It is possible to override the mesh asset assignment of an entity after a simulation is started thanks to a dedicated dockable tool.
The Golaem Set Mesh Assets tool displays mesh assets for the currently selected entity:
Set Mesh Assets windows
Both panels displays the asset groups in which mesh assets are located within the character file. To select/unselect a mesh asset for the entity, double click on it, or select several of them and click on the >> or << arrows.
Any mesh asset override will be written as a Golaem attribute, and can be deleted trough the Golaem Attribute Spreadsheet:
Golaem attribute spreadsheet showing a mesh asset override on entity
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