[Radiance-general] Strange halo artifact in rendering

[giulioandrea antonutto foi]

unless you did already,
try:
 -as 0
and -ad as you please
G

On 15 Mar 2013, at 04:56, Mark Stock <mstock at umich.edu> wrote:

> Folks,
> 
> I am stumped. There is a halo around a black box on a grey background
> in a rendering, and I can't figure out how to get rid of it (because I
> can't imagine that it's real).
> 
> I am preparing renderings for an art submission, and I am simulating a
> little model mountain inside a small flat black frame on a light grey
> wall, in a room with an array of ceiling lights and one spot. Here is
> what happens (rpict and mountain-removed rvu):
> 
> http://markjstock.org/transfer/whyTheHaloMaster.png
> http://markjstock.org/transfer/whyTheHalo.png
> 
> The black material is plastic with 0.0 specularity.
> The halo is independent of the ambient parameters.
> The halo is independent of -lw refinement.
> The halo is still there if the black box touches the wall or is offset a little.
> The halo doesn't go away when I render at high resolution.
> 
> Can anyone tell me what is going on here? Unzip and run "make" on:
> http://markjstock.org/transfer/whatGives.zip
> 
> Mark
> 
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