@ Blackheart, you are free to disagree.

Internally, as from SR 2 or 3, I do not know exactly any more, Poser just ignores AO settings as soon as IDL is vinked On in renders settings.
So put AO where ever you want :-)

But?
I agree... If you know what you are doing, you can use AO in NON IDL renders.
But I prefer IDL, and then work with the light shadow settings to finetune.
Using both, AO and IDL, can lead to lots of gueswork and frustration. 

Correct Ladonna:
Removing the texture filter Quality to none is also an improvement.
Untill you have Poser9 or PP2012 where you can put Texture filtering to Crisp.

@Honey.ZA
U sure you have the latest SR's installed??

You never mentioned what Poser version you are using.
I guessed Poser8

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!