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Modo lights / Maxwell emitters

Posted: Mon Dec 05, 2011 7:17 pm
by mocpop
I'm just trying some things with Maxwell ...

For all who aren't confirm with it: a difference between Modo and Maxwell is that Maxwell don't use lights as Modo does.
I set up a location with two large Area-Lights in Modo and exported the scene then to Maxwell to see how this Renderer will interpret this.

My Area-Lights in Modo are shining with 3.0 W/smr2 -> because they are large, the location becomes bright enough. But, the emitters in Maxwell are working on a different way. Saying to them they should shine also with 3.0 W is ... the result is not at all bright like in Modo.

How can I convert/translate the light correctly from Modo to Maxwell?

Anybody out there who knows this?
Thank you,
Alain

Re: Modo lights / Maxwell emitters

Posted: Mon Dec 05, 2011 11:00 pm
by Marton Day8
Hi Alain,

It is not possible to find a perfect conversion value between modo lights and Maxwell lights. The two engines have different methods to calculate the final image. The visual brightness of the Maxwell emitter depends on some other parameters (camera ISO, shutter speed), and also modo light brightness is dependent on some other modo parameters (Global Illumination, Indirect Bounces, etc.).

But the plugin has a parameter called "Radiance Multiplier", and it can help you to match the brightness of the Maxwell light to the modo scene light.
1. First you have to click on a light item in modo.
2. In the Maxwell Render panel "Radiance Multiplier" parameter appears.
3. It is 1.0 in default but you can change it to (for example) 2.0 if you want the plugin to export the light material with double Watt value.

I hope it helps!

Márton

Re: Modo lights / Maxwell emitters

Posted: Tue Dec 06, 2011 10:27 am
by mocpop
Ok, thank you!

Alain