Niagara Falls

[Dune]

Testing something again, and ran into something I can't figure out (yet). I used a simple shape as a basin, warped by a perlin with minimum size of 5m. OK. I wanted to warp the top 10m of the falls by the same fractal, but with smallest size 1m (to soften the water falling from the top down), so I added them, masking the small sized fractal by a distribution shader with height restraint. Nice theory, I thought, but it doesn't work. Tried different setups, but still...  I'll make it work though, but it's harder than I anticipated.
The water is just a reflective shader, by the way, there's no lake or water shader used. 

[bigben]

Very interesting effect. 
Rather than change the scale of the second PF, maybe increase roughness and/or contrast?

[Kadri]

Looks interesting Ulco.
I have an ongoing project in that i will run into this problem too probably.
It is not a waterfall but the shape is kinda similar but rocky.
Curious what you will do.

[N-drju]

Not too bad I guess. It looks a little bit uniform but only after you take a closer look at it. It DOES look like waterfall tough.

Damnation, do you guys know where I could find that .pdf tutorial on making small, vertical waterfalls? The first page of the document has a picture of the waterfall with some mist on the water surface. I grabbed it once but probably deleted it. You know what I'm referring to?

[choronr]

The beginnings of a very interesting evolution ...looking forward.

[Dune]

@Ben: it just doesn't work, I can't get the height to work right for the warp, neither with final position, nor position in terrain. So I just added another vector displace at a later level with height restricted additional small perlin. That works fine.

[kaedorg]

second is much better. It has more volume with the variation of colours.
still a problem with the white parts i would say

[choronr]

That is a big improvement.

[oldm4n]

very good image

[Upon Infinity]

Nice idea.  Good work.

[DannyG]

Thats excellent as always Ulco, very convincing

[bigben]

If you have a function doing the displacement then you don't really need an altitude mask. Your displacement function is one. Plug that into a colour adjust shader and you have very precise control over the mask. Gamma adjustment might be useful in this case as well.

[TheBadger]

Hi Ulco. looks very good so far. I downloaded sat data of this location a while ago. Hope to use realflow for the water.

Thanks for the good inspiration! Im sure you will get it the way you want!

[Dune]

It won't work from the top, see attached simple setup.  You can't get the distribution shader to work at that level. But like I wrote, the remedie is simple, just add finer VDISP after compute terrain.

[Dune]

Redone, but now with the falls attached to a plane for more control over the terrain.