<s>
OpenVDB	B-Language
is	O
an	O
open	B-License
source	I-License
software	B-Library
library	I-Library
for	O
working	O
with	O
sparse	B-Algorithm
volumetric	B-Algorithm
data	I-Algorithm
.	O
</s>
<s>
Specifically	O
catering	O
for	O
feature	O
film	O
production	O
,	O
the	O
library	B-Library
was	O
originally	O
developed	O
by	O
DreamWorks	O
Animation	O
and	O
is	O
currently	O
maintained	O
by	O
the	O
Academy	O
Software	O
Foundation	O
(	O
ASWF	O
)	O
.	O
</s>
<s>
OpenVDB	B-Language
is	O
written	O
in	O
C++	B-Language
and	O
has	O
Python	B-Language
bindings	O
.	O
</s>
<s>
OpenVDB	B-Language
is	O
supported	O
in	O
a	O
wide	O
range	O
of	O
CGI	O
software	O
,	O
such	O
as	O
Blender	B-Application
(	O
since	O
April	O
2016	O
)	O
,	O
Cinema	B-Device
4D	I-Device
,	O
Houdini	B-Application
,	O
and	O
RenderMan	B-Application
.	O
</s>
<s>
It	O
was	O
first	O
used	O
in	O
the	O
films	O
Puss	O
in	O
Boots	O
(	O
2011	O
)	O
and	O
Rise	B-Application
of	I-Application
the	I-Application
Guardians	I-Application
(	O
2012	O
)	O
.	O
</s>
<s>
Over	O
the	O
years	O
VDB	O
has	O
been	O
interpreted	O
to	O
mean	O
different	O
things	O
,	O
none	O
of	O
which	O
are	O
very	O
descriptive	O
:	O
"	O
Voxel	B-Algorithm
Data	O
Base	O
"	O
,	O
"	O
Volumetric	B-Algorithm
Data	I-Algorithm
Blocks	O
"	O
,	O
"	O
Volumetric	O
Dynamic	O
B+tree	O
"	O
,	O
etc	O
.	O
</s>
<s>
In	O
early	O
presentations	O
of	O
VDB	O
even	O
a	O
different	O
name	O
was	O
used	O
,	O
"	O
DB+Grid	O
"	O
,	O
which	O
was	O
abandoned	O
to	O
emphasize	O
its	O
distinction	O
from	O
similarly	O
named	O
,	O
but	O
different	O
,	O
existing	O
sparse	B-Algorithm
data	O
structures	O
like	O
DT-Grid	O
or	O
DB-Grid	O
.	O
</s>
