U g I n f o r d e s I g n e r s

To avoid the self-illuminated object become white, please also refer to the Color Mapping 
Adjust the Intensity
Default set the Intensity to 1. Below images are rendered with
Intensity
of
3 (
left
) 
and
5 (
right
).
V-Ray for SketchUp
40

---

5
. 
Click on Update Preview and you will see the Bitmap is now on the material ball. Render it and you will get 
the result as the image on the right.
4
. After the bitmap is selected, the 
“
m
” 
now
becomes
“
M
”. 
Click
on
the
Update
button
to
preview
the
bitmap
. 
Click
on
Apply
and you 
can use this bitmap as the light source.
3
. Under Bitmap, click on the “m” to the 
right of the file and pick a bitmap to use as 
the light source
Emissive Textures
Except using colors as light source for the self-illuminated materials, you can also use texture map 
directly as light source.
. Click on the 
“
m
” 
to
the
right
of
the
Color
under
Emissive
control
panel
.
. The Texture Editor will then open up. Select Bitmap from Type
'
s pull down menu and you will see the 
control panel show up to the right.
1
2
V-Ray for SketchUp
41

---

The darker environment lighting will not affect the Bitmap setting for self-illuminated material (ipod 
image)
. 
The
Bitmap
will
still
render
as
its
own
setting
for
brightness
. 
Use
the
same way to create cold light 
effect. Also showed below are two other examples. 
Please note that if any type of map is being used in
Texture
Editor
, 
the
Color
and
Intensity
under
Emissive
will
no
longer
function
. 
You
can
'
t use these two options to control the brightness of the 
material any more. You need to click on the 
“
M
” 
and
go
back
to
the Texture Editor and adjust 
brightness there.
All
other
control
options
in
the
Texture
Editor
work
the
same
like
this
. 
Click on the 
“
M
” 
and
go
back
to
the
Texture
Editor
window
. 
Please
pay
special
attention
to
below
options
as
these
options
are
often
used
for
controlling
the
Bitmap
texture
map
.
Multiplier: Controls the intensity of the Bitmap. Default set to 1. Increase this number will intensify the 
color tone, brightness and color contrast. Preview will not show much of difference if the value is too 
small. 
Blur under Bitmap: Control the blurriness of the Bitmap. Default set to 0.15. Set to 0 will not have any 
blur effect to the Bitmap.
Override under Bitmap: Adjust the Gamma value of the Bitmap. 
Increase the value will make the Bitmap brighter. This 
parameter is also important for linear workflow
Tile: Repeat the Bitmap texture on the object. Default set to 
selected. When uncheck the Tile, you will see only one Bitmap 
texture on the object.
UVW Repeat: Controls how many times a map is repeated 
within a given space (either within the surface, or within 
mappings)
UVW Rotation: Adjust the degree of rotation of the Bitmap