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Le 18-02-23 à 00:00, Mike Horvath a écrit :
> On 2/22/2018 11:56 PM, Mike Horvath wrote:
>> Are there any old scenes or renders that I can use to compare behavior
>> in old and current versions of POV-Ray? By default, using 1 lumens the
>> daylight scenes seem dim and washed out. I have to pump up the lumens
>> to 2 or 3 to get nice daylight colors and brightness. Thanks.
>>
>>
>> Mike
>
> This is a render with 2 lumens:
>
> https://i.imgur.com/wHmo76S.jpg
>
> This is a render with 3 lumens:
>
> https://i.imgur.com/Q50eHAz.jpg
>
> Here is the code I am using.
>
>
>
> // -------------------------------------------------------------
> // Nonstandard includes
>
> #include "CIE.inc" //
> http://www.ignorancia.org/en/index.php?page=Lightsys
> #include "lightsys.inc" //
> http://www.ignorancia.org/en/index.php?page=Lightsys
> #include "lightsys_constants.inc" //
> http://www.ignorancia.org/en/index.php?page=Lightsys
>
>
> // -------------------------------------------------------------
> // Lights
> // Sun is not at realistic distance and is not an area light like it
> should be.
> // Could use "sunpos.inc" here too to determine a correct position and
> angle.
>
> #declare light_source_lumens = 3; // float
> #declare light_source_temp = Daylight(6100); // float
> #declare light_source_color =
> Light_Color(light_source_temp,light_source_lumens); // float
> #declare light_source_location = vrotate(<0,0,-1000000000>,
> <-060,-060,+000>); // needs to be far enough above the clouds
> to cast shadows
>
> light_source
> {
> light_source_location
> srgb light_source_color
> parallel
> point_at <0,0,0>
> }
lightsys assume that you are using a linear colour space : Use rgb, not
srgb. Also, use assumed_gamma 1.
If you use srgb, then light components that are larger than 1 will get
their value reduced, potentially making your light somewhat dimer.
Alain
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