[sandykoufax]

for the sun use these settings:

sphere about 20cm radius
distand from aeroplane around 100mm (maybe 200m do not know exactly - depends). But not 300km !

here are the sun settings that I use as defaults:

Illuminants: Custom
Intendity: 2000 W/(m^2sr)
Color: orange-yellow

In the beta version, we could make sun emitter like andronikos method.

This is my old test with beta




but in the 1.1 version, how could I make the sun emitter?

I want to make the sun and moon with emitter.

Please tell me.

[Maya69]

may be this just a idea

the probleme with maxwell 1.1 is emiter power is limited

you can't fake a sun !!!!


but if you use very small scene size and if you change film size ( a little setup) you can modifie a deph of filed

if use little film size you have a little depth fild (this is a principe of compact camera numerique)

may be try !!!!!

[sandykoufax]

the probleme with maxwell 1.1 is emiter power is limited

you can't fake a sun !!!!

Oh, it's very sad thing.

Hey, NL guys.

Please give us back the power of emitter.

[Maya69]

just a little test for little size setting

a film setting 0.24 x 0.36 and focal 1 mn



i don't think you can use a physical ky but you can use hrdi sky

best regard

[sandykoufax]

Thank you very much Maya for your quick test and reply.

[jomaga]

the probleme with maxwell 1.1 is emiter power is limited
you can't fake a sun !!!!

Limited?
You can set now an emitter with 1.000.000.000 W X 683 lumen/w = 683.000.000.000 lumen, or also 1.000.000.000 luxes (lumen/m^2)
A high power metal halide lamp (2500W - 240.000 lumen) is used to fake sun in photography or films, so 683.000 million lumens is a high enough limit.
Usually, the luminance of midday sun (clear day without cluods) in Madrid is over 65.000 luxes, so, probably (not tested), a sphere with an emitter set with 4000 to 5500 K (from sunset to midday) and 75.000 luxes should fake the sun.

[Maya69]

really !!!

i try

[Maya69]

yes ,

but you can explain for you a best setup

[jomaga]

Hi! I'm testing an artificial sun:
Scene plane 5x5m
Box 0,7x0,7x0,7m
Cylinder 0,2m diam x1,2m high

1m diam Sphere emitter placed 120m far (shorter distances make blur shadows)

Settings of emitter material: 4500 K colour temperature, 550.000.000 luminance nit (cd/m2)

1. Skylight + sunlight 11:00AM Madrid

2. Skylight + emitter


btw, sunlight + skylight seem to be faster, at least in exteriors (both reached SL 9,5 and emitter one have more noise)

[sandykoufax]

thank you very much, jomaga.

It will very helpful tip.

Well, I'm forgotten this theread.

http://www.maxwellrender.com/forum/view ... 935#170935

[jomaga]

Thanks sandy
In this page
http://www.kayelaby.npl.co.uk/general_p ... 2_5_3.html
There is a measured luminance and colour temperature of some light sources like Zenith sun (through atmosphere) : 1 600 000 000 cd /m^2 and 5400K, three times the value I've reached, but pretty close IMHO
There is also a value for moonlight : Moon (through atmosphere) ~ 400 cd /m^2

[sandykoufax]

Oh. thank you so much for concern and kind answer.

your link is so difficult to understand for me, but I have to examine carefully.

[Maya69]

thank jomega

i am sorry for my mistake....

for little test

best regard

[sandykoufax]

Maya, though you have a little mistake, but never mind.

I'm very thankful for your concern and advise.

[sandykoufax]

My 1.1 version test.

The same scene with beta and 1.1 while 5min tests.





this is above beta test.