Don't forget my rubbish tutorial
http://photoshopcontest.com/tutorials/25/the-liquify-filter.html
well it EXPLAINS it i guess but not much else
edit: infact here's the useful bit
the key to all of this stuff is practicing!
the liquify filter tools
warp tool (w) or the forward warp tool (w) depends on the version of photoshop
much like the smudge tool, although tends not to lose sharpness or details. all together more accurate.
turbulence tool (a)
acts a bit like a brush jitter. great for distortion but thats about it. as far as im concerned not so usefull.
twirl clockwise tool (r)
acts like the distort>twirl filter only in brush form if that makes sense. if it doesn't dont worry it's pretty self explanitry.
twirl counter clockwise tool (l)
i would hope this is self explanitry
pucker tool (p)
works as a brush retracting pixels from the edge (i think i can say that) the basic effect of which it that you can shrink areas.
bloat tool (b)
works the opposite effect of the pucker tool and enlarges area. its works partly like the distort>spherise filter (i think thats what it's called, its too late at night)
shift pixels tool (s)
works like the warp tool apart from it tends to shift whole blocks of pixels in a certain way instead of the center. takes practise and patience of which i have neither.
reflection tool (m)
the only use i found for this is creating refraction in glass, but it only works in some situations and its hell to get right
reconstruct tool (e)
surprisingly usefull. reconstructs parts which you have just 'liquified'. main uses are getting back wrongfully changed parts while not reconstructing the WHOLE image. you'll know what i mean when you use it.
masks- freeze tool (f)
it stops the tools having any effect on cerain areas of the picture- define these areas with this brush (represented by red)
masks- thaw tool (t)
it removes parts of the 'masking' you just put on with the freeze tool