One thing about sitting around a fire there's lots of time for app exploration. Here's another one that I think will make some killer thermofaxes. Or maybe just fun for playing around. It's an iPhone app, but I'm using it on the iPad with imported photos. The palm tree, a reaction to days of snow?
It's called News Flash (corrected title!) by the way, but what it does is a dot screen, like an old time half tone. Or you can translate to lines or waves. I like the dots best. Look under MORE for other controls.
I can't put in the app store link as I am working on my iPad, but with the right name it should show up in the app store. I am using the iPhone version on my iPad.