<s>
VistaPro	B-Algorithm
is	O
3D	O
scenery	O
generator	O
for	O
the	O
Amiga	B-Device
,	O
Macintosh	B-Device
,	O
MS-DOS	B-Application
,	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Vista	O
operates	O
similarly	O
to	O
a	O
ray	B-Algorithm
tracer	I-Algorithm
in	O
that	O
light	O
paths	O
are	O
generated	O
.	O
</s>
<s>
The	O
ground	O
itself	O
may	O
either	O
be	O
generated	O
from	O
a	O
random	O
(	O
or	O
user	O
inputted	O
)	O
number	O
,	O
or	O
it	O
may	O
use	O
DEM	O
landscape	O
files	O
for	O
real-world	O
views	O
,	O
the	O
software	O
having	O
come	O
with	O
a	O
number	O
of	O
maps	O
of	O
Mars	B-Application
and	O
Earth	O
.	O
</s>
<s>
Vista	O
can	O
load	O
and	O
save	O
output	O
images	O
in	O
PCX	O
,	O
BMP	B-Device
,	O
JPG	O
and	O
Targa	O
file	O
formats	O
.	O
</s>
<s>
PCX	O
files	O
can	O
also	O
be	O
imported	O
as	O
elevations	O
and	O
ground	O
colors	O
to	O
allow	O
third-party	O
creation	O
of	O
landscapes	O
in	O
other	O
image	B-Application
editors	I-Application
.	O
</s>
<s>
Trees	O
can	O
be	O
placed	O
on	O
landscapes	O
as	O
either	O
2D	B-Algorithm
or	O
3D	O
objects	O
.	O
</s>
<s>
In	O
2D	B-Algorithm
,	O
the	O
trees	O
always	O
face	O
the	O
camera	O
and	O
are	O
fast	O
to	O
generate	O
.	O
</s>
<s>
For	O
Amiga	B-Device
:	O
</s>
<s>
For	O
MS-DOS	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
:	O
</s>
<s>
For	O
Macintosh	B-Device
:	O
</s>
<s>
The	O
Amiga	B-Device
version	O
of	O
Vista	O
works	O
on	O
all	O
models	O
of	O
Amiga	B-Device
,	O
however	O
due	O
to	O
the	O
low	O
processor	O
speeds	O
generation	O
of	O
landscapes	O
take	O
a	O
long	O
time	O
to	O
complete	O
.	O
</s>
<s>
It	O
was	O
not	O
unusual	O
for	O
a	O
landscape	O
generation	O
to	O
take	O
several	O
hours	O
on	O
a	O
stock	O
68000	B-Device
based	O
computer	O
.	O
</s>
<s>
Later	O
versions	O
,	O
for	O
32-bit	O
Amigas	B-Device
,	O
support	O
the	O
MC68881/68882	O
FPU	B-General_Concept
,	O
speeding	O
up	O
rendering	O
considerably	O
when	O
such	O
a	O
chip	O
is	O
present	O
.	O
</s>
<s>
The	O
PC	O
version	O
runs	O
in	O
MS-DOS	B-Application
for	O
the	O
earlier	O
versions	O
,	O
and	O
from	O
4.00	O
onwards	O
it	O
runs	O
on	O
all	O
versions	O
of	O
32-bit	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
This	O
sequence	O
involved	O
a	O
silver	O
spaceship	O
flying	O
through	O
a	O
series	O
of	O
valleys	O
that	O
had	O
been	O
generated	O
using	O
VistaPro	B-Algorithm
(	O
Vista	O
did	O
n't	O
support	O
generating	O
animations	O
until	O
the	O
Pro	O
version	O
was	O
released	O
)	O
.	O
</s>
<s>
Vista	O
was	O
also	O
used	O
(	O
both	O
PC	O
and	O
Amiga	B-Device
versions	O
)	O
for	O
the	O
book	O
by	O
Arthur	O
C	O
.	O
Clarke	O
called	O
"	O
The	O
Snows	O
of	O
Olympus	O
"	O
,	O
a	O
picture	O
book	O
about	O
terraforming	O
Mars	B-Application
.	O
</s>
