Hi Greg, Thanks for your response. I've also tried to run the simulation using mksource default parameters, I obtained this picture but it seems that there is too many sources identified (see finalsceneview02.tif in https://www.dropbox.com/sh/6ra7xtansk8rdz0/z0aG1qlTHr ). I thought that in increasing -d, the problem disappears. In this simulation, I gave the room description but the ground is not specified because I was not sure on how to describe it in IBL. In the following simulation I added the ground in describing it using gensky... I am not sure that it is a good idea (see finalsceneview02.tif in https://www.dropbox.com/sh/4gu3onc08d933ea/xIwc2E9Kc6 ).
In these two folders you also will find the local geometry, the light probe image... Thanks, Beatriz El 20-01-2014, a las 16:28, Gregory J. Ward <[email protected]> escribió: > Hi Maria, > > Thank you for following good list etiquette and posting your image on a > website. You may want to check to be sure that you are subscribed with the > HDRI mailing list <http://www.radiance-online.org/community/mailing-lists>, > as I had to manually pass your post onto the list. We don't seem to have you > in our system, at least not at this address. > > I can't say seeing your light probe which is just shown as white out the > window, but mksource will tend to create multiple sources for long, skinny > regions. Reducing the -d setting will reduce the maximum number of sources > created in this way. Your threshold setting also seems to be quite low, and > you might consider letting mksource determine this threshold automatically. > > The general idea with mksource is to replace only the very brightest regions > in a distant environment map with direct sources. The rest will be handled > well enough in the indirect calculation. Which brings me to my last point -- > are you giving mksource the room description as well as the exterior > environment? It completely ignores the local geometry, using only your > environment map (light probe) to decide where to place sources. Perhaps you > could post that? > > Best, > -Greg > >> From: "María Beatriz Piderit" <[email protected]> >> Date: January 20, 2014 10:36:53 AM PST >> >> Hi all, >> >> I’m trying to extract a concentrated light source from HDR picture of the >> sky using mksource. >> I run the following script: >> oconv materials.mat geometry.rad lightprobe.rad > scene.oct >> mksource -d 1000000 -t 2 -a 5 scene.oct > srcs.rad >> oconv -i scene.oct srcs.rad ground.rad > finalscene.oct >> rpict -vth -vv 180 -vh 180 -vp 1.8 3 1.2 -vd 1 1 0 finalscene.oct > >> finalsceneview.hdr >> ra_tiff finalsceneview.hdr finalsceneview.tif >> My results are weird (see >> https://www.dropbox.com/s/2u4vnsi4ynw0ncz/finalsceneview02.tif) >> Do you have any idea what is wrong? a problem with the capture of the sun? >> or rather a matter of parameters ? >> Is it normal that mksource finds several sources ? (see >> https://www.dropbox.com/s/n7y97ppm1ip1gky/srcs.rad) >> >> Thanks in advance for your help ! >> >> Beatriz Piderit M. >> Arquitecta UBB, MA, PhD UC Louvain >> >> Departamento Diseño y Teoría de la Arquitectura >> Universidad del Bio-Bio Concepción, Chile
_______________________________________________ HDRI mailing list [email protected] http://www.radiance-online.org/mailman/listinfo/hdri
