ARCHICAD includes a predefined set of default fills.
Use the Fill tool to draw freehand fills in the project - for example, to create patches in a Section or Elevation view.
Cover fills can also be used to embellish surfaces.
Access Fills from the Options > Element Attributes > Fills, where you can define, edit, duplicate, rename or delete them.
Assign a Cut Fill (GDL Elements)
Fill Display Mode: True Fill Appearance vs. Bitmap
Edit Vectorial Fill Appearance