More improvement, just still some trouble with the crown cross on the king.
Parameters for MeshLab output were defaults. POV-Ray scene file uses:

All_Trace(My_Object,<-4,-0.1,-4>,<4,14,4>,0.1,0.5,0.05)

MeshLab procedure was simply (like Chris Young recommended):

Filters|Remeshing, Simplification and Reconstruction>Clustering decimation

Filters|Normals, Curvatures and Orientation>Compute normal for set points

Filters|Remeshing, Simplification and Reconstruction>Surface Reconstruction:
Ball Pivoting

Filters|Remeshing, Simplification and Reconstruction>Close Holes

Saved mesh as OBJ.

Opened into 3D Builder and they need a "repair", save again.

Opened into Poseray and export as POV-Ray files.

Rendered in POV-Ray and this is the end result (post-process combined individual
images).

I'm very hopeful now to get to be better quality somehow, I just haven't hit
upon the exact procedure or parameters yet.

Thanks again to Chris Young for making this possible!
Bob

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