DeepHoldoutSmoother [NKPD]
Author: Denis Scolan + Jesús Diez-Pérez
Smoothing the harsh holdout intersection that occurs when the holdout itself doesn't have enough samples (coming from a standard Z pass for instance).
The D_DeepHoldoutSmoother is meant to be inserted in your tree on the holdout stream and before the DeepHoldout/DeepMerge(holdout mode) node.
Keep in mind that the holdout will expand slightly and also the more you increase the samples the heavier your comp will get. Thank you to Jesús Diez-Pérez for the Python script.