Author Topic: Bubbles on the water  (Read 638 times)

Offline N-drju

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Bubbles on the water
« on: August 24, 2017, 08:18:47 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.
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Offline Hetzen

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Re: Bubbles on the water
« Reply #1 on: August 24, 2017, 10:24:24 AM »
Voronoi Billows flavour of noise in a PF should get you close.

Offline bobbystahr

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Re: Bubbles on the water
« Reply #2 on: August 24, 2017, 07:22:26 PM »
Voronoi Billows flavour of noise in a PF should get you close.

yes and set all sizes the same for round spheres.
« Last Edit: August 24, 2017, 07:28:27 PM by bobbystahr »
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Offline N-drju

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Re: Bubbles on the water
« Reply #3 on: August 24, 2017, 08:05:57 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.


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Offline Dune

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Re: Bubbles on the water
« Reply #4 on: August 25, 2017, 05:42:47 AM »
Didn't you paint that white blob?
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Offline N-drju

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Re: Bubbles on the water
« Reply #5 on: August 25, 2017, 08:19:03 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.

75649-0

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.
"I don't know what 'pokygon' is but I like it."

Offline bobbystahr

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Re: Bubbles on the water
« Reply #6 on: August 25, 2017, 01:05:46 PM »
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.

(Attachment Link)

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.
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Offline Dune

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Re: Bubbles on the water
« Reply #7 on: August 25, 2017, 02:08:00 PM »
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.
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Offline René

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Re: Bubbles on the water
« Reply #8 on: August 26, 2017, 11:22:04 AM »
Maybe this will get you on the right track.

Offline bobbystahr

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Re: Bubbles on the water
« Reply #9 on: August 26, 2017, 09:00:39 PM »
good  share René...that oughta do it
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Offline KlausK

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Re: Bubbles on the water
« Reply #10 on: August 27, 2017, 08:29:46 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
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Offline bobbystahr

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Re: Bubbles on the water
« Reply #11 on: August 27, 2017, 08:40:17 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
something borrowed,
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Offline N-drju

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Re: Bubbles on the water
« Reply #12 on: August 28, 2017, 06:51:49 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.

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Offline N-drju

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Re: Bubbles on the water
« Reply #13 on: August 28, 2017, 06:53:28 AM »
Maybe he just peed in the water. :D
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Offline Dune

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Re: Bubbles on the water
« Reply #14 on: August 28, 2017, 12:47:47 PM »
Ah, that's what you mean. Maybe just a hard reflection spot? Luckily you solved it.
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