smoothing.
It's a while that I don't convert and test so I still have to use the lastest version of both pcs and fso, then I don't know if it has been already fixed. In case, excuse me
here's the prob:
when you use autofacet and spec is enabled in fso, the edges of the polys are somewhat highlighted, the result is weird whenever you have rounded surfaces.
The problem doesn't seem to happen without spec (so I don't know if it is related to fso and not to pcs)
The problem doesn't happen if you use cob2fs2 and smoothing (full smoothing)
IIRC the problem, as reported by omniscaper when he converted the galaxy, doesn't happen with styxx's plugin
as said, I don't know if it is related to fso or pcs, but whatever is the cause, it doesn't happen with full smoothing and cob2fs2, so imho you should at least enable smoothing to the avaiable shaders