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    Hi Christopher and Nick,<br>
    <br>
    In terms of some more real world examples, we have been working on
    an opaque materials database: <a
      href="http://www.lighting-materials.com/"><a class="moz-txt-link-freetext" href="http://www.lighting-materials.com/">http://www.lighting-materials.com/</a></a>
    The website is still a bit in progress, and we are still collecting
    measurements, but the goal is to give realizable examples of
    material reflectances, especially for unusual materials. And it
    works right now!<br>
    <br>
    It is relatively easy to find blue colored materials by searching
    via color. A quick ordinal diagram is below,<br>
    <img alt="" src="cid:part2.04020309.07060107@jakubiec.net"
      height="319" width="550"><br>
    <br>
    We have also measured several wood surfaces, which you can find by
    searching by name for 'wood.' Hopefully this can also help to
    bracket your material properties and define some proper R-G-B color
    combinations for your scene. There are also a number of white wall
    surfaces in the database. By clicking on any of the results, you get
    more detailed information including the R-G-B primaries for a
    physically-based Radiance material. There is some more information
    about this undertaking in the second half of our <a
href="http://radiance-online.org/community/workshops/2015-philadelphia/presentations/day3/jakubiec-balakrishnan_materials.pdf">Radiance
      workshop presentation</a> given last month in Philadelphia.<br>
    <br>
    I agree that defining specific textures and wood grains is painful
    and difficult to make accurate. In my opinion the texture of the
    carpet tiles and the wood surfaces can be ignored unless those
    aspects will modify the light contribution significantly. By trying
    to get this as correct as possible, you are already doing way more
    than the average LEEDv4 lighting simulation, I am certain.<br>
    <br>
    All the best,<br>
    Alstan<br>
    <br>
    <small>J. Alstan Jakubiec <br>
      Assistant Professor <br>
      Architecture and Sustainable Design <br>
      Singapore University of Technology and Design <br>
      8 Somapah Road, Singapore 487372 <br>
      telephone: +65 6499 4530, e-mail: <a
        class="moz-txt-link-abbreviated"
        href="mailto:john_jakubiec@sutd.edu.sg"><a class="moz-txt-link-abbreviated" href="mailto:john_jakubiec@sutd.edu.sg">john_jakubiec@sutd.edu.sg</a></a>
      <br>
      <a href="http://asd.sutd.edu.sg/dcc/">Design for Climate and
        Comfort Lab</a> | <a
        href="http://asd.sutd.edu.sg/faculty/j-alstan-jakubiec/">profile</a>
      | <a href="http://diva4rhino.com/">DIVA</a> | <a
        href="http://www.mapdwell.com/en">Mapdwell</a> <br>
      events: <a
href="http://diva4rhino.com/diva-day/diva-day-2015-registration-now-open">DIVA

        Day</a> on daylighting in design, 22-24 October in London | <a
        href="http://diva4rhino.com/diva-day-2015/student-competition">DIVA

        Day Student Competition</a></small><br>
    <br>
    <div class="moz-cite-prefix">On 9/19/2015 4:32 AM, Jones,
      Christopher wrote:<br>
    </div>
    <blockquote
      cite="mid:25F861E695EA99478F9790869A57C7D45E092E10@catormsx02"
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        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">That’s
            great Nick, thanks. 
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img
                id="_x0000_i1027"
                src="cid:part11.08080503.07010603@jakubiec.net"
                alt="cid:image003.png@01D09C46.E75BA0D0" height="43"
                width="108"></span><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1C467A"><o:p></o:p></span></b></p>
          <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1C467A">Christopher
                Jones,</span></b><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"></span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P.Eng.<i>
                <br>
              </i></span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">Senior Engineer<b><o:p></o:p></b></span></p>
          <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
                lang="EN-CA"><o:p> </o:p></span></b></p>
          <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
                lang="EN-CA">WSP Canada Inc.<o:p></o:p></span></b></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">2300 Yonge Street, Suite 2300<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">Toronto, ON M4P 1E4</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#595959"
              lang="EN-CA"><br>
            </span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">T +1 416-644-4226<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">F +1 416-487-9766<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">C +1 416-697-0056<o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA"><a moz-do-not-send="true"
                href="http://www.wspgroup.com/">www.wspgroup.com</a>
            </span><i><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#565656"
                lang="EN-CA"><o:p></o:p></span></i></p>
        </div>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #B5C4DF
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
                Nicholas Caton [<a class="moz-txt-link-freetext" href="mailto:ncaton@catonenergy.com">mailto:ncaton@catonenergy.com</a>]
                <br>
                <b>Sent:</b> Friday, September 18, 2015 3:59 PM<br>
                <b>To:</b> Jones, Christopher;
                <a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
                <b>Subject:</b> RE: [Bldg-sim] Radiance Materials
                database<o:p></o:p></span></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">Here’s
            one good set of tables to start with – you’ll find google is
            your friend to look up specific material/product
            properties. 
          </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"><a
              moz-do-not-send="true"
href="http://www.uncg.edu/iar/elight/learn/determine/lc_sub/mat_prop.html"><a class="moz-txt-link-freetext" href="http://www.uncg.edu/iar/elight/learn/determine/lc_sub/mat_prop.html">http://www.uncg.edu/iar/elight/learn/determine/lc_sub/mat_prop.html</a></a></span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">As
            a general rule, I was taught for photometrics it’s
            safe/conservative when actual finishes aren’t known to start
            with reflectances of 80-50-20 for ceiling, wall, and floor
            surfaces respectively.  That’s representative of typical
            white ceilings/tile, walls of light-to-medium colors, and
            dark carpet/flooring. 
