*If other questions arise concerning the Wall Extension, feel free to add to this topic. Hopefully a central repository for user questions/answers for the Wall extension will develop.
There is a new extension feature called “Subtractive Geometry” (subtract for short). I won’t go into the requirements of using subtract, but details are here:
Since the Medeek extensions are parametric, modifications to the extension models use their own tool set. For instance, there are no wall extension tools to add plumbing to wall assemblies. Subtract allows for non-extension geometry to be added. Subtract basically masks the additional geometry. This prevents the added geometry from being deleted after a regeneration command in the extension (eg. after edits using extension commands).
In this example plumbing has been added to the wall assembly (image 1,2). The plumbing geometry (solids and instance names include the keyword “subtract”) will create voids in the wall geometry (image 3). The question is how to add the continuing plumbing geometry, that has been added to the wall assembly, to the foundation with appropriate penetrations (like the closet flange, image 4&5).
As always, thanks for your help.