<s>
Freestyle	B-Language
is	O
a	O
free	B-Application
,	O
open	B-Application
source	I-Application
renderer	O
for	O
non-photorealistic	O
line	O
drawing	O
from	O
3D	O
scenes	O
.	O
</s>
<s>
The	O
program	O
uses	O
a	O
shader	O
script	O
model	O
inspired	O
by	O
the	O
RenderMan	B-Application
Shading	I-Application
Language	I-Application
,	O
allowing	O
different	O
shading	O
styles	O
to	O
be	O
written	O
as	O
a	O
script	O
that	O
's	O
interpreted	O
at	O
the	O
render	O
time	O
.	O
</s>
<s>
The	O
different	O
rendering	O
styles	O
are	O
based	O
on	O
"	O
style	O
modules	O
"	O
that	O
are	O
written	O
in	O
Python	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
The	O
stand-alone	O
program	O
,	O
which	O
uses	O
OpenGL	B-Application
and	O
the	O
Qt	B-Language
widget	B-Library
toolkit	I-Library
,	O
can	O
render	O
images	O
based	O
on	O
.3ds	O
files	O
.	O
</s>
<s>
The	O
stand-alone	O
version	O
of	O
Freestyle	B-Language
is	O
not	O
under	O
active	O
development	O
anymore	O
,	O
since	O
2008	O
.	O
</s>
<s>
Freestyle	B-Language
is	O
integrated	O
with	O
Blender	B-Application
as	O
of	O
version	O
2.67	O
.	O
</s>
<s>
The	O
Freestyle	B-Language
version	O
integrated	O
with	O
Blender	B-Application
is	O
under	O
active	O
development	O
.	O
</s>
