AO because it's faster and I think it gives a more neutral result, it most cases (try the settings in the tut with full radiosity and see the difference)
Everytime I use full radiosity in similar scenes, I get an overly warm yellowish cast, so I tend to use it only on close up and single oblect work.
Re the x1 thing:- ( from the help files)
oversampling pass1: Oversampling rate for the first rendering pass. 1x results in no anti-aliasing, whilst 64x gives very smooth results, but will take much longer to compute. An oversampling rate of 1x should be enough for most scenes. To improve image quality it is better in increase the oversampling rate of the second pass because the second pass antialiases adaptively which is much faster.
oversampling pass 2: Oversampling rate for the second rendering pass. The second rendering pass just improves those areas of the image were a refinement is needed. See also the tolerance parameter. If you need a higher image quality increase this parameter
It's just the settings I chose for that particular render
Thanks for the tutorial luke:icon_thumbup:. Great cat thing IDR, it looks very Egyptian-ish. Any tips on how you made it? Or is it just the old polygon modeling technique The silver surfers pet:tongue:.