPack packs them all into a single shared atlas in one operation. You can also pack one UDIM tile per object, material or collection.
What does “texel density” actually do for me?
It scales each island to the real 3D surface area of its object, so every surface gets consistent texture resolution — no more crisp crates next to blurry props. You can preview the result with the viewport overlay before baking. See Texel density.
Will it ruin my hand-tweaked UVs?
Only if you ask it to. Pinned islands (P) stay put, you can pack only a selected subset, and Preview lets you inspect the result before applying. Every operation is a single undo step.
Is it fast on heavy meshes?
Yes — island extraction is vectorized with numpy (a 100k-polygon mesh analyzes in well under a second), and packing runs in a background thread so the UI stays responsive and Esc cancels.
Can I automate it / use it in a pipeline?
Yes. The packing engine is a pure-Python API and there's a headless batch driver for processing whole .blend libraries. See Python API & batch.
Can I change the add-on's language?
Yes. TexelPack's panels and messages are available in English, Spanish, Portuguese and Simplified Chinese. By default they follow Blender's interface language, but you can also force the add-on's language independently — without changing Blender — in Preferences → Add-ons → TexelPack → UI Language. (Note: a few items translated by Blender itself, such as some dropdown values and tooltips, still follow Blender's global language.)
What's the license? Can I use it commercially?
The add-on source is GPL-3.0-or-later (required for Blender add-ons), and you can use it on commercial projects. Your purchase covers tested release builds, all future updates and support. See License & terms.
I used to have “UV Packer Pro”. Is this the same thing?
Yes — same add-on, same author, renamed to TexelPack to avoid confusion with other products. Remove the old add-on before installing (see Installation).