You may see wall frame moulding in houses that are striving for a very formal, English look. It is a purely decorative wall element. The most common use is when you find four pieces of moulding assembled to create the look of a picture frame.
The moulding can be painted a different colour from the wall, but if it is painted the same colour as the wall, shadow effects are pronounced.
A panel mould or panel moulding can refer to a variety of moulding profiles most often used to create or embellish panels on either flat or recessed surfaces. These mouldings are commonly used on doors, walls, architectural panelling, mantels and cornice assemblies.