[Radiance-general] Antimatter

[Greg Ward]

Hi Giovanni,

Which version of Radiance are you using?  There was a bug in 3.8  
relating to antimatter and shadows, which was (hopefully) fixed in  
version 3.9.

-Greg

> From: "Giovanni Betti" <gbetti at fosterandpartners.com>
> Date: October 30, 2009 9:40:22 AM PDT
>
> Dear All,
>
> It has been a real pleasure to have the chance to be at the radiance
> workshop in Cambridge and to meet all the great guys there and to  
> listen
> to so many inspiring presentations (btw, really looking forward to see
> them on line!)
>
> Now back to the office and again fighting with day to day issues. I am
> trying to model a series of openings in a screen using antimatter  
> and I
> am getting really confused.
> The screen is modelled as a single surface intersected by a number of
> cubes. As in the antimatter description I read:
> "The viewpoint must be outside all volumes concerned for a correct
> rendering." I assume that means that the camera should not be inside  
> one
> of the cubes and that (I guess) the cube normals should point outward.
> Done that, I am able to see through the cubes but I do not see the
> pattern of light coming through the antimatter holes, I just have a  
> big
> solid shadow...
>
> Is that how it is supposed to behave? Does anybody have any clue about
> what I am doing wrong?
>
> Thanks in advance,
> Best,
>
> Giovanni