A decal type contains one of the following image types: BMP, JPG, JPEG, and PNG.
Link panel
Decal drop-down
(Create new decal). The Decal Types dialog displays the new decal name and its attributes.
Click
(Browse) to navigate to the file. Revit supports image files of the following types: BMP, JPG, JPEG, and PNG.
Now you can place instances of the decal type in the building model.