Dunno about others but I made mine using PhotoShop CS2 (any older version would have been OK too) and lot's of sweat, basically.
Smear tool was used extensively like gzillions of PS layers with varying blending modes... I also adjusted brightness / contrast and hue a lot, and did some levels / curves tweaking too. Sharpening and gaussian blur filters were handy too. Can't remember if I used radial motion blur but it can be a useful too in a case like this.
Not exactly "exactly how" but it's impossible to do a "tutorial" because these come after lot of experimenting and playing around, for me at least.
Smear tool was used extensively like gzillions of PS layers with varying blending modes... I also adjusted brightness / contrast and hue a lot, and did some levels / curves tweaking too. Sharpening and gaussian blur filters were handy too. Can't remember if I used radial motion blur but it can be a useful too in a case like this.
Not exactly "exactly how" but it's impossible to do a "tutorial" because these come after lot of experimenting and playing around, for me at least.