<s>
Source	B-Language
Filmmaker	I-Language
(	O
often	O
abbreviated	O
as	O
SFM	B-Language
)	O
is	O
a	O
3D	O
computer	O
graphics	O
software	O
toolset	O
published	O
by	O
Valve	O
for	O
creating	O
animated	O
films	O
,	O
which	O
utilizes	O
the	O
Source	B-Application
game	I-Application
engine	I-Application
.	O
</s>
<s>
Source	B-Language
Filmmaker	I-Language
has	O
been	O
used	O
to	O
create	O
many	O
community-based	O
animated	O
shorts	O
for	O
popular	O
Source	O
games	O
,	O
including	O
Team	B-Application
Fortress	I-Application
2	I-Application
,	O
the	O
Left	O
4	O
Dead	O
series	O
,	O
and	O
Half-Life	B-Application
2	I-Application
.	O
</s>
<s>
On	O
June	O
27	O
,	O
2012	O
,	O
Valve	O
released	O
a	O
free	O
,	O
open	O
beta	O
version	O
of	O
SFM	B-Language
via	O
Steam	B-Application
.	O
</s>
<s>
Source	B-Language
Filmmaker	I-Language
is	O
a	O
tool	O
for	O
animating	O
,	O
editing	O
,	O
and	O
rendering	O
3D	O
animated	O
videos	O
using	O
assets	O
from	O
different	O
games	O
which	O
use	O
the	O
Source	B-Application
engine	I-Application
,	O
including	O
sounds	O
,	O
models	O
,	O
and	O
backdrops	O
.	O
</s>
<s>
SFM	B-Language
also	O
allows	O
for	O
the	O
creation	O
of	O
still	O
images	O
,	O
art	O
,	O
and	O
posters	O
.	O
</s>
<s>
SFM	B-Language
includes	O
three	O
different	O
user	O
interfaces	O
and	O
a	O
"	O
work	O
camera	O
"	O
for	O
previewing	O
an	O
active	O
scene	O
.	O
</s>
<s>
Users	O
can	O
either	O
create	O
new	O
projects	O
or	O
import	O
data	O
from	O
Source-based	O
games	O
to	O
extend	O
their	O
SFM	B-Language
animations	O
.	O
</s>
<s>
SFM	B-Language
also	O
supports	O
several	O
cinematographic	O
effects	O
and	O
techniques	O
such	O
as	O
motion	O
blur	O
,	O
Tyndall	O
effects	O
,	O
dynamic	O
lighting	O
,	O
and	O
depth	O
of	O
field	O
.	O
</s>
<s>
Users	O
can	O
also	O
rig	O
3D	O
characters	O
and	O
can	O
use	O
inverse	B-General_Concept
kinematics	I-General_Concept
to	O
manually	O
animate	O
movements	O
that	O
do	O
not	O
already	O
exist	O
in	O
the	O
games	O
they	O
imported	O
assets	O
from	O
.	O
</s>
<s>
SFM	B-Language
was	O
developed	O
internally	O
at	O
Valve	O
in	O
2005	O
and	O
forked	O
from	O
the	O
in-game	O
demo	O
playback	O
tool	O
found	O
in	O
Source	O
.	O
</s>
<s>
SFM	B-Language
was	O
successfully	O
used	O
to	O
make	O
Day	B-Application
of	I-Application
Defeat	I-Application
:	I-Application
Source	I-Application
trailers	O
with	O
experimental	O
effects	O
that	O
could	O
not	O
be	O
achieved	O
in	O
real-time	O
.	O
</s>
<s>
The	O
tool	O
was	O
used	O
extensively	O
for	O
certain	O
promotional	O
materials	O
for	O
the	O
release	O
of	O
Team	B-Application
Fortress	I-Application
2	I-Application
,	O
particularly	O
the	O
Meet	O
the	O
Team	O
featurettes	O
.	O
</s>
<s>
This	O
version	O
of	O
SFM	B-Language
,	O
which	O
ran	O
using	O
Source	O
's	O
in-game	O
tools	O
framework	O
,	O
was	O
unintentionally	O
leaked	O
during	O
the	O
public	O
beta	O
of	O
Team	B-Application
Fortress	I-Application
2	I-Application
in	O
September	O
2007	O
.	O
</s>
<s>
By	O
2010	O
,	O
the	O
entire	O
interface	O
was	O
re-implemented	O
using	O
Qt	B-Language
4	I-Language
and	O
given	O
its	O
engine	O
branch	O
for	O
further	O
development	O
.	O
</s>
<s>
Before	O
SFM	B-Language
was	O
released	O
to	O
the	O
public	O
,	O
Team	B-Application
Fortress	I-Application
2	I-Application
carried	O
a	O
simplified	O
version	O
of	O
SFM	B-Language
known	O
as	O
the	O
"	O
Replay	O
Editor	O
"	O
which	O
was	O
limited	O
to	O
capturing	O
the	O
actual	O
events	O
occurring	O
throughout	O
a	O
player	O
's	O
life	O
.	O
</s>
<s>
The	O
Replay	O
Editor	O
also	O
allowed	O
users	O
to	O
upload	O
completed	O
videos	O
to	O
YouTube	B-General_Concept
.	I-General_Concept
</s>
<s>
On	O
June	O
27	O
,	O
2012	O
,	O
SFM	B-Language
became	O
available	O
on	O
a	O
limited	O
basis	O
through	O
Steam	B-Application
,	O
the	O
same	O
day	O
the	O
final	O
Meet	O
the	O
Team	O
video	O
"	O
Meet	O
the	O
Pyro	O
"	O
was	O
released	O
.	O
</s>
<s>
On	O
April	O
1	O
,	O
2013	O
,	O
Valve	O
implemented	O
support	O
for	O
the	O
Steam	B-Application
Workshop	O
,	O
which	O
allows	O
users	O
to	O
upload	O
their	O
custom-made	O
assets	O
onto	O
the	O
Steam	B-Application
community	O
.	O
</s>
<s>
A	O
version	O
of	O
SFM	B-Language
for	O
Valve	O
's	O
Source	B-Operating_System
2	I-Operating_System
engine	O
was	O
released	O
on	O
May	O
15	O
,	O
2020	O
,	O
alongside	O
other	O
development	O
tools	O
for	O
Half-Life	B-Application
:	I-Application
Alyx	I-Application
.	O
</s>
