A little while back, I prepared these guides for Cityscape - they've given me permission to publish them here

They're not exrTrader specific but should serve as a good introduction into working with passes in LightWave and Photoshop - I have an exrTrader tutorial coming but it's taken longer than I would have liked to get finished - watch this space!

http://www.survivorsdiary.com/Passes/passes.html

http://www.survivorsdiary.com/Passes/advpasses.html

http://www.survivorsdiary.com/Passes/layers.html

The links at the top don't work 'cause this is only part of Cityscape's workflow docs and I don't really have time to fix it up - I hope somebody finds them of use...

Oh, and !WARNING! compositor hate ahead!!
Obviously, my opinions do not reflect those of my employer...