I just merged the two halves of my character and once again noticed that the texture coordinates and materials were split on two clusters. While this might sound like a good idea, each cluster includes all samples, but only half of them are actually positioned in UV space, making one half always render badly.
I worked around by copying and pasting the UVs of the one cluster to the other, but I wonder if there is an easier way. Like removing the non-cluster-points from the projection.
I just would like to know, as I am thinking of using material-clusters pretty heavily on my next character...making it up from loads of poly-patches.