Hi there,
You want to avoid setting family materials in the family editor. It means you need to edit the family each time you want to change the material.
Rather add a material parameter & specify the material in of the family in the project when clicking "Edit Type" on the properties dialog.
Depending on how many materials you family consists of, do the following for each material assignment.
Click the geometry you want to assign a material to & follow the steps 1 - 5
Step 1: Click Geometry
Step 2: Add Material Parameter
Step 3: Give material parameter a name
Step 4: Save Family & load into project. Click Edit Type on properties dialog
Step 5: Specify the desired material in the project & your family will update.
