Yet another approach with some trigo

Assume imposter in the middle. Largest distortion probably at front side.
dobj is to front side of object, as usual.

[Graphics:../Images/impdist_gr_58.gif]
[Graphics:../Images/impdist_gr_59.gif]

[Graphics:../Images/impdist_gr_60.gif]

[Graphics:../Images/impdist_gr_61.gif]


Converted by Mathematica      February 7, 2002