If you don't know what IDL is, then you didn't turn it on, so ignore the comment about GI. GI is Global Illumination. Poser 8 has one of hundreds of approaches to GI, which is IDL. Many methods of GI produce variability that isn't real and this is apparent in animations. Adom thought you were running into this.

So you changed to raytraced shadows - did that fix it or not. If not you must show us what the symptom is, not with words, but with pictures.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)