[Radiance-general] Color – Greyscale pic file transformation

[david behar]

Dear radiance community

I want to ask for your help
with dealing with pic files. Usually the results of Radiance
simulation of illuminance levels gives a spread of lines and values
by using colors or colored contours lines graphic representations. 
I want to ask if there is
anyway to transform the results from a color based presentations, to
Black and White presentations? Transforming the usual color result
into greyscale presentation do not give the responding scale of grey
values - for example – red is usually the color used for high
values, where once greyscaled, it gets a grey which is a middle hue
in relation to the others. 

I will be very happy for an
advice for how to make a fit in between a color scale of values and a
grey scale of values for a pic result ? 

Thank you very much!!
David
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