Effect of ´smudged´ backround

[tomfyhr]

Does anyone know which effect is yielded by having the color of the backround of an image be "smudged", instead of e.g having sharp brush strokes?

[Dreamwoven]

You might like to look at "pictures take by you" on this website: http://www.online-literature.com/forums/showthread.php?20158-Pictures-Taken-By-you/page266