We've all seen wads where the palette is changed around to give wads some personality (NJMarine, RTC-3057, uh... Zen too), but as far as I know I've never seen one where the palette has been turned topsy-turvy upside-down, creating something really original. I had a go with it and had some trippy results. Funny how playing with a different color scheme can make things seem so bloody different.
So, why not give this a shot? I challenge you to create a simple palette modification that makes DooM feel crazy-different (without being dumb--tutti-frutti is overrated!) and post it here for everyone to gawk/laugh/freak out at.

To start, nab this image and your favorite image-editing tool or alternatively this nifty little program (thanks Shin and Spidey!) to shift the colors around to your liking. Use the linked tool to export the palette as an .ACT, and import it into a wad with XWE as the PLAYPAL lump. Voila!
If enough people submit things, I might wind up turning this into a contest of sorts, but we'll have to see how things turn out first.

To start, here's my 'submission', "Coldwave" I call it. I pumped up all the blues/purples and it wound up making DooM have a strange, surreal "chilled" look. The purple doesn't even seem that far out of place, somehow. Nab the attachment and give it a whirl if you dare.

A few screenies:






So... have fun!