I don't think this has been posted before, and it isn't process heavy, but I'm sure someone will be interested in it.
In the animated movie Hellboy: Blood and Iron there are several instances of semi-process, most notably the final battle between Hellboy and the goddess Hecate, within which she goes from a 10-12 tall foot naga to a 20 (and eventually 30) foot metal iron-maiden-style naga, and eventually a sort of green crystal naga with smoke for hair that I would estimate is around 50-feet tall. The only real visible process is one growth spurt she has when Liz tries to set her on fire, and her reverting back into a regular iron maiden when exposed to Sunlight.
There is also some AR content as well, when a heavily-decayed Vampiress bathes in blood and reverts to her younger form. She very soon reverts back, however.
The dvd isn't very expensive, like $14.99 off of just about any site you can get dvds. The best I can do for free is this clip of Hellboy's first encounter with Hecate
I don't reccommend anyone getting their hopes up unless they're real hard-up for giantess/growth content. But in any regard, its a -great- movie, especially for fans of Hellboy (the original movie cast does the voicing for the main characters).