Relevant to Blender v2.31
Adds a background image (environment map), colour or sky to your render.
Pathlight and Hemilight can sample the background colour and intensity to simulate real world lighting.
<background type="image" name="envnorm" power="1.000000">
<filename value="C:\directory\image.jpg"/>
</background>
type - image: Allows you to
use a bitmap image of one of the supported
texture formats as a background. The image is mapped around the
scene as a sphere, so the image should be in latitude/longitude
format (ratio 2:1).
name: Background Name.
Power: Level of brightness
of the bitmap. 1.0 is default, greater numbers will increase
brightness, lower numbers will decrease brightness.
filename: Full path and filename of the image,
including the file extension.
<background type = "HDRI" name = "envhdri" exposure_adjust = "0">
<filename value = "C:\directory\image.hdr" />
</background>
type - HDRI: Allows you to
use an HDR image as a background. The HDRI is mapped around the scene
as an angular map, not latitude longitude like the normal image
background.
name: Background Name.
exposure_adjust: Similar to
'power' for a normal image background. 0 is default, increasing this
will brighten the HDR, decreasing will darken (equivalent to
adjusting the f-stop on a physical camera).
filename: Full path and filename of the HDRI,
including the file extension.
<background type="constant" name = "constbackg">
<color r="1.000000" g="1.000000" b="1.000000"/>
</background>
type - constant: Lets you
assign a single colour as the background.
name: Background Name.
color: r - red value of color (0.000000 - 1.000000) g
- green value of color (0.000000 - 1.000000) g - green value of
color (0.000000 - 1.000000). 1/1/1 is white, 0/0/0 is black.
<background type="sunsky" name ="Sun1" turbidity ="4.000000" add_sun="on" sun_power="1.000000"
a_var="1.000000" b_var="1.000000" c_var="1.000000" d_var="1.000000" e_var="1.000000" >
<from x="-0.007401" y="8.589217" z="3.737965"/>
</background>
type - sunsky: Lets you
assign a realistic sky background with optional sun.
turbidity: Atmosphere density (eg mist/fog) the lower
the number, the less visible the sky is. A value of 4 is a clear
sky.