handling reflections related to displacements is dealt with in the RayBias setting of the reflect node. The value is related to your unit-settings, default is 0.3" apparently.

BB and I had some discussion about this parameter, a few months ago. I couldn't trace it back for the moment. But raising / lowering might have some effect, it shifts an object towards the camera (?? if I recall correctly), then calculates reflections, etc.

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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