Comping Gi

[user_deleted]

Hi everyone,

I'm not a newbie when it comes to shake, but have little experience comping multilayer CG stuff at this stage, and am currently learning a bit more down that path to cater for some upcoming work.

Could someone point me in the right direction of "the" effective way of adding a Global Illumination pass to a CG scene? I've got ambient occlusion and specular working very nicely in the current project, and though I've got the seperate GI pass looking ok in the scene i'm working on, I've really only been guessing up til now, and would rather it working 'correct' than simply 'looks ok enough'...

Any assistance?

thanks,
frd

[deke-kincaid]

http://www.highend3d.com/shake/tutorials/general/8.html
http://www.highend3d.com/shake/tutorials/general/130.html

[user_deleted]

Thanks, but neither of those tutorials answered my question, and I would not have asked the question without scoured the available tutorials including those...

Perhaps I've expressed myself too ambiguously - how about this:

You can generally apply an Ambient Occlusion pass to a scene using the imult node.
You can generally apply a Global Illumination pass to a scene using the _____ node.

I can add in the GI pass in many different ways, and most look and work fine, but I would prefer to know which is "The Way" so that the lighting is actually being applied the way it was intended...

Further assistance?

frd

[user_deleted]

I think you should use your GI pass as the base of your comp. That is, layer all other passes on top, like shadow, specular, occlusion, reflection. And remember: What looks right, by definition, IS right. (Golden rule of compositing)

[joojaa]

your free to do whatever looks good.

QUOTE(frd @ 05/22/06, 04:26 AM) [snapback]237832[/snapback]
You can generally apply an Ambient Occlusion pass to a scene using the imult node.

Yes and no. Depends on how you construct your scene. uiin general terms no.

if you start with the diffuiuse color and them mult with occlusion fine! And then add all additional light on top of that.

Hioever note occlusion is just something that describes how the abient light is distruibuting better than one constant color. So in general the occluison should be added to your object. Offcourse itll need to be tinted the way each surface acts on it but.

QUOTE
You can generally apply a Global Illumination pass to a scene using the _____ node.

Again read the one befre it depens on how you order your network. Theres no general rule to how you do a effect juts how things relate to achother and general ideas.