Cousin Ricky <ric### [at] yahoocom> wrote:
> On 2022-03-21 14:41 (-4), Cousin Ricky wrote:
> > On 2022-03-21 10:58 (-4), Chris R wrote:
> >> I am working on a scene that is lit by moonlight coming through a window with
> >> partially open blinds. I use LightSys, and have set up the light source as an
> >> area light just outside of the window itself.
> >> I was wondering if anyone had suggestions for good color/lumens combinations to
> >> simulate moonlight. I am currently using a made-up color of <0.45, 0.5, 0.75>
> >> and an intensity of 1.0 with no fading, (so I guess I'm not really using
> >> LightSys to great effect here). Has anyone done any spectrum analysis for
> >> moonlight to suggest better values?
> > Lumens is not what you want for moonlight; this is a measure of the
> > total amount of light emitted (or reflected, in this case). Lux is the
> > proper unit for a light source that is effectively at infinity.
> > Wikipedia says 0.05 to 0.3 lux. That's quite a range!
> > To get a narrower precision, a preliminary calculation is:
> > [snip]
> I just noticed that nowhere in your OP did you mention that the Moon is
> full. Please keep in mind that my reply, as well as the Wikipedia
> figures, are for a full Moon.
Yes, I am using a full moon for this scene. I have added a visible element for
the moon, but none of the views I have been working on for the scene actually
make it visible, so the texture of the moon object itself is not as important.
I am mostly looking to get the right color/intensity for the light source.
I am pretty sure LightSys does not have anything that converts lux to
light_source color, so I'll have to look into that.
-- Chris R.
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