Pack UV Islands Node

The Pack UV Islands node rearranges UV islands so they efficiently fill a given UV space. It scales, translates, and optionally rotates islands while keeping a defined margin between them. This is useful for procedurally optimizing UV layouts inside Geometry Nodes workflows, such as generating texture atlases or preparing geometry for baking.

Tipp

Unlike the UV Editor operator, this node works non-destructively and can be driven by procedural inputs, making it suitable for automated or parametric UV generation.

Inputs

UV

The UV map to pack. The topology of UV islands is determined from this input.

Auswahl

Faces to consider when packing islands. Only UV islands that include at least one selected face are affected. UVs belonging exclusively to unselected faces remain unchanged.

Margin

The distance to leave between UV islands, expressed in UV space units.

Rotate

Allow rotating islands to achieve a more efficient packing result.

Method

Determines how the shape of each island is evaluated during packing.

Bounding Box:

Uses the axis-aligned bounding box of each island. This is the fastest method but may be less space-efficient.

Convex Hull:

Uses the convex hull of each island. This method will not place islands inside holes and provides a balance between accuracy and performance.

Exact Shape:

Uses the full island shape, including concave regions and holes. This produces the tightest packing but is the slowest option.

Bottom Left

The bottom-left corner of the region into which islands are packed.

Top Right

The top-right corner of the region into which islands are packed.

Output

UV

The packed UVs, with islands repositioned and scaled according to the node settings.