Boxes

Boxes are simple ractangular boxes which emit their own light and reflect direct sunlight. They can also be partially transparent. The appropriate lines for the box object in the scene file are

number_of_times 1
time x y z theta phi chi
0 500 0 30 90 180 180
name: boxabc
type: box
input: box.dat
priority: 3

And the contents of the box.dat file are:

RenderWorld_data_file box 1 1
length_x 1
length_y 1
length_z 1
Number_of_bands 3
Band_ID 1 2 3
Radiance 20 0 0
Reflectance .1 .2 .3
Transmission 0 0 0
end
The lengths are the dimensions of the box in meters, Radiance is the intrinsic light emitted by the box, Reflectance is its diffuse reflectivity of sunlight (other lights and ambient skylight are not reflected), and Transmission controls the transparency of the box.

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