MSC Apex Generative Design supports one solid in the optimization. If only one solid is available in the project then this solid is automatically chosen as the design space. Furthermore, all associated nondesign spaces of this solid will be considered. The boundary conditions applied to the solid can be chosen and sorted into different load cases.
If the design space and nondesign spaces consist of multiple (imported) solids the solids can be merged using a Boolean operation. This way only one solid exists and is defined as the design space. Make sure to activate the Merge Solids as Cells option to create cells that can be chosen as nondesign spaces. Further information regarding the different geometry types of an optimization here. The nondesign spaces can either be created by selecting the previously defined cells or by creating an offset of an existing design. They will be created and listed in the associated design space in the tree structure.
If multiple design spaces with associated nondesign spaces and boundary conditions exist in one project, the design space can be changed/activated as shown in the picture.
The active designspace is always visible in the Meshless Generative Design Study:
