At the risk of oversimplifying this, here's a quick rundown.
Start with the lighting pass (or combine diffuse and shadow pass).
Invert AO and use as mask for a color correct. (or you can simply multiply
AO)
Add GI, Spec, Reflection, Refraction, Self Illumination.
Z-Depth, MV, P, coverage, Object ID, etc. are all utility passes, and don't
contribute to the Beauty.
If you use Raw passes, you need to multiply the filter pass with it's
corresponding raw pass. Then use normally.

Good luck,
Ryan





On Thu, Jun 2, 2011 at 3:03 PM, Ron Ganbar <[email protected]> wrote:

> ***Shameless plug***
> You can also try a little book I wrote called Nuke 
> 101<http://www.peachpit.com/store/product.aspx?isbn=0321733479>.
> Chapter 4 is all about multi pass compositing.
>
>
> Ron Ganbar
> email: [email protected]
> tel: +44 (0)7968 007 309 [UK]
>      +972 (0)54 255 9765 [Israel]
> url: http://ronganbar.wordpress.com/
>
>
>
> On 2 June 2011 17:21, Randy Little <[email protected]> wrote:
>
>> The nuke tutorials have this.
>>
>> Randy S. Little
>> http://www.rslittle.com <http://reel.rslittle.com>
>>
>>
>>
>>
>> On Thu, Jun 2, 2011 at 05:22, Mahesh Kumar 
>> <[email protected]>wrote:
>>
>>>  Hi all,
>>>
>>> give me some examples for basic multipass compositing in Nuke and how to
>>> blend the layers.
>>>
>>> thanks in advance
>>> mahesh
>>>
>>> _______________________________________________
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>>
>>
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>
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