<s>
DirectX	B-Algorithm
Raytracing	I-Algorithm
(	O
DXR	O
)	O
is	O
a	O
feature	O
introduced	O
in	O
Microsoft	O
's	O
DirectX	B-Application
12	O
that	O
implements	O
ray	B-Algorithm
tracing	I-Algorithm
,	O
for	O
video	O
graphic	O
rendering	O
.	O
</s>
<s>
DXR	O
was	O
released	O
with	O
the	O
Windows	B-Operating_System
10	I-Operating_System
October	O
update	O
(	O
version	O
1809	O
)	O
on	O
October	O
10	O
,	O
2018	O
.	O
</s>
<s>
It	O
requires	O
an	O
AMD	B-Device
Radeon	I-Device
RX	I-Device
6000	I-Device
series	I-Device
or	O
Nvidia	O
GeForce	O
10-	O
,	O
20-	O
,	O
30-	O
,	O
or	O
40-series	O
video	B-Device
card	I-Device
,	O
which	O
is	O
designed	O
to	O
handle	O
the	O
high	O
computing	O
load	O
used	O
for	O
ray	B-Algorithm
tracing	I-Algorithm
.	O
</s>
<s>
With	O
the	O
introduction	O
of	O
DXR	O
in	O
October	O
,	O
four	O
new	O
features	O
were	O
added	O
to	O
DirectX	B-Application
12	O
:	O
</s>
<s>
These	O
are	O
used	O
by	O
the	O
GPU	O
to	O
begin	O
the	O
raytracing	B-Algorithm
process	O
.	O
</s>
<s>
New	O
HLSL	B-Language
shaders	O
,	O
ray-generation	O
,	O
closest-hit	O
,	O
any	O
hit	O
,	O
and	O
miss	O
,	O
that	O
are	O
used	O
describe	O
computationally	O
what	O
DXR	O
is	O
doing	O
when	O
rendering	O
raytracing	B-Algorithm
.	O
</s>
<s>
These	O
shaders	O
utilize	O
the	O
TraceRay	O
function	O
in	O
HLSL	B-Language
to	O
trace	O
rays	O
in	O
the	O
environment	O
.	O
</s>
<s>
Raytracing	B-Algorithm
pipeline	O
state	O
,	O
a	O
counterpart	O
to	O
the	O
current	O
Graphics	O
and	O
Compute	O
pipeline	O
state	O
objects	O
.	O
</s>
<s>
DXR	O
was	O
released	O
to	O
the	O
public	O
on	O
October	O
10	O
,	O
2018	O
with	O
the	O
Windows	B-Operating_System
10	I-Operating_System
October	O
update	O
(	O
version	O
1809	O
)	O
.	O
</s>
<s>
The	O
first	O
major	O
update	O
was	O
made	O
to	O
DXR	O
on	O
May	O
27	O
,	O
2020	O
with	O
the	O
Windows	B-Operating_System
10	I-Operating_System
May	O
update	O
(	O
version	O
2004	O
)	O
.	O
</s>
<s>
The	O
May	O
update	O
implemented	O
DXR	O
Tier	O
1.1	O
,	O
which	O
allows	O
game	O
engines	O
to	O
make	O
real	O
time	O
calculations	O
which	O
makes	O
the	O
raytracing	B-Algorithm
graphics	O
faster	O
and	O
more	O
efficient	O
.	O
</s>
