[Radiance-general] Rendering parameters help and weird colors

[Germán Molina Larrain]

On the other hand, the reason I modeled the mountain is to actually
consider the shading it provides (that is the area I am working on)... so I
think just eliminate it would not be the solution.

Is color bleeding a problem that "would occur in real life"?? I mean, is a
modeling problem (clearly the mountain is not completely brown), or a weird
effect of the algorithms involved?

THANKS AGAIN!

German


2013/4/17 Germán Molina Larrain <gmolina1 at uc.cl>

> Hi Robert,
>
> My material definition was the following (I assume it is easy to notice
> what is what)
>
> void glass SL_glass
> 0
> 0
> 3 .92 .92 .92
>
> void plastic GroundMat
> 0
> 0
> 5  0.435 0.306 0.216  .00 0.06
>
> void brightfunc floorpat
> 2 .4*rand(floor(Px/.25)-.25*floor(Py/.25)-.25)+.6 .
> 0
> 0
>
> floorpat plastic Floor
> 0
> 0
> 5
>     .3 .3 .3  0 0
>
>
> void plastic SL_default_material #(basically every wall and ceiling)
> 0
> 0
> 5 .7 .7 .7 0 .01
>
> My ambient parameters were (the rest are all defaults):
>
> -ab 8 -ad 2000 -aa 0.05 -ar 256
>
> THANKS VERY MUCH
>
> German
>
>
> 2013/4/17 Guglielmetti, Robert <Robert.Guglielmetti at nrel.gov>
>
> Hey German,
>>
>> For sure it looks like there is some color bleeding, and also the fact
>> that you have modeled the entire mountain — making your model extents
>> fairly large relative to the area of interest (your building interior) is
>> likely causing you some pain here too. It would be helpful to see your
>> material definitions, and also your rendering parameters (particularly the
>> ambient (-a*) ones).
>>
>> Rob Guglielmetti
>> National Renewable Energy Laboratory (NREL)
>> Commercial Buildings Research Group
>> 15013 Denver West Parkway MS:RSF202
>> Golden, CO 80401
>> 303.275.4319
>> robert.guglielmetti at nrel.gov
>>
>>
>>
>> On 4/17/13 10:12 AM, "Germán Molina Larrain" <gmolina1 at uc.cl<mailto:
>> gmolina1 at uc.cl>> wrote:
>>
>> Dear List,
>>
>> So I have been rendering with some interesting features in SketchUp, like
>> exporting landscapes (hills and mountains) from GoogleEarth.
>>
>> Here is a link for you to understand what I am talking about<
>> https://www.dropbox.com/sh/ltv125db6hjp74a/hsnL6S-_JI>
>>
>> Anyway, I have been rendering some stuff and I have two doubts:
>>
>> 1.- My environment is basically grey, but only the mountain near my
>> building is brown; but everything has turned to be brown (as can be seen in
>> Image2)... is that the "color bleeding" (or something like that)? Is that a
>> good result? or there is a problem with my modeling?
>>
>> 2.- As can be seen in Image (the one that shows the interior of the
>> building, looking out), there are some weird effects, making my image to
>> look as it was painted with a brush or something. What is the parameter
>> that would help me reduce that?
>>
>> I am not sure why in Dropbox the images look much more darker than in my
>> PC. They were created using rpict, and then filtered with "pfilt -x /2 -y
>> /2 image.hdr > image.tiff"
>>
>> THANKS VERY MUCH
>>
>> German
>>
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>>
>
>
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