Live Meshes is an add-on that enables the modification of mesh primitive parameters after their initial creation in Blender. It replicates the behavior of native Blender mesh primitives, allowing for adjustments such as changing the number of sides on a cylinder at any point in the workflow. The tool supports procedural modeling approaches by removing the need to finalize primitive settings immediately upon adding them to a scene.

In addition to standard primitives, the add-on introduces a Box primitive with independent X, Y, and Z dimension controls. It also includes a Geometry Nodes primitive, which creates an empty mesh object containing a blank Geometry Nodes modifier, intended for building node setups from scratch. The add-on supports Geometry Nodes Gizmos.