http://www.doschdesign.com
(
above
HDR
and
renderings
are
supported
by
Dosch
Design
)
When rendering an image with any rendering program, including V-Ray for SketchUp, you must understand three
main factors that will affect the image: Lighting, Materials, and Mapping. Lighting plays the most important role
among these three. It will
affect the color, shadow, reflection and refraction among every single object in the
scene.
V-Ray for SketchUp is a rendering engine equipped with Global Illumination (GI), which helps the users setup the
lighting for entire scene easily. So they don
'
t have to
spend
a
lot
of
time
adjusting
lighting
location
and
brightness
.
The concept of GI is very simple. Imagine a room has a window but no light in it. The natural light from the outside
of the room comes in through the window so the room doesn
'
t look completely dark even though there is no light in
it. Some people even call this the
“
lazy boy lighting
”.
Its
purpose
is
allowing
the
users
to
have
the
most
natural
light
possible
without
spending
too
much
time
to
achieve
it
.
V-Ray for SketchUp also supports High
Dynamic
Range values
,
also
called
HDRI
(
High
Dynamic
Range
Image
).
With
a
normal
24
bit
, 8
bit
per
channel
RGB
image
(
Low
Dynamic
Range
Image
),
the
brightest
white
color
you
can
get
is
R
255,
G
255
and
B
255.
But
this
is
still
thousands
times
lower
than
what
the
sun
light
can
produce
.
With
the
HDR
file
format
,
users
can
have
more
control
ranging
from
dark
to
bright
.
The
HDR
is
a
very
special
image
file
format
.
It
usually
starts
with
professional
360
degree
photography
,
then
transforms
to
96
bit
full
scene image by using
professional HDR software. The benefit of using HDR is that you can use this full scene image as your render light
source. It also can be used as the back ground rendering.
V-Ray for SketchUp also supports regular image file formats as light source for GI.
However, it is still limited when using HDR image format to describe the lighting environment. Together with
other regular image file format simulated lighting environments, it usually being used only as supporting lighting
for
the
entire
scene
.
That
means
adjusting
the
setting
of
major
light
sources
is
still
a
very
important
work
in
V
-
Ray
for
SketchUp.
We
will
discuss
more
about
how
to
use
lighting
,
materials
and
mapping
later
.
Before you start rendering with V-Ray for SketchUp
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