<s>
Filter	B-Operating_System
Forge	I-Operating_System
is	O
a	O
computer	O
graphics	O
program	O
for	O
Windows	O
and	O
Mac	O
that	O
allows	O
users	O
to	O
create	O
procedural	O
textures	O
and	O
modify	O
images	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
as	O
a	O
standalone	B-Operating_System
application	I-Operating_System
or	O
as	O
a	O
plugin	B-Operating_System
for	O
compatible	O
8bf	O
hosts	O
such	O
as	O
Adobe	B-Operating_System
Photoshop	I-Operating_System
,	O
Affinity	B-Operating_System
Photo	I-Operating_System
,	O
Corel	B-Application
PaintShop	I-Application
Pro	I-Application
.	O
</s>
<s>
It	O
has	O
been	O
under	O
continuous	O
development	O
by	O
Filter	B-Operating_System
Forge	I-Operating_System
OÜ	O
(	O
formerly	O
Filter	B-Operating_System
Forge	I-Operating_System
,	O
Inc	O
)	O
since	O
its	O
official	O
release	O
in	O
March	O
2007	O
.	O
</s>
<s>
Filter	B-Operating_System
Forge	I-Operating_System
renders	O
images	O
based	O
on	O
input	O
images	O
and	O
XML	B-Protocol
documents	I-Protocol
called	O
"	O
filters	O
"	O
.	O
</s>
<s>
Types	O
of	O
generations	O
include	O
single	O
colors	O
,	O
polygons	O
,	O
gradients	O
,	O
Perlin	O
noise	O
,	O
variations	O
of	O
Worley	B-Algorithm
noise	I-Algorithm
,	O
and	O
patterns	O
commonly	O
found	O
in	O
masonry	O
.	O
</s>
<s>
Types	O
of	O
transformations	O
include	O
rotation	O
,	O
scaling	O
,	O
refraction	O
,	O
noise	O
distortion	O
,	O
kaleidoscope	O
patterns	O
,	O
blurs	O
,	O
edge	O
detection	O
,	O
blending	O
,	O
a	O
variety	O
of	O
color	B-Algorithm
space	I-Algorithm
manipulations	O
,	O
and	O
switches	O
.	O
</s>
<s>
As	O
of	O
version	O
4.0xx	O
,	O
the	O
program	O
also	O
implements	O
floating	B-Algorithm
point	I-Algorithm
processing	O
,	O
particle	O
arrays	O
,	O
recursive	O
loops	O
,	O
bézier	O
curves	O
,	O
and	O
built-in	O
Lua	B-Language
scripting	I-Language
.	O
</s>
<s>
Filter	B-Operating_System
Forge	I-Operating_System
also	O
includes	O
rendering	O
options	O
such	O
as	O
anti-aliasing	B-Algorithm
,	O
bump	O
maps	O
and	O
normal	O
maps	O
,	O
environment	O
mapping	O
,	O
ambient	O
occlusion	O
,	O
seamless	O
tiling	O
,	O
and	O
a	O
text-based	O
batch	B-General_Concept
renderer	I-General_Concept
.	O
</s>
<s>
Sets	O
of	O
parameter	O
values	O
can	O
be	O
saved	O
as	O
presets.While	O
it	O
is	O
possible	O
to	O
edit	O
filters	O
with	O
any	O
text	O
editor	O
,	O
Filter	B-Operating_System
Forge	I-Operating_System
includes	O
a	O
visual	O
node-based	O
filter	O
editor	O
.	O
</s>
<s>
In	O
the	O
editor	O
window	O
,	O
components	O
are	O
placed	O
on	O
a	O
workspace	O
and	O
connected	O
to	O
one	O
another	O
like	O
blocks	O
in	O
a	O
flowchart	B-Language
.	O
</s>
<s>
Filter	B-Operating_System
Forge	I-Operating_System
hosts	O
a	O
web-based	O
library	O
of	O
thousands	O
of	O
user-submitted	O
filters	O
that	O
can	O
be	O
previewed	O
and	O
downloaded	O
online	O
or	O
using	O
the	O
program	O
's	O
built-in	O
browser	O
.	O
</s>