          </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">Colored/textured
            surfaces can be tricky to estimate.  Sometimes it’s helpful
            to switch an image or swatch of the color/pattern to
            grayscale to help estimate where on a scale of 0 to 1 the
            reflectance value should lie.  </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">It’s
            also helpful to be aware of some real-world examples to set
            boundaries:
          </span><o:p></o:p></p>
        <p class="MsoListParagraph" style="text-indent:-.25in"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">-</span><span
            style="font-size:7.0pt;color:#002060">         
          </span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">Fresh
            asphalt situates around 5% reflectance (0.05)</span><o:p></o:p></p>
        <p class="MsoListParagraph" style="text-indent:-.25in"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">-</span><span
            style="font-size:7.0pt;color:#002060">         
          </span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">Freshly
            fallen snow reflectance is around 90% (0.90)</span><o:p></o:p></p>
        <p class="MsoListParagraph" style="text-indent:-.25in"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">-</span><span
            style="font-size:7.0pt;color:#002060">         
          </span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">Most
            common building materials and finishes should situate
            between those extremes</span><o:p></o:p></p>
        <p class="MsoListParagraph" style="text-indent:-.25in"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">-</span><span
            style="font-size:7.0pt;color:#002060">         
          </span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">White
            suspended ceiling tiles in particular can range from ~75 to
            90% reflectance, with higher values typically costing a
            premium.  Reflectance is commonly stated on spec sheets and
            sometimes in architectural specifications (that goes for
            most commercial paints as well).</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">I
            hope that helps!</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060">~Nick</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <div>
          <p class="MsoNormal"><b><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#002060">NICK
                CATON, P.E.</span></b><span
style="font-size:11.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><br>
            </span><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#561782">Owner</span></b><o:p></o:p></p>
          <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#561782"> </span></b><o:p></o:p></p>
          <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#561782">Caton
                Energy Consulting</span></b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:black"><br>
            </span><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> 
              306 N Ferrel</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> 
              Olathe, KS  66061</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> 
              office:  785.410.3317</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#561782"><a
                moz-do-not-send="true" href="www.catonenergy.com"><span
                  style="color:#561782"><a class="moz-txt-link-abbreviated" href="http://www.catonenergy.com">www.catonenergy.com</a></span></a></span><o:p></o:p></p>
        </div>
        <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#002060"> </span><o:p></o:p></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
                Bldg-sim [mailto:<a moz-do-not-send="true"
                  href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>]
                <b>On Behalf Of </b>Jones, Christopher<br>
                <b>Sent:</b> Thursday, September 17, 2015 2:50 PM<br>
                <b>To:</b> <a moz-do-not-send="true"
                  href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
                <b>Subject:</b> [Bldg-sim] Radiance Materials database</span><o:p></o:p></p>
          </div>
        </div>
        <p class="MsoNormal"> <o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">I
            am looking for some example materials I can use in a
            Radiance simulation for daylighting calculations for LEED
            v4.  The project is your typical open office concept with
            half-height partitions between work stations.</span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">The
            partitions are a white, translucent material.  The
            workstations are a wood grain laminate, the walls are flat
            off-white, the carpet tiles are a blue-gray color.  I can
            get the colors from photographs of the materials but I am
            not sure how to estimate the reflectance.  Also, I am not
            sure of how to handle the texture of the carpet tiles. 
          </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Thanks
            for any assistance!</span><o:p></o:p></p>
        <div>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img
                id="Picture_x0020_2"
                src="cid:part11.08080503.07010603@jakubiec.net"
                alt="cid:image003.png@01D09C46.E75BA0D0" border="0"
                height="43" width="108"></span><o:p></o:p></p>
          <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1C467A">Christopher
                Jones,</span></b><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"></span></b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P.Eng.<i>
                <br>
              </i></span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">Senior Engineer</span><o:p></o:p></p>
          <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
                lang="EN-CA"> </span></b><o:p></o:p></p>
          <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
                lang="EN-CA">WSP Canada Inc.</span></b><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">2300 Yonge Street, Suite 2300</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">Toronto, ON M4P 1E4</span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#595959"
              lang="EN-CA"><br>
            </span><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">T +1 416-644-4226</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">F +1 416-487-9766</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA">C +1 416-697-0056</span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA"> </span><o:p></o:p></p>
          <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"
              lang="EN-CA"><a moz-do-not-send="true"
                href="http://www.wspgroup.com/">www.wspgroup.com</a>
            </span><o:p></o:p></p>
        </div>
        <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
        <div class="MsoNormal" style="text-align:center" align="center">
          <hr align="center" size="2" width="100%">
        </div>
        <div>
          <p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Arial","sans-serif";color:gray"><br>
              You are receiving this communication because you are
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        You are receiving this communication because you are listed as a
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        intended only for the use of the individual or entity to which
        it is addressed, and may contain information which is
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        WSP provides professional land surveying services through the
        following entities: WSP Surveys (AB) Limited Partnership and WSP
        Surveys (BC) Limited Partnership
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      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
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</pre>
    </blockquote>
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