[Radiance-general] Colouring shadows

[Gregory J. Ward]

Hi Nick,

If you want to do this in Radiance, you can use the "picdiff.cal"  
definitions in ray/src/cal/cal like so:

	pcomb -f picdiff.cal -o sceneA.pic -o sceneB.pic > sceneCmp.pic

This should give you more or less what you're after.

-Greg

> From: "Nick Devlin" <nick at nickdevlinassociates.co.uk>
> Date: February 8, 2007 12:15:41 AM PST
>
> Dear All,
>
> I am trying to complete some overshadowing comparisons between an  
> existing
> and proposed buildings. I would like to generate a single set of  
> time based
> images to show the extent of any additional shading from the proposed
> compared to the existing situation.
>
> I would like to be able to highlight the shadows from each building  
> in a
> different colour. I could run the simulations twice, for each  
> building with
> a bias on the rgb of the sun and combine the images, but I am not sure
> whether this would work.
>
> Can anyone provide me with some guidance.
>
> Many thanks
>
> Nickd