masking

The concealment or screening of one sensory process or sensation by another.

A piece of theatrical scenery used to conceal a part of the stage from the audience.

The act or diversion of covering the face with a mask, or of wearing a masquerade dress; masquerading.

In photography, a device adopted in printing from an imperfect negative, consisting in pasting tissue-paper on the reverse side of the negative over the portions of the picture which print too deeply.

Present participle of mask.

scenery used to block the audience’s view of parts of the stage that should not be seen

the act of concealing the existence of something by obstructing the view of it

the blocking of one sensation resulting from the presence of another sensation