Stacking objects in 3D

Choose how one object builds, cuts, overlaps or follows another object.

Stack establishes a live relationship between supported objects. This differs from merging them into one finished object: while a relationship remains live, the result can follow later changes to its source objects. The available operation depends on both objects and the surface you pick.

Choose a Stack operation

In 3D, open Stack in the modeling tools. Its choices include Build, Highest, Lowest, Dig, Overlap, Wrap, Place on and Separate. Unavailable operations show a reason.

Pick the object and target

Choose the object whose effect you want to apply, then the target object or target face as prompted. An object cannot target itself or create a circular relationship. For operations that require a solid parent, create that solid with Push/Pull first.

Choose the effect

Build adds volume; Dig cuts into the target. Highest and Lowest use the higher or lower surface height. Overlap keeps an overlapping result where supported. Wrap follows the chosen surface; Place on places an object on a picked face. These operations have different eligibility rules.

Adjust placement and offset

For a live relationship, the available stack controls can include Placement, On a face, Where it is, Orientation, Keep upright, Align to face and Surface Offset. Only use controls offered for the current relationship. Right after stacking, a typed Surface Offset can amend the operation.

Separate or make the result permanent

Separate removes the relationship. Where offered, Merge into one object turns a supported Build, Dig or Highest relationship between solid objects into a single result after confirmation. Read the confirmation: the tool object is removed unless you started that action with Alt held. Undo can restore the previous state.