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Computer Generated Images Combining 3D models with photos, or crafting fully synthetic images using CGI or fractals

CGI Retouching - How to do!?

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  #1  
Old 06-10-2012, 02:12 PM
rl-retouch rl-retouch is offline
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CGI Retouching - How to do!?

Hey All

I've been retouching for a while now, but im increasingly intrigued by images like this...

http://www.cgi-studio.pro/index.php/.../aqua-dress-2/

The info with the image says they used luxology modo with photoshop, I've found a open-source (free!) cgi software (blender) but have no idea how this type of image may be created.

Does anyone have any idea how this is done? Or could someone point me to some tutorials that show 1) how to model liquids like this, and 2) how to work with the cgi model in photoshop.

Also do the 2 separate images, the model and the water need to be composited in the cgi program to get the right effect?

As I said im completely new to this, but there are great creative possibilities that I want to try out.

If anyone has experience with this, let mw know.
Thanks.
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Old 06-10-2012, 02:25 PM
creativeretouch creativeretouch is offline
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Re: CGI Retouching - How to do!?

Hi, this effect is usually achieved with http://www.realflow.com software.

Blender is great and I would suggest to start here if you wish to learn CGI.

Good tutorials can be found here:

http://www.blenderguru.com
http://cgcookie.com/blender
http://gryllus.net/Blender/3D.html

Have a fun

Regards, Filip

-------------------------------------------------------
http://shotworldwide.com & http://photoapps.info
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Old 06-10-2012, 02:42 PM
kav kav is offline
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Re: CGI Retouching - How to do!?

It looks like the dress was sculpted to a degree and possibly driven by dynamic cloth simulations with the splashes being made separately. It looks like liquid due to shaders with exported alphas for compositing. If you don't know how to model in 3d, start there. This is not a good first project. You have to be able to model the dress in a way that makes sense including some of the wrinkles and displacement although you might be able to simulate some of that via dynamics. You'll need to learn to tweak shaders for it. You'll either have to comp real splashes or figure out how to model those too. They can be simulated to a degree assuming blender has a dynamics system or plugin available. I'd look at something like sculptris too for some of the detailing.

Take a look at the clay render to see what I mean when I say that the main part of the dress wasn't necessarily created by fluid simulation on the modeling end. Obviously you can tweak materials however you want. I could write about this for a very long time, but you should consider learning the programs and getting to a point where you feel comfortable modeling in a perspective view rather than just front/side/top before you try this.


Quote:
Originally Posted by creativeretouch View Post
Hi, this effect is usually achieved with http://www.realflow.com software.

Blender is great and I would suggest to start here if you wish to learn CGI.
Do not make it needlessly complex for the guy. Realflow is overkill for that. As I said most of the effect appears to be shader driven with the splashes being potentially the only true fluid simulation in the thing. I've seen others use realflow. It does have a nice container system, but this has very little turbulence in most of those areas. If you cover up the splashes when you view it, you'll see what I mean.
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Old 06-10-2012, 03:11 PM
rl-retouch rl-retouch is offline
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Re: CGI Retouching - How to do!?

Thanks for info and links. Looking at the modo website they have a splash kit add on, looks like that takes a lot of the hard work away. There may be some plugin for blender but i havent dug too deep yet to find them, I think I'll set aside a few hours a week to learn this stuff.
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Old 06-10-2012, 03:29 PM
creativeretouch creativeretouch is offline
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Re: CGI Retouching - How to do!?

Quote:
Originally Posted by rl-retouch View Post
I think I'll set aside a few hours a week to learn this stuff.
yes, for years and when you will be ready with this image you can try create something like this:

http://www.youtube.com/watch?v=_sjPNn3uECk

If you would like to learn CGI I would suggest to start with simple modelling, texturing and rendering. No one is able to learn this stuff properly in one month.

Regards, Filip

-------------------------------------------------------
http://shotworldwide.com & http://photoapps.info
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Old 06-10-2012, 03:39 PM
creativeretouch creativeretouch is offline
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Re: CGI Retouching - How to do!?

Quote:
Originally Posted by kav View Post
Do not make it needlessly complex for the guy. Realflow is overkill for that. As I said most of the effect appears to be shader driven with the splashes being potentially the only true fluid simulation in the thing. I've seen others use realflow. It does have a nice container system, but this has very little turbulence in most of those areas. If you cover up the splashes when you view it, you'll see what I mean.
I agree with you, just wanted to show him Realflow

Regards, Filip

-------------------------------------------------------
http://shotworldwide.com & http://photoapps.info
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Old 06-10-2012, 04:37 PM
kav kav is offline
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Re: CGI Retouching - How to do!?

Quote:
Originally Posted by creativeretouch View Post
I agree with you, just wanted to show him Realflow

Regards, Filip

-------------------------------------------------------
http://shotworldwide.com & http://photoapps.info
That makes sense then. It's a pretty specialized program. I mean if you've got a ton of work doing complex splashes, that's a totally different thing. Otherwise dropping $4k or so just to do liquids is likely to be too expensive. It's possible to get good results via much less expensive plugins for whatever 3d package especially if you're just doing stills. I'm not sure if the OP understands that the dress may not have been built as a liquid at all but merely shaded that way.
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Old 06-11-2012, 03:04 AM
creativeretouch creativeretouch is offline
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Re: CGI Retouching - How to do!?

Quote:
Originally Posted by kav View Post
That makes sense then. It's a pretty specialized program. I mean if you've got a ton of work doing complex splashes, that's a totally different thing. Otherwise dropping $4k or so just to do liquids is likely to be too expensive. It's possible to get good results via much less expensive plugins for whatever 3d package especially if you're just doing stills. I'm not sure if the OP understands that the dress may not have been built as a liquid at all but merely shaded that way.
That's the reason why I mentioned those Blender tutorials. He needs to understand how to build a basic scene and then continue. We should be aware of all possible tools and choose the right one for our job.

Regards, Filip

-------------------------------------------------------
http://shotworldwide.com & http://photoapps.info

Last edited by creativeretouch; 06-11-2012 at 03:33 AM.
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  #9  
Old 06-11-2012, 07:44 AM
rl-retouch rl-retouch is offline
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Re: CGI Retouching - How to do!?

Impressive ad, I'd be more than happy to create just one of those frames!
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Old 06-11-2012, 07:53 AM
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Vernon Vernon is offline
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Re: CGI Retouching - How to do!?

CGI is not the end all approach to "liquid" attire.

This photographer does some amazing things with milk. It's all compositing, no CGI involved. And he does offer flash-based "magazines" that go over the project which could provide you insights on his techniques, assuming you know Russian, or can have someone translate this for you.

Link (**nudity**) http://razooma.net/projects/milk/
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