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andronikos916 wrote: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.

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 !!!!!

Maya69 wrote: 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.

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

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

Maya69 wrote: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.

really !!!

i try

yes ,

but you can explain for you a best setup

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)

thank you very much, jomaga.

It will very helpful tip.

Well, I'm forgotten this theread.

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

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

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.

thank jomega

i am sorry for my mistake....

for little test

best regard

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

I'm very thankful for your concern and advise.

My 1.1 version test.

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





this is above beta test.