Can someone explain this paragraph from here http://www.punkuser.net/lvsm/lvsm_web.pdf ( 7 Other Warps)
“For instance, it is interesting to consider the exponential warping function e^(cx) (where c is a constant) as suggested by [11], but still using a second moment and Chebyshev’s Inequality. This warping has the effect of relatively moving object B toward object A which reduces the above ratio. The resulting exponential variance shadow map (EVSM) has greatly reduced VSM-like light bleeding while still avoiding any bleeding near occluders.”
I can see why the ratio reduces using exponentials, but I don't …