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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>Hi everyone,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>does anyone have experience with the following or are there known
issues on shading in this regard?</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt'><font size=2
face=Arial><span lang=EN-GB style='font-size:10.0pt'>(1)<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></font><span lang=EN-GB>We have a model with horizontal,
staggered obstructions outside. The initial model faced south (the façade is
not vertical). Here, the shading calcs seem to be O.K. (shading patterns with
shd etc.).</span></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt'><font size=2
face=Arial><span lang=EN-GB style='font-size:10.0pt'>(2)<font size=1
face="Times New Roman"><span style='font:7.0pt "Times New Roman"'>
</span></font></span></font><span lang=EN-GB>We then turned the model (and the
obstructions) to the southwest (-60 deg, actually). The wireframe looks O.K.,
the shading calcs with shd do not work, anymore: Every relevant obstruction
suddenly has the “plane crossing” problem and is therefore ignored.
Test with turning obstructions by 300 deg instead of -60 didn’t help. The
lower edge of the relevant surfaces is parallel to the ground in both
orientations …</span></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>Thanks for any ideas!</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>Best regards,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'>Achim Geissler</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB style='font-size:
10.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-GB> </span></font></p>
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