Quote - Actually it isn't the cyclorama, but the AO which comes with IBL (IMHO). When using AO you get the same problem with any objects having big flat surfaces (though I have to admit I newer saw it that strong!..) For instance I get it all the time on Stonemason's sceneries. Poser bug.

To fix it, raise the Shadow Biais, and check by making local renders on the problems zone(s) till the problem dissapears. AO will look a little less good, but short of rendering 2 versions and patching problem zones in Postwork there is no know (to me) solution.

Its not a bug.  The same effect exists in most applications (including high end) when working at the same scale. Not a bug, a function of scale and execution.

That's how it works (as a function of AO).  If the scale were greater the effect would diminish to some extent, and then the shadow bias (which is there to affect how shadows, inclusive of AO operate) is used to tune it.

 

thou and I, my friend, can, in the most flunkey world, make, each of us, one non-flunkey, one hero, if we like: that will be two heroes to begin with. (Carlyle)