Subtracting Solids The Subtract Solids command cuts (subtracts) one or more 3D objects from another 3D object, creating a new model. The subtracting object should extend beyond the surface of the original object. To subtract solids: 1. Select both the object(s) to subtract and the object to subtract from (the base object). 2. Select Model > Subtract Solids. A dialog box opens. 3. Select the desired object to subtract. Use the forward and back arrows to select the base object, which is shown with a thick outline. 4. Click OK. VectorWorks creates a single solid model with the selected object subtracted.