Mentalray - Replacement for Standard Skylight?

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  12 December 2012
Mentalray - Replacement for Standard Skylight?

Hi all,

I have been using 3ds Max / Mentalray for a year now. In that time I have always used photometric lights with the addition of the MR Exposure Control.

I am trying to create an even light distribution and the soft contact shadows that the Standard Skylight produces without using standard lights. I ONLY want to use photometric lights!

So... is there a way that I can acheive this to add to realism of rendering with soft shadows?
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3ds Max Design 2012
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  12 December 2012
Anyone have any ideas??
__________________
--
3ds Max Design 2012
Dell XPS 730x - Windows 7 Ultimate x64
Intel Core i7 @ 3.20GHz
12 GB RAM
64 - bit Operating System
NVIDIA Quadro 6000
 
  12 December 2012
Perhaps create a sort of 'dome' of photometric lights? I've tried this before with some success.
You will have to turn down the brightness for each light, though, as there will be lots of them.
 
  12 December 2012
Won't this increase rendering times by adding loads of photometric lights all casting raytraced soft shadows?
__________________
--
3ds Max Design 2012
Dell XPS 730x - Windows 7 Ultimate x64
Intel Core i7 @ 3.20GHz
12 GB RAM
64 - bit Operating System
NVIDIA Quadro 6000
 
  12 December 2012
If the effect of skylight suits your needs, then you may consider using the Daylight System, found in Systems category.

Once you create it, sun and skylight is automatically created but it is photometric, unlike the ordinary Skylight you mention or Sunlight under the same systems category. If you turn off the sun component, you're left with skylight.
From the modify panel of daylight, you can also change the skylight mode from Mr Sky to IES sky (which contains presets for cloudy sky conditions) or the even the ordinary non-photometric Skylight (which lacks energy at multiplier=1 when used with photographic exposure) as well.

If the ordinary lights' energy levels becoming low at multiplier value= 1 is your problem, you may also consider increasing the multiplier to 20000. Or if you use photometric lights and need to turn off the exposure control -bacause of any incompatibility problems (like while using matte/shadow/reflection or alike) you may consider lowering the multiplier of the photometric lights (skies etc.) from 1 to 0.02.

addition: Don't forget to increase final gathering quality. Skylight effects can only be achieved when final gathering is on.

**You can use Ambient Occlusion to achieve soft dark areas also.

Last edited by Byteman3D : 12 December 2012 at 10:31 PM.
 
  12 December 2012
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