Le 18-02-26 à 17:51, Mike Horvath a écrit :
> On 2/24/2018 12:23 PM, Alain wrote:
>> Le 18-02-24 à 11:07, Mike Horvath a écrit :
>>> On 2/23/2018 8:18 AM, Alain wrote:
>>>> The 3 lumen looks a little to bright.
>>>> Can you post the 1 lumen image?
>>>>
>>>> Also, the sun position is not the same for the two images. It mover 
>>>> by around 40°.
>>>
>>> Here it is with RGB instead of SRGB, and 1 lumens.
>>>
>>> https://i.imgur.com/AcGBbla.jpg
>>>
>>> As you can see, it is pretty dim and lifeless.
>>>
>>>
>>> Mike
>>
>> Slightly dimmer, not prety dim, than the 2 lumens but not lifeless on 
>> my monitor. Maybe your monitor is set to dim...
>> Definitively better than the 3 lumens version.
>>
>> Set assumed_gamma 1
>> When using lightsys, always use RGB for the lights. lightsys is made 
>> to return values in the rgb colour space, not the srgb one. You may 
>> use srgb for the textures.
>>
>>
>> Alain
> 
> My monitor is set to "SRGB". Dunno what it should be set to.
> 
> 
> Mike

Same thing here. sRGB is correct for the monitor.

But, what about the brightness and contrast settings? Normally, contrast 
should be set high (100%) and brightness relatively low (<30%). 
Brightness is to be adjusted for the ambient lighting level of the room, 
but not the contrast.
A low contrast makes your display washed out and generally lifeless.
If you have a saturation setting for the monitor, set it around 50% to 
start.

Next, you have the file gamma and display gamma to adjust. File gamma 
can be set from 1 to 2.2 or srgb, or something else if you want to. 
Display gamma should be the same as your actual gamma setting for the 
monitor : SRGB in your case.

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On 2/27/2018 8:38 PM, Alain wrote:
> Same thing here. sRGB is correct for the monitor.
> 
> But, what about the brightness and contrast settings? Normally, contrast 
> should be set high (100%) and brightness relatively low (<30%). 
> Brightness is to be adjusted for the ambient lighting level of the room, 
> but not the contrast.
> A low contrast makes your display washed out and generally lifeless.
> If you have a saturation setting for the monitor, set it around 50% to 
> start.
> 
> Next, you have the file gamma and display gamma to adjust. File gamma 
> can be set from 1 to 2.2 or srgb, or something else if you want to. 
> Display gamma should be the same as your actual gamma setting for the 
> monitor : SRGB in your case.


I just checked on my phone, and it looks just as bad. So, I don't know 
what's wrong with your monitor.


Mike

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On 2/25/2018 2:53 AM, Thomas de Groot wrote:
> I often use CIE.inc myself, maybe in a little different way than you do. 
> This is an example of how I define my sunlight in a scene:
> 
> #if (Fog)
>    #local Intensity    = 5;
> #else
>    #local Intensity    = 3;
> #end
> //Sun's temperature (Kelvin): 2800=red; 7500=blue white
> #declare SunColor     = Blackbody(6500)*Intensity;
> #declare SunPosition  = <0, 0, -2>*10e4;
> #declare SunDis       = vlength(SunPosition)*2/215;
> #declare Sun_alt      = 60;
> #declare Sun_azm      = -115;
> 

This is much lighter, thanks. But maybe a little too white. I want a bit 
more color, but don't have an atmosphere to filter the sun's rays.


Mike

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On 28-2-2018 6:17, Mike Horvath wrote:
> On 2/25/2018 2:53 AM, Thomas de Groot wrote:
>> I often use CIE.inc myself, maybe in a little different way than you 
>> do. This is an example of how I define my sunlight in a scene:
>>
>> #if (Fog)
>>    #local Intensity    = 5;
>> #else
>>    #local Intensity    = 3;
>> #end
>> //Sun's temperature (Kelvin): 2800=red; 7500=blue white
>> #declare SunColor     = Blackbody(6500)*Intensity;
>> #declare SunPosition  = <0, 0, -2>*10e4;
>> #declare SunDis       = vlength(SunPosition)*2/215;
>> #declare Sun_alt      = 60;
>> #declare Sun_azm      = -115;
>>
> 
> This is much lighter, thanks. But maybe a little too white. I want a bit 
> more color, but don't have an atmosphere to filter the sun's rays.
> 

Just play with the Intensity value :-)

Intensity=1; would be the normal use. I always adapt according to the 
scene I am working on.

-- 
Thomas

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