Foam bubbles on water
Posted: 08 February 2019 03:31 PM   [ Ignore ]  
Total Posts:  54
Joined  2013-11-17

Any idea how to create the bubbles on the edge of the water (see image attached)?

Can use textures with voroni bump/displacement to approximate small bubbles (second image) but can’t work out how to insert large bubbles so that water shows though.

Thanks…

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Foam reference.jpgFoam test_02.jpg
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Posted: 08 February 2019 06:37 PM   [ Ignore ]   [ # 1 ]  
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Hi Chris,

A scene file would be nice, so I have all the pieces of information about how you would like to work. So, perhaps I can see much faster why you can’t see the underlying texture. Currently, I have no idea what you have set up. A tip would be, perhaps check the Render Settings>Options. But I’m guessing here, which I find more and more professional.
For example, I could see if the spheres are hollow or work like glass-marbles, but again, I start guessing here. Here is a bubble sketch, use the CV-HDRI or your own:
Scene file
https://www.amazon.com/clouddrive/share/xJAnH8LeehERZqIvLq1qe3GBWTS4ANK9cdlr1S7GtGM

You should also share how close the camera goes, i.e., how fine the details are. Which means, given a particular resolution, if spheres are really needed, or if a Bump, Displacement or Normal map can do the trick. No idea at the moment.

I’m aware that fluid simulations are not the central domain of native tools, I do not promise anything here. Over the last decade+ I have seen Foam options showing up from time to time. However, given the fact that they have vanished might an indicator of the quality.
I guess a completely different game is given with X-Particles, but I have sadly no access to a license, so I can’t go there. Perhaps check over in their forum, if there is something that works for you.
http://docs.x-particles.net/html/foam.php

To get the edge between water and beach, Fields seems to be the fastest way, an excellent source of ideas is this one here
https://youtu.be/W51e6aT_SU8

Here is a little sketch, to get the discussion started.
Scene file
https://www.amazon.com/clouddrive/share/EvV7J6n41IOAch3eiT8Trdi9MNgswSu5V85zh4x3w1w

Enjoy your weekend

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Dr. Sassi V. Sassmannshausen Ph.D.

Photography For C4D Artists: 200 Free Tutorials: Texture, Panorama, HDRI, Camera Projection, etc.
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Posted: 09 February 2019 09:46 AM   [ Ignore ]   [ # 2 ]  
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P.S.: a little screen-shot of my bubble sketch (see post #1)

https://www.amazon.com/clouddrive/share/qmtCtYaDXVaagKiz9Y5pTPVKOU8GQdJkqOg3NcS9wCz

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Dr. Sassi V. Sassmannshausen Ph.D.

Photography For C4D Artists: 200 Free Tutorials: Texture, Panorama, HDRI, Camera Projection, etc.
https://www.youtube.com/user/DrSassiLA/playlists

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Posted: 11 February 2019 01:12 PM   [ Ignore ]   [ # 3 ]  
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Joined  2013-11-17

Big thanks for all of that..

I guess using x-particles is the most realistic option because you need a huge number of particles to model tiny bubbles and C4D will slow down. The other issue is modelling the transition between dry sand and wet sand on a beach - probably use vertex maps and fields to animate diffuse and specularity. Unfortunately I’m using VRay to render and it is doing the same weird gradient error that ProRender does.

Will fiddle some more. What you provided was useful in terms of approaches

Thanks
Chris

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Posted: 11 February 2019 01:22 PM   [ Ignore ]   [ # 4 ]  
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You’re very welcome, Chris, thanks for the feedback.

I sadly have only a limited immersion with X-Particles, based on a more extended trial they offered me a few years ago. Since it is a third party product, I have problems to support this, while perhaps doing not the same for all of the great plugins available for Cinema 4D. Since there are many hundred well-crafted plug-ins available, it is hard to keep it fair.

Yes, wet-maps can be positively done with Fields (e.g., Decay), and to keep it along with any workflow, you might consider baking those effects into image sequences. Images are indeed a core element of any render solution while taking advantage of their “calculate once and use often” quality. Yes, baking has a drawback, as it has to be redone after every single change.

Anyway, I believe profoundly that the most amazing things will happen based on “fiddling around” and be aware when a gem shows up. To not just limit oneself for best practice approaches, but to be open to explore and push the envelopes, there is the spirit that moves our craft and art.

ENJOY

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Dr. Sassi V. Sassmannshausen Ph.D.

Photography For C4D Artists: 200 Free Tutorials: Texture, Panorama, HDRI, Camera Projection, etc.
https://www.youtube.com/user/DrSassiLA/playlists

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