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Using dirt mask or occlusion to drive displacement hangs rendering

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Is it possible to use Dirt Mask or Occlusion nodes in SHOP to control displacement strength? (the attached image shows the effect of Dirt Mask)

When I try to use any of them to reduce displacement strength on object's edges, Mantra calculates displaced geometry forever. Rendering never starts.


Maybe an infinite loop is created that way? Or, ray-sampling-based nodes can't be used for displacement because it's done before the actual rendering?





Edited by OskarSwierad

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Have the same problem here...Dirt Mask is hanging mantra infinitely. I'm just trying to mask a noise with a dirt mask and and plug it to displacement...and crap! noise only works fine but as soon as the dirt mask is there it jams.

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