Interesting tutorial about "Ambient Occlusion with Alpha"

[Titus]

i found good tutorial about ambient occlusion with alpha on 3dtotal.com.
Here the link 'Tutorial on Ambient Occlusion with Alpha'
by Charanjeev Sawhney

it very helpful tutorial )))

[Talon]

I'm not sure I see the benefits.

The AO there isn't taking into account the alpha channel when calculating the AO, it's just letting the camera see through the polys to the AO on the other side.