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General => Terragen Discussion => Topic started by: N-drju on August 24, 2017, 04:18:47 AM

Title: Bubbles on the water
Post by: N-drju on August 24, 2017, 04:18:47 AM
Is there any easy or relatively easy way to modify power fractal so it has a "bubbly" look?

I would like to do wakes on my water shader so I need this effect of "perturbed" water like when a ship is cutting through the surface.
Title: Re: Bubbles on the water
Post by: Hetzen on August 24, 2017, 06:24:24 AM
Voronoi Billows flavour of noise in a PF should get you close.
Title: Re: Bubbles on the water
Post by: bobbystahr on August 24, 2017, 03:22:26 PM
Quote from: Hetzen on August 24, 2017, 06:24:24 AM
Voronoi Billows flavour of noise in a PF should get you close.

yes and set all sizes the same for round spheres.
Title: Re: Bubbles on the water
Post by: N-drju on August 24, 2017, 04:05:57 PM
Hm, okay, before I try bobby's solution there is a problem that I would like to solve first. It will probably affect all settings so let's get that out of our way first.

When I apply color function and density function I am getting a strange, bright blob around the area that should be affected. Why is that so? It appears both in preview and render as well.


[attach=1]
Title: Re: Bubbles on the water
Post by: Dune on August 25, 2017, 01:42:47 AM
Didn't you paint that white blob?
Title: Re: Bubbles on the water
Post by: N-drju on August 25, 2017, 04:19:03 AM
Of course not. ;) I used painted shader but only to mask the "stir" area behind the person. The painted shader area is shown in this amended picture.

[attach=1]

The blob's visibility increases along with volume density and volume color. I can reduce them but then I also loose visibility of the bubble fractal itslef. They are connected somehow.
Title: Re: Bubbles on the water
Post by: bobbystahr on August 25, 2017, 09:05:46 AM
Quote from: N-drju on August 25, 2017, 04:19:03 AM
Of course not. ;) I used painted shader but only to mask the "stir" area behind the person. The painted shader area is shown in this amended picture.

[attach=1]

The blob's visibility increases along with volume density and volume color. I can reduce them but then I also loose visibility of the bubble fractal itslef. They are connected somehow.


If you want the bubbles in the water I would try running it through the painted shader or vice versa, or blending them with a merge shader and run all that through the Volume channel...never tried this but it seems rational at first coffee....and leave the co;our default for starters. Could you post a render of what's actually happening as a .tgd wouldn't be usable without the objects.
Title: Re: Bubbles on the water
Post by: Dune on August 25, 2017, 10:08:00 AM
I don't understand it anymore, because now I recognize the white blob as the person object. So where is the white blob? TGD or closeup would be good indeed.
Title: Re: Bubbles on the water
Post by: René on August 26, 2017, 07:22:04 AM
Maybe this will get you on the right track.
Title: Re: Bubbles on the water
Post by: bobbystahr on August 26, 2017, 05:00:39 PM
good  share René...that oughta do it
Title: Re: Bubbles on the water
Post by: KlausK on August 27, 2017, 04:29:46 PM
Thanks for the example files.
BTW: this is something that the RTP Preview cannot handle, right?
Does it look this way (see attachment) for everyone?
Cheers, Klaus
Title: Re: Bubbles on the water
Post by: bobbystahr on August 27, 2017, 04:40:17 PM
Quote from: KlausK on August 27, 2017, 04:29:46 PM
Thanks for the example files.
BTW: this is something that the RTP Preview cannot handle, right?
Does it look this way (see attachment) for everyone?
Cheers, Klaus

yup, transparency isn't working in RTP
Title: Re: Bubbles on the water
Post by: N-drju on August 28, 2017, 02:51:49 AM
@ René - That's a very good file indeed. Stirs the water up real good.

@ Dune - Ok, let's break it down a bit. :D See yet another image. Take note however that the matter is, kind of, no longer relevant.

[attach=1]
Title: Re: Bubbles on the water
Post by: N-drju on August 28, 2017, 02:53:28 AM
Maybe he just peed in the water. :D
Title: Re: Bubbles on the water
Post by: Dune on August 28, 2017, 08:47:47 AM
Ah, that's what you mean. Maybe just a hard reflection spot? Luckily you solved it.