Combining "trans" and "glass"

One of our designers proposed a detail where (if I remember correctly) an exterior layer of transparent glass is combined with an internal layer of Solera translucent material. Is there a simple way to combine the transmissivities of the two materials?

I am almost thinking it might be better to use a different variant of Solera, just to avoid the calculation!

Randolph

You're looking to combine these for a Radiance simulation? Why not just have two polygons, one for the trans and one for the glass, slightly offset from one another?

···

On 12/17/14, 12:16 AM, "Randolph Fritz" <[email protected]<mailto:[email protected]>> wrote:

One of our designers proposed a detail where (if I remember correctly) an exterior layer of transparent glass is combined with an internal layer of Solera translucent material. Is there a simple way to combine the transmissivities of the two materials?

I am almost thinking it might be better to use a different variant of Solera, just to avoid the calculation!

Randolph

The last time I tried that, I don't recall it working, though maybe that was a different situation.

Randolph M. Fritz
Luma
206.596.8625 d

···

-----Original Message-----
From: Guglielmetti, Robert [mailto:[email protected]]
Sent: Wednesday, December 17, 2014 7:19 AM
To: Radiance general discussion
Subject: Re: [Radiance-general] Combining "trans" and "glass"

You're looking to combine these for a Radiance simulation? Why not just have two polygons, one for the trans and one for the glass, slightly offset from one another?

On 12/17/14, 12:16 AM, "Randolph Fritz" <[email protected]<mailto:[email protected]>> wrote:

One of our designers proposed a detail where (if I remember correctly) an exterior layer of transparent glass is combined with an internal layer of Solera translucent material. Is there a simple way to combine the transmissivities of the two materials?

I am almost thinking it might be better to use a different variant of Solera, just to avoid the calculation!

Randolph

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What about it didn't work? Andy McNeil did a nice analysis of the
two-polygon versus "combined" approaches on the Unmet Hours forum
recently, albeit with clear glazing. He showed that trying to combine
materials without doing the proper ray traversals is dubious, basically.
See this thread:

vity-for-igus/

I'd think that if it fails with two pieces of specularly transmitting
materials, the results would potentially be even worse with a mix of
transmittance types.

- Rob

···

On 12/17/14, 9:35 AM, "Randolph Fritz" <[email protected]> wrote:

The last time I tried that, I don't recall it working, though maybe that
was a different situation.

Randolph M. Fritz
Luma
206.596.8625 d

-----Original Message-----
From: Guglielmetti, Robert [mailto:[email protected]]
Sent: Wednesday, December 17, 2014 7:19 AM
To: Radiance general discussion
Subject: Re: [Radiance-general] Combining "trans" and "glass"

You're looking to combine these for a Radiance simulation? Why not just
have two polygons, one for the trans and one for the glass, slightly
offset from one another?

On 12/17/14, 12:16 AM, "Randolph Fritz" ><[email protected]<mailto:[email protected]>> wrote:

One of our designers proposed a detail where (if I remember correctly) an
exterior layer of transparent glass is combined with an internal layer of
Solera translucent material. Is there a simple way to combine the
transmissivities of the two materials?

I am almost thinking it might be better to use a different variant of
Solera, just to avoid the calculation!

Randolph

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general