Editing Boxed Sun (section)

==Background==
It would seem that [at least] two conditions will need to be met in order for the skylight to look convincing:
* Light collimation
* Rayleigh scattering

Collimated light creates the effect of a distant light source. This should be possible using a lens or a reflector:

[[File:Collimated.jpeg]]

While a lens of this size may not be practical and a Fresnel lens will produce unwanted distortions, a parabolic reflector can be created by mirror'izing a parabolic dish, as seen in the video above.

Rayleigh scattering is what makes the sky blue and, in scattering some of the blue light, makes the Sun's light appear "[https://en.wikipedia.org/wiki/Color_temperature warmer]". As the Sun's angle changes (with the time of day, the season, one's location on Earth), its rays' path through the atmosphere varies in length, and therefore the amount of scattering varies, resulting in a color change.

The engineers at CoeLux appear to have achieved this with some sort of film containing nanoparticles; this seems worth looking into and perhaps recreating [or purchasing, if that's an option]. In the video above, a similar effect is achieved using a volume of soapy water; this has some advantages as well as some disadvantages.