<s>
Depth	B-General_Concept
peeling	I-General_Concept
is	O
a	O
method	O
of	O
order-independent	O
transparency	O
.	O
</s>
<s>
Depth	B-General_Concept
peeling	I-General_Concept
has	O
the	O
advantage	O
of	O
being	O
able	O
to	O
generate	O
correct	O
results	O
even	O
for	O
complex	O
images	O
containing	O
intersecting	O
transparent	O
objects	O
.	O
</s>
<s>
Depth	B-General_Concept
peeling	I-General_Concept
works	O
by	O
rendering	O
the	O
image	O
multiple	O
times	O
.	O
</s>
<s>
Depth	B-General_Concept
peeling	I-General_Concept
uses	O
two	O
Z	O
buffers	O
,	O
one	O
that	O
works	O
conventionally	O
,	O
and	O
one	O
that	O
is	O
not	O
modified	O
,	O
and	O
sets	O
the	O
minimum	O
distance	O
at	O
which	O
a	O
fragment	O
can	O
be	O
drawn	O
without	O
being	O
discarded	O
.	O
</s>
