Author Topic: Animated cloud, looking for tutorial and techniques  (Read 225 times)

Offline Frank_Art

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Animated cloud, looking for tutorial and techniques
« on: October 15, 2018, 07:23:53 PM »
Hi all,
I'm looking for tutorial to learn how to animate clouds in Terragen4 and export it as a Flow Maps ... is it possible?
This is the type of effect i'm looking for

Cheers

Offline Oshyan

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Re: Animated cloud, looking for tutorial and techniques
« Reply #1 on: October 15, 2018, 09:43:20 PM »
For any cloud but "Easy Clouds", you can animate them using a Transform Input Shader between the cloud density fractal and the density shader input. Translation on X and Z will move the cloud layer across the sky, translation in Y will make the cloud appear to "evolve" (the shape will change smoothly, as shown in your example video). For Easy Clouds, we will be releasing a 4.3 update with built-in animation functions in the near future.

I don't know what a "flow map" is, but you won't really be able to export the clouds at present. We have in-development OpenVDB export, but you'd just end up with a series of VDB files I believe. Which might be a challenge to do anything with in another package (depending on its volume handling capabilities).

What is your end goal?

- Oshyan

Offline Frank_Art

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Re: Animated cloud, looking for tutorial and techniques
« Reply #2 on: October 16, 2018, 03:18:08 PM »
Hi Oshyan,  thanks alot for your answer:)
My final goad is to do an animated skybox for game, if I can export clouds as VDB I maybe will be able to create those "flowmaps" in Houdini.
Here an example of the effect I can achieve using flowmap
, maybe there are others way to get there.
Cheers

Offline Oshyan

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Re: Animated cloud, looking for tutorial and techniques
« Reply #3 on: October 17, 2018, 10:15:19 PM »
Ah, I see. Well, you can animate clouds in Terragen in a variety of ways (with a licensed version you can animate literally any setting), and could render that out to a sequence of images to load in your game background. Alternatively you can do post processing on a still frame Terragen render in another app as shown in the video. Does your game engine directly support texture distortion via flowmap?

- Oshyan

Offline Frank_Art

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Re: Animated cloud, looking for tutorial and techniques
« Reply #4 on: October 18, 2018, 05:41:11 PM »
yes, so probable the best way is to render single frame of some clouds separately with transparent background using render layers and then "animate" them separately using flowmap technique.

Offline WASasquatch

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Re: Animated cloud, looking for tutorial and techniques
« Reply #5 on: October 19, 2018, 05:33:36 AM »
Sorry to interject here, but since this seems to be about whether or not TG is good for clouds:

Would it be safe to say Terragen is a good source for "Clouds from Scratch; and one of the most powerful". I noticed a lot of software, including what my friend is using, is sorta based on preset models, somewhat like Easy Clouds. Asking for a friend.

What I gather, and from experimentation, you can achieve pretty much anything you can think of as far as clouds/gaseous stuff, and even noisy water (waterfalls)
Art can be a window into the soul

Offline Hetzen

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Re: Animated cloud, looking for tutorial and techniques
« Reply #6 on: October 19, 2018, 11:11:25 AM »
I think the best way of thinking about TG clouds, is that the renderer paints a spot where white is in the texture and that texture is infinitely changing over distance giving variation. A lot of software uses a box to define the bounds of the effect, especially dynamic systems, which is great for hero stuff, but with vistas you start to run out of ram, which is where TG excels at mid to far range scenes.

 

anything