cspear's data were calculated in the absence of SSS.  the SSS precalc step is greatly increased if IDL precalc is not used, however the SSS variables may not be user-accessible such that the SSS precalc step can be skipped or decreased.  users trying SSS/IDL may find a geometric increase in render time (IDL precalc + SSS precalc + render), e.g. going from IDL IC = 50 to IDL IC = 90 may take twice as long, 90 to 95 = 2x render time, ... , 99 - 100 = 2x.

AFAICT d3d's RenderFF script calculates render time as SSS precalc + render, but doesn't include IDL precalc.

in the case of gold looking too yellow, reduce the diffuse value (if any) to ~ 0.001 and reduce saturation of reflection colour.