Sources for material reflectances

radiance-general
1

Hi,

I was wondering whether there are any comprehensive sources with
material visible light reflectances (for a range of construction
materials)? I have come across publications that have some information
but they typically contain only a few material reflectances, rarely
more than 20 and do not go into much detail about anticipated
variations in material reflectances. I often I have to look up one
material reflectance in one source and then look for another material
in another source.

I looked through the Radiance archives and while the question of a
database has come up before, it sounds like there is no such database?
Is there at least a relatively comprehensive source one could
reference for architectural lighting analyses?

Thank you,

Krystyna

2

Hi Krystyna,

Google led me straight to a little Radiance material collection at the BPS wiki site:

  http://archbps1.campus.tue.nl/bpswiki/index.php/Radiance

I wish there were more there, but the nice thing about a wiki is that everyone can contribute. Measuring materials and getting them right in Radiance is time-consuming, and usually tackled on a per-model basis. As an architect, I'm sure you appreciate how variable even something as basic as gray masonry blocks can be. Even if manufacturers produced to a uniform reflectance, the material pattern and scale can vary significantly. Nevertheless, it would be a big help to just have a comprehensive set of generic materials.

We should probably link the above in Francesco Anselmo's wiki site, which is also worth a look

  http://www.bozzograo.net/radiancewiki/doku.php?id=material_collections

Best,
-Greg

···

From: Krystyna Zelenay <[email protected]>
Date: April 15, 2011 4:19:10 PM PDT

Hi,

I was wondering whether there are any comprehensive sources with
material visible light reflectances (for a range of construction
materials)? I have come across publications that have some information
but they typically contain only a few material reflectances, rarely
more than 20 and do not go into much detail about anticipated
variations in material reflectances. I often I have to look up one
material reflectance in one source and then look for another material
in another source.

I looked through the Radiance archives and while the question of a
database has come up before, it sounds like there is no such database?
Is there at least a relatively comprehensive source one could
reference for architectural lighting analyses?

Thank you,

Krystyna

3

A few additional resources, but I cannot certify their accuracy:

Click Chooser tab on this page to view RAL, Munsell, Dulux, and building material lists. A note will pop up indicating the source of information when you pick each material list.
http://www.jaloxa.eu/resources/radiance/colour_picker/index.shtml

http://arch.xtr.jp/radiance/mat_database.htm

http://www.artifice.com/radiance/radmatlib.html

···

-----Original Message-----
From: Greg Ward [mailto:[email protected]]
Sent: Friday, April 15, 2011 9:48 PM
To: Radiance general discussion
Subject: Re: [Radiance-general] Sources for material reflectances

Hi Krystyna,

Google led me straight to a little Radiance material collection at the BPS wiki site:

  http://archbps1.campus.tue.nl/bpswiki/index.php/Radiance

I wish there were more there, but the nice thing about a wiki is that everyone can contribute. Measuring materials and getting them right in Radiance is time-consuming, and usually tackled on a per-model basis. As an architect, I'm sure you appreciate how variable even something as basic as gray masonry blocks can be. Even if manufacturers produced to a uniform reflectance, the material pattern and scale can vary significantly. Nevertheless, it would be a big help to just have a comprehensive set of generic materials.

We should probably link the above in Francesco Anselmo's wiki site, which is also worth a look

  http://www.bozzograo.net/radiancewiki/doku.php?id=material_collections

Best,
-Greg

From: Krystyna Zelenay <[email protected]>
Date: April 15, 2011 4:19:10 PM PDT

Hi,

I was wondering whether there are any comprehensive sources with
material visible light reflectances (for a range of construction
materials)? I have come across publications that have some information
but they typically contain only a few material reflectances, rarely
more than 20 and do not go into much detail about anticipated
variations in material reflectances. I often I have to look up one
material reflectance in one source and then look for another material
in another source.

I looked through the Radiance archives and while the question of a
database has come up before, it sounds like there is no such database?
Is there at least a relatively comprehensive source one could
reference for architectural lighting analyses?

Thank you,

Krystyna

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