.artwork is ArtStudio Image
Key Features: .ARTWORK File Extension
What is an .ARTWORK file?
Image file created by ArtStudio, a program that provides painting features such as mixing and blending; contains a raster image and its associated properties; used for saving and sending artwork to friends via email.
ArtStudio can import images from .JPG, .BMP, .PICT, .PSD, .TGA, .TIF, and .WMF files and save them as ARW files.