light problem with white fur.

#1

its maya 2011
shave and haircut
mental ray
so i did some work on fur and it looks fine for me but when i put some spot light on it it gets bad.
here is without spotlight

and this one is with 3 spotlight

spot light setting is just a

  1. depth map shadow
  2. in mental ray shadow section "use mental ray shadow map overrides
  3. shave shadows “resolution 1500 and fuzz 30”
    plz help me out with this. it took almost 3months and still didn’t finished.
#2

after i sample up to 4 and softness to 0.1 it look like this

looks like dark shades are gone but it still not looks so good and the render time is high.
7min to 31min.
any advice

#3

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