But frequently the maps were slow to update, leaving big blank areas on the screen. (cnet.com)
The wall measures about 15 ′ wide, not counting the bay window, so I had these two rather large blank areas on either side of the buffet. (worthingcourtblog.com)
Vignetted - some background is painted but only to focus attention on the main image, with blank areas at the edges of the picture: (arttutor.com)