The name of the attribute to use for the texutre coordinates. Usually this is uv. If you're layering multiple UVs on the same geometry, you can enter a custom attribute name.

(If you're using this node to do general layout in 3D, you could use P to project the model’s point positions down onto the packing plane.)

If this is blank, the node works on all incoming geometry. You can enter the name of a primitive group, or specify primitives using group syntax to operate on only a subset of primitives.

Re-scales islands to their relative areas measured using the UV attribute match their 3D surface area measured using P. This means large 3D surfaces will get large UV islands, and small 3D surfaces will get small islands.

(The overrides above are applied after this rescaling.)

How/whether to align islands before packing.

Controls how the node scales the islands for packing.

If you choose “Fixed”, islands that fail to pack are lined up outside of the bounding box of the packing targets. You can get a primitive group consisting of the polygons of these “non-packed” islands in Output Groups and Attributes (see below).

When Pack into is “UDIM Tiles”, if you use a fixed scale, the node will fill as many tiles as can fit the scaled islands.

The node can try different island rotations to get better packing (some islands may be able to fit into a smaller available space if they are rotated slightly). Setting this parameter is a tradeoff between allowing rotations reducing axis alignment, trying more rotations giving more efficient packing, and trying lots of rotations being slow.

This controls what to do when you use the Group field to apply this node to only a subset of the polygons in the input. When this is on, the node attempts to pack the polygons selected by the Group field around the other polygons in the input. When this if off (the default), the node will ignore the other polygons, possibly giving overlaps in UV space.

When this is on (the default), the node will attempt to pack islands inside “holes” and concave areas in other islands. Turning this off is faster but gives less efficient packing.

The amount of padding to use to separates islands.

This number is in “pixels” of the Search resolution (under Advanced), so changing that number will change the padding distance in UV space.

When this is on, padding is added between islands and the edges of the target space. When this is off (the default), islands are packed right up to the edges of the target space.

Attempts to automatically increase padding so islands spread to cover the target area.

(Normally the packing algorithm bunches up islands in tight corners as it progresses in order to leave as much space as possible for packing of subsequent islands. When this is on, once the packing is achieved, the padding is gradually increased to the maximum possible amount that still allows the same packing coverage. The effect of this is usually to spread the islands around in the available space. Note that this does not guarantee a uniform spreading as the fragmentation of the available space by the packing process can restrict free movement of the islands in some cases.)

Controls how the

If you leave this off, islands will be distributed to targets based on where they fit best. If you turn this on, islands will be packed into this target unless an overridden.

This is particularly useful when UDIM packing.

Detect and stack identical islands over each other.

When Stack identical islands is on, also detect islands that would be identical if reflected, mirror one and stanck them over each other.

When Stack identical islands is on, also look at islands that are not selected in the Group field, and if one matches a selected island, stack the selected island on the non-selected island.

This is useful if you have prototype island shapes already in place and want to put islands with similar shapes over them.

When Stack identical islands is on, how close the shapes need to be for them to be stacked. You can tweak this number until the islands you want to stack start stacking.

Output a group containing the polygons of any islands that failed to pack because Fixed scaling made them too big.

Add a primitive attribute to each polygon containing the number of the island it was a part of.

Add a primitive attribute to each polygon containing the number of the target it was packed into.