b
r
i
g
h
t
n
e
s
s
1
s
a
t
u
r
a
t
i
o
n
0
.
8
h
u
e
1
o
p
a
c
i
t
y
0
.
7
c
u
r
v
a
t
u
r
e
s
u
r
f
a
c
e
1
s
u
r
f
a
c
e
2