In my opinion sharp edges never ever look right in Poser... also Poser has trouble rendering them as well as having trouble rendering planes that meet in welded edges. Just today I bought an expensive product in the RMP that has welded edges on the rectilinear forms (broken tiles) that cause the planes to be shaded in the inverse by Poser. Maybe I should ask for a refund. When making things I try to chamfer the edges no matter how sharp an edge they belong to to like a sword blade so that the flat planes will be shaded correctly by Poser. It is sometimes good to add polys even on those planes without detail so the Poser will render them right.