Real

Started by rcallicotte, February 03, 2009, 11:01:40 pm

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rcallicotte

February 05, 2009, 07:33:09 am #15 Last Edit: February 05, 2009, 09:38:10 am by calico
I agree.  Saurav's lighting looks very close to the photo...very close to real lighting inside the cloud.  This is a critical component and maybe we do need a different set of parameters or different levels or something in TG2 to get to this point more quickly.

[Edit - I tried using Luc's cloud file with a modified Frank's atmosphere and it looked pretty good, but I wanted to try something else by mixing more of the two together.  Frank's lighting is very good and I'm trying to move the winning parts of it into Luc's use of the Density Fractal.]
So this is Disney World.  Can we live here?

Saurav

Here is the larger render. 1920 x 1080.

I think it took approx 6 hours render time.

Exported as EXR and tonemapped in Photomatix.

If any one is interested the clip file is attached to this post.

buzzzzz1

Thanks! I'll have too study these.  :)
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darthvader

Thanks a million Saurav!

sjefen

Quote from: Tangled-Universe on February 05, 2009, 01:55:19 am
Quote from: sjefen on February 04, 2009, 11:45:01 pm
The biggest problem with getting those clouds calico posted is the shadow area.

I can make a cloud and make the whole thing look really good except in the shadow area's and this really ruin's it all.
There are some options that I feel are missing in the cloud shader parameters. We have "fake internal scattering", but I think there should be something more here. Something to control the shadow area's. And why is it called "fake"? Where is the "true internal scattering" option? Maybe that's the option I'm looking for :)

Maybe there is a way, but I have not figured it out and I have tried so many different things now I don't think it's possible without any new features.
I really hope there will be some more options in the cloud shader parameters. I really do.
Please add something more for us Matt :'(

- Terje


You can fiddle and improve the shadowy areas a lot using the fake ambient color settings :)


Yes you can. But you won't get rid of those edges in the shadow area. You can see those very clearly in Saurav's image. I want to get rid of those details in the shadows almost completly like in the clouds calico posted.

It's a little hard to explain, but look in the shadow area's in the images below:

http://www.maltaweather.info/05_cunim_city.jpg
http://www.weatherfiles.com/wp-content/thunderstorm.jpg
http://www.natures-desktop.com/images/wallpapers/1280x1024/clouds/clouds-cumulus-layers.jpg

- Terje
Don't put faith in bullshit!

rcallicotte

So this is Disney World.  Can we live here?

Saurav

Quote from: sjefen on February 05, 2009, 09:11:22 pm
Quote from: Tangled-Universe on February 05, 2009, 01:55:19 am
Quote from: sjefen on February 04, 2009, 11:45:01 pm
The biggest problem with getting those clouds calico posted is the shadow area.

I can make a cloud and make the whole thing look really good except in the shadow area's and this really ruin's it all.
There are some options that I feel are missing in the cloud shader parameters. We have "fake internal scattering", but I think there should be something more here. Something to control the shadow area's. And why is it called "fake"? Where is the "true internal scattering" option? Maybe that's the option I'm looking for :)

Maybe there is a way, but I have not figured it out and I have tried so many different things now I don't think it's possible without any new features.
I really hope there will be some more options in the cloud shader parameters. I really do.
Please add something more for us Matt :'(

- Terje


You can fiddle and improve the shadowy areas a lot using the fake ambient color settings :)


Yes you can. But you won't get rid of those edges in the shadow area. You can see those very clearly in Saurav's image. I want to get rid of those details in the shadows almost completly like in the clouds calico posted.

It's a little hard to explain, but look in the shadow area's in the images below:

http://www.maltaweather.info/05_cunim_city.jpg
http://www.weatherfiles.com/wp-content/thunderstorm.jpg
http://www.natures-desktop.com/images/wallpapers/1280x1024/clouds/clouds-cumulus-layers.jpg

- Terje


This is essentially what I was saying a few posts back. Until there is a way we can avoid those ugly shapes in the shadow areas (fake internal scattering) these types of clouds are going to be very hard to mimic in TG2. But in the meantime this shouldn't stop others trying to have a go at creating them, there might be other ways around this problem. ;D

Tangled-Universe

You can get rid of those ugly detailed shadows with the fake ambient settings, I'm convinced about that.
Like everything with clouds it is a combination of factors. In this case the propagation, mix and fake internal scattering settings are also involved. With the fake ambient lighting you can "over-rule" the lighting in the detailed shadow areas.

Martin

j meyer

sjefen - i know it's a shameless plug,but maybe you've missed
            these  http://forums.planetside.co.uk/index.php?topic=4863.0

Tangled-Universe

J Meyer: those look nice indeed!
There's barely something I miss here but I did miss this topic.

sjefen

Quote from: j meyer on February 06, 2009, 10:32:05 am
sjefen - i know it's a shameless plug,but maybe you've missed
            these  http://forums.planetside.co.uk/index.php?topic=4863.0


Those are amazing. You obviously have what I want.
May I ask how you did it? :)

- Terje
Don't put faith in bullshit!

rcallicotte

...and how do we do that without the blue tint?
So this is Disney World.  Can we live here?

moodflow

At this point in time, and in the current state of affairs... I have to say this is the most realistic cumulus cloud I've seen yet in CG!   8)

Amazing work Saurav!  And many thanks for sharing the clip. 
http://www.moodflow.com
mood-inspiring images and music

j meyer

sjefen - keep fake internal scattering close to or at zero and play with
            all enviro light settings.

calico - just use another color instead ;)

If there is interest i can post one of the example tgds later.

efflux

For a moment there I thought this was TG2 and was going to say awesome but the fact that I even thought it was TG2 for a second means TG2 is pretty good.

I'm as bit limited with computer power so I have never got into cumulus clouds like this. What I notice is that cumulus clouds in TG2 don't look like light is traveling through them and glowing back out. It looks more like a surface lit thing. How to improve that I don't know. Haven't experimented much with cumulus clouds but this is a perfect reference photo to compare against.