Very nice idea. If you just want the mountain to rise out of a totally flat
terrain, it's easy. Use scaling or water level, just like Ron described. If you
want it to grow out of rough terrain, that's more difficult. I'm this up as I
type, so I can't guarantee anything... But this is how I imagine it:
Get the POV superpatch at www.twysted.net, it has a feature called a procedural
height field (among many others). Map this height field with a layered pattern;
bottom layer being your original terrain map and top layer a map for your future
mountain (bozo or whatever, preferably with 2 component color_map). Sth. like
this:
pigment {bozo
	 color_map {[0 rgbt <0,0,0,1>]
	  	  [1 rgbt <clock/256,clock/256,clock/256,-1*clock/256>]}

Animating this _should_ give you a mountain smoothly rising from the terrain...
Just an idea. Sorry if this is not very clear. Feel free to ask, if you didn't
get it. I may try this out myself and see if it works...

I hope this helps
Margus

Luiz Barreto wrote:
> 
> Is there a way of making mountains rise from the ground using height fields?
> Could I animate some parameter and make it look like the mountain was
> forming itself from the ground?
> I thought of creating a heightfield and using different images as the source
> of it. Thru pallete rotation I could achieve a similar effect? Just tripping
> and dreaming away, but who knows?
> 
> Luiz Barreto

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