Volumetric Clouds - Source

re: Volumetric Clouds - Source

Nemo Krad — Fri, 30 Jul 2010 18:25:03 GMT

Matt,

Sorry for the late reply, PM me here and I can see what I can do to help :)

re: Volumetric Clouds - Source

Matt — Thu, 03 Jun 2010 21:55:31 GMT

Hello Nemo,

I am trying to integrate your code in a prototype that I am developing as a way to generate Space clouds.

The problem is that I have been trying to make them visible, and until i am only able to see them very small. Almost invisible when compared with planets and stars.

I have been trying to change the parameters as to render them much more larger, but until know no success.

How can I scale everything up?

Do you have an email where I can contact you?

Regards,

Matt

re: Volumetric Clouds - Source

Nemo Krad — Sat, 18 Apr 2009 14:50:34 GMT

Omar,

Lots of billboards, some post processing and some nice sound effects.

Sandstorm,

As you can see I am using the time for the random seed, this sleep ensures that the seed is different each time. I will have to look at the code again to remind me why, but that's what the sleep is for in that case.

re: Volumetric Clouds - Source

Sandstorm — Sat, 18 Apr 2009 12:45:19 GMT

As I was studying your code, I found something that I would like to ask about:

in the function:

public virtual void LoadContent()

{

rnd = new Random((int)DateTime.Now.Ticks);

Thread.Sleep(15);

BuildCloud();

}

What is the Sleep(15) for?

Thanks!

re: Volumetric Clouds - Source

omar farhanah — Sat, 18 Apr 2009 12:23:10 GMT

How do I create clouds with rain, with thunder and lightning Lahud and storms

In the remote island

Volumetric Clouds

Game Development Blog — Thu, 16 Apr 2009 07:05:16 GMT

Volumetrische Wolken sehen fantastisch aus und verleihen einem Spiel das i-Tüpfelchen. Kommerzielle Titel wie Crysis machen von dieser Technik ebenfalls Gebrauch, um realistisch aussehende Wolken darzustellen und der Umgebungsbeleuchtung anzupassen. Nemo

Real-Time Rendering » Blog Archive » This and That

Real-Time Rendering » Blog Archive » This and That — Fri, 21 Nov 2008 03:54:57 GMT

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re: Volumetric Clouds - Source

Nemo Krad — Mon, 03 Nov 2008 10:17:42 GMT

sg, thanks for that :)

It was on my list of todo's (long list), it will be in the next cloud update.

re: Volumetric Clouds - Source

sg — Sun, 02 Nov 2008 07:13:02 GMT

:) No apologies necessary. It was great to see your method, and very helpful for learning.

I would like to point out, however, that you can GREATLY improve your efficiency by moving the GetTexture function the Vertex Shader.

With your current code, the GetTexture lookup is called from the Pixel Shader. round() is a very expensive operation, especially if you cover your entire viewport with a cloud billboard.. that is 1280 * 720 round operations! You can do the exact same calculation once per vertex of the billboard, then pass these texture coordinates directly to the pixel shader where they will be interpolated.

This also eliminates the need to pass the image # to the pixel shader.

re: Volumetric Clouds - Source

Nemo Krad — Wed, 29 Oct 2008 08:51:21 GMT

I guess I am out on my semantics.

To me at the time I considered it volumetric as the billboards/pointsprites sit within a volume (bounding box).

Sorry if this has mislead you into thinking it is something else.

re: Volumetric Clouds - Source

sg — Wed, 29 Oct 2008 05:04:03 GMT

I'm wondering why you refer to this method as "Volumetric"? While it does look nice, it is not a volumetric approach. It is only layered billboards with alpha transparency. If you place any object in the middle of the clouds, you will quickly see that it is not volumetric - the billboards will be clipped and the effect will be instantly lost.

re: Volumetric Clouds - Source

Michael Hansen — Wed, 08 Oct 2008 16:53:25 GMT

Nice verry nice

The source code of my engine will so be avelibe to you all

Volumetric Clouds - Source

GameDevKicks.com — Tue, 07 Oct 2008 17:52:10 GMT

You've been kicked (a good thing) - Trackback from GameDevKicks.com

re: Volumetric Clouds - Source

Astror Enales — Fri, 03 Oct 2008 23:05:12 GMT

Hello Nemo

thanks for this wonderfull eye candy.

it looks really cool and i really enjoyed to fly through the clouds myself, watching no video ;)

hope anyone will reward you for this in some way

go on with your work

Regards from Germany

re: Volumetric Clouds - Source

Lintford Pickle — Fri, 03 Oct 2008 19:13:16 GMT

This looks amazing, thanks for posting the source code. I too will be looking through it tomorrow :)