<s>
S2TC	B-Algorithm
(	O
short	O
for	O
Super	O
Simple	O
Texture	O
Compression	O
)	O
is	O
a	O
texture	O
compression	B-General_Concept
algorithm	I-General_Concept
based	O
on	O
Color	B-Algorithm
Cell	I-Algorithm
Compression	I-Algorithm
.	O
</s>
<s>
It	O
is	O
designed	O
to	O
be	O
compatible	O
with	O
existing	O
patented	O
S3TC	O
decompressors	B-General_Concept
while	O
avoiding	O
any	O
need	O
for	O
patent	O
licensing	O
fees	O
.	O
</s>
<s>
According	O
to	O
the	O
authors	O
,	O
compressed	O
textures	O
produced	O
by	O
a	O
good	O
S2TC	B-Algorithm
implementation	O
are	O
similar	O
in	O
quality	O
to	O
compressed	O
textures	O
produced	O
by	O
a	O
bad	O
S3TC	O
implementation	O
.	O
</s>
<s>
The	O
S2TC	B-Algorithm
reference	O
implementation	O
is	O
also	O
capable	O
of	O
decompressing	O
S3TC	O
compressed	O
textures	O
,	O
but	O
instead	O
of	O
implementing	O
the	O
patented	O
aspects	O
of	O
the	O
algorithm	O
,	O
the	O
S2TC	B-Algorithm
decompressor	O
picks	O
colors	O
at	O
random	O
.	O
</s>
<s>
S2TC	B-Algorithm
was	O
created	O
to	O
provide	O
an	O
alternative	O
to	O
S3TC	O
for	O
open	B-Application
source	I-Application
OpenGL	B-Application
implementations	O
which	O
were	O
legally	O
constrained	O
from	O
implementing	O
patented	O
algorithms	O
.	O
</s>
