Greg I'd completely forgotten about this issue & was reminded by a colleague recently as he was seeing this issue intermittently. He's provided me an archive which I've uploaded to http://upload.iesve.com/downloads/radiance_issues/ghost_luminaire2.zip It should contain - Monday.rad, Monday_mod.rad Luminaire Files - DULCET1203WW.* Parameter file - Monday.rdp (with -dt = 0.025 and -dc = 0.95) View file - Monday.rdv Octree file - image5.oct Pic file - image5.pic (with ghost luminaire)
We're running on Windows 7 x64. The radiance code I used to build from source is a few months old (mid-September IIRC) as I haven't had time to re-download & re-run Cmake etc. if there's been any updates since then. Thanks, Palbinder Sandher Software Platform Engineer T: +44 (0) 141 945 8500 F: +44 (0) 141 945 8501 http://www.iesve.com **Design, Simulate + Innovate with the <Virtual Environment>** Integrated Environmental Solutions Limited. Registered in Scotland No. SC151456 Registered Office - Helix Building, West Of Scotland Science Park, Glasgow G20 0SP Email Disclaimer -----Original Message----- From: Gregory J. Ward [mailto:[email protected]] Sent: 01 November 2012 16:33 To: code development Subject: Re: [Radiance-dev] The curious case of the Ghost Luminaire Hi Pally, I don't know who or what is setting your rendering parameters, but they are not something I would recommend. The "rad" program is a good way to get sane rendering options if you don't like the defaults. Setting -dt .25 -dc .35 is causing the strange contours around your light sources as well as numerous other inaccuracies. You are telling Radiance that you are fine with 25% error in the direct calculation, meaning everything else is worse. The ghosts you are seeing are due most likely to a glazing surface that extends over your wall surface(s). I can't tell you for sure because the zip file you uploaded doesn't contain a complete model -- there are many referenced files that are missing. What system are you using to assemble all this? -Greg > From: Pally Sandher <[email protected]> > Date: November 1, 2012 9:15:20 AM PDT > > Hi, > We've noticed some strange "ghost" luminaires in Radiance 4.2 (nothing to do > with Halloween yesterday). > I've uploaded a file with a sample .pic file and the files used to generate > it at http://upload.iesve.com/downloads/radiance_issues/ghost_luminaire.zip > > As you can see from the .pic file there's a "ghost" luminaire to the centre > left of the image which appears to be generated by the luminaire visible in > the centre of the image (turning off the others while leaving it on still > shows the ghost while vice-versa doesn't). Rotating the view to the right > also removes the "ghost". > The commands we're running to generate the image are as follows: > > oconv -f Monday.map Monday.rad > ghost_lum.oct > rpict -w -t 2 -vtv -vp 6.300 8.100 1.800 -vd -2.800 -3.600 0.000 -vu 0 0 1 > -vh 80.000 -vv 60.000 -x 1600 -y 1600 -x 64 -y 64 -ps 6 -pt 0.100 -pj 1.0 -dj > 0.350 -ds 0.300 -dt 0.250 -dc 0.350 -dr 2 -dp 128 -st 0.500 -ab 2 -aa 0.150 > -ar 64 -ad 128 -as 64 -lr 6 -lw 0.005 -av 0.000 0.000 0.000 -af temp.amb > ghost_lum.oct >amb.raw > rpict -w -t 2 -vtv -vp 6.300 8.100 1.800 -vd -2.800 -3.600 0.000 -vu 0 0 1 > -vh 80.000 -vv 60.000 -x 1600 -y 1600 -ps 6 -pt 0.100 -pj 1.0 -dj 0.350 -ds > 0.300 -dt 0.250 -dc 0.350 -dr 2 -dp 128 -st 0.500 -ab 2 -aa 0.150 -ar 64 -ad > 128 -as 64 -lr 6 -lw 0.005 -av 0.000 0.000 0.000 -af temp.amb ghost_lum.oct > >ghost_lum.raw > pfilt -m 0.25 -x /2 -y /2 ghost_lum.raw >ghost_lum.pic > > If anyone has a few minutes to run this image on their systems & let me know > if the "ghost" luminaire also appears for you it would be most appreciated > (I'm using Radiance HEAD built from source on Windows 7 SP1). > > Thanks, > > Palbinder Sandher > Software Platform Engineer > T: +44 (0) 141 945 8500 > F: +44 (0) 141 945 8501 > http://www.iesve.com _______________________________________________ Radiance-dev mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/radiance-dev _______________________________________________ Radiance-dev mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/radiance-dev
