Playing with effects

I can tell from the Blips I've looked at today that it's been one of those wet days where no-one really wants to step outside to take a photo. Lots of still lifes, garden birds and squirrels, and indoor shots. I can't say I'm any different; after a swim this morning I've been firmly indoors all day so short of a picture. So, started messing around with effects and discovered a 'negative' effect which was quite interesting. I'm not sure it has any practical use, but at least it got me a Blip for today.