Auto Repacking

Using the Auto Repacking functionality you can configure a number of mesh objects for UV repacking and then repack them all at any moment in a single-click operation.

Note: the Auto Repacking feature is supported starting from Blender 4.2.

Object configuration

In order to configure a mesh object for repacking, make it the active object, then go to Viewport 3D → N panel → UVPackmaster3 → the Object Options panel:

The Object Options panel displays all UVPackmaster options assigned to the active object. Note: while the entire UVPackmaster UI is located in the N panel of the UV editor, the Object Options panel is an exception to this - it is available in the N panel of the 3D viewport.

In order to enable auto repacking for the given object, turn Enable Auto Repacking on:

Expand the Add UV Map To Repack menu and select the UV map which you want to enable repacking for. Note that if the objects has multiple UV maps, you can add/remove/configure UV maps for repacking individually:

Once a UV map was added to the list, you can configure which option set to use when packing the map. If you want to define option sets individually per object / UV map, enable option sets for the given Blender scene. You will find more info on option sets here.

Configure multiple objects / UV maps in the scene for repacking using the procedure described above.

Repacking

In order to repack all objects configured for repacking in the scene, go to the main UVPackmaster tab (in the N panel of the UV editor), and go to the Other Tools multi panel → Auto Repacking panel:

Press the Auto Repack button. The operation will perform the following steps for every object / UV map pair configured for repacking:

If the object is currently hidden in the scene, report a warning and stop processing the object, proceed to the next object / UV map pair.
Select the object, deselected all other objects in the scene.
Make the UV map the active map.
If this isn’t the first repack attempt for the given object / UV map pair:
- check if UVs of the map or packing options have been changed by the user since the last repack operation was performed,
- if they haven’t been changed and Force Repacking is off, skip the current object / UV map pair and proceed to the next object / UV map pair.
Select all visible UVs in the map. If the map contains hidden UVs, report a warning (only the visible UVs are going to be packed).
Run the Pack operation for the selected UVs using the selected option set (or default packer options if option sets are disabled in the scene).
If the Show Results option is enabled, pause the operation, switch to the Edit mode and show the packed UV map to the user. Wait until the user presses the Space button.
Proceed to the next object / UV map pair and repeat the steps.

The Auto Repack operation will output info on per object / UV map operation result in a summary: