@timoteo1 I'm not really sure what you're referring to, but my PoserPro Ref manual in the IDL section (ch 19 pg 401) says:

Animation Considerations: When rendering out an animation while using IDL, make sure that multi-threaded rendering is not being used (set Number of Threads to 1 in the Render tab of the General Preferences dialog). If you leave the setting at 2 or higher, your renders will come out jittery, as the shadows and lighting will not line up from frame to frame.

Perhaps that can be of help.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though