About Support Structures
Support structures are auxiliary structures that support the models that you print in additive manufacturing. There are two ways to create support structures:
• Define a part that was created in Creo as a support structure. Only a part that is a sub-component of an assembly can be defined as a support structure.
• With a Creo Additive Manufacturing Plus Extension for Materialise license, you can use the Materialise SG+ module to generate support structures in Creo.
User-defined and Materialise support structures on the same tray
A tray assembly can contain user-defined support structures and support structures that you generated using Materialise on the same tray.
• If an assembly on the tray contains any user-defined support structures, and you click 
Generate Support to generate Materialise support structures, then Materialise support structures are not created for the entire assembly that contains a part that is defined as a user-defined support structure.
Generate Support to generate Materialise support structures, then Materialise support structures are not created for the entire assembly that contains a part that is defined as a user-defined support structure.• You can define a part as a support structure even after the model already contains support structures generated by Materialise.