Preview of a three-dimensional image or scene creating with Artlantis, a 3D rendering program; typically saved along with another image file (such as a .TGA file); allows the 3D image to be previewed before opening it.
Program(s) that open prw files
Mac / Windows: Abvent Artlantis; Graphisoft ArchiCAD with Artlantis plugin
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/prw
