Ohji Nakagami authored Apr 13, 2018 and David Flynn committed May 11, 2018

This commit eliminates the blending of point attribute values during
the attribute transfer process used in geometry quantisation by forcing
the blending weight to be 0|1 (m42141).

m42538 also recommends to disable the bounded search of the closest
attribute from the contributing set by setting searchRange=0.  This is
reflected by a change to the software defaults and configuration.