Okay, this is going to sound like a crazy request, but here it goes: I live in a house, it’s a nice and perfectly respectable house as far as houses go, and like all self respecting houses it has walls… way too many walls. The problem is that, even though as a writer I spend way too much time indoors,  I am not too fond of walls to begin with, so can anyone think of a cheap (think flat out broke), easy (and preferably upcycling/recycling/whatever) DIY project that could possibly get a wall to look a little less like a wall?

Yes, I know, I should just paint them every five years or so and forget about it, but I figured I might just as well ask if someone had a better idea. Bonus points for mold resistance (as I have mentioned more than once, I live pretty close to a river, the house gets flooded on a regular basis,  and humidity  usually ranges between 70 and 100%… though sometimes it feels like it’s even higher than that) and for an idea that can accommodate some artwork.