I know, I know... LM "hates" this kind of effects and he'd wish it NEVER would be created (jaja) ...Well! Luckly they still are there (still) and I think that adding this Contraction option to Shaded Shape Effects in the same way as Layer Shade Effect works it'd be possible save a lot of time and (the more important thing) reduce "COMPLEXITY" in the construction of characters and backgrounds...
PD: ...a "Shadow On" or Drop Shadow Effect for shapes it'd be very USEFUL to for this simplification pourposes ...CIAO!
EY! If somebody was interested, I have obtained actually the "desired" results (well, more or less...) combining this two Shape effects "Halo & Shaded", a little more complicated working with outlines cause you must apply a Style to can mix more than only one Effect in the same outline (you know, only one effect per line limitation ) and maybe not 100% accurate in all cases, but possible at least ...CIAO!