Example of uneven plaster causing distortion of the painted scene

Unevenness or deformation
Parts of the plaster which, for a variety of reasons (static changes, infiltration of moisture, previous restoration work or detachment, etc) are no longer sitting on the surface where they were originally laid, sometimes causing distortion in the view of the painted scene. In most cases, the damage is the result of the plaster's breaking up and the pieces moving outwards, then being consolidated without taking care to return them to their original position. This type of situation arises mainly along the main lesions, especially in the roof vaulting and the right wall, and in areas where the plaster has been deliberately detached for restoration purposes.