Search found 8 matches

by joulsoun
Fri May 20, 2016 11:30 am
Forum: General Development
Topic: How to measure "real" material for rendering
Replies: 11
Views: 10967

Re: How to measure "real" material for rendering

Ah, now I got it! Thanks!
by joulsoun
Thu May 19, 2016 8:24 am
Forum: General Development
Topic: How to measure "real" material for rendering
Replies: 11
Views: 10967

Re: How to measure "real" material for rendering

Thanks for the answer! Got you on the aperture size, but still not sure if I understand if it is possible to change the inclination angle of the light source in a conoscopic device. Looking at the schematic on your page, it looks like the beamsplitter always directs the light source straight at the ...
by joulsoun
Tue May 17, 2016 5:46 am
Forum: General Development
Topic: How to measure "real" material for rendering
Replies: 11
Views: 10967

Re: How to measure "real" material for rendering

We're very close to snagging an imaging sphere, so I'm curious about how a conoscopic scatterometer deals with light sources? If we want to measure the reflectance with a number of light source angle increments. We also have non-optically smooth surfaces that we measure, things that are really rough...
by joulsoun
Mon Oct 13, 2014 8:54 am
Forum: General Development
Topic: Confused about Shifted Gamma micro-facet distribution
Replies: 0
Views: 8981

Confused about Shifted Gamma micro-facet distribution

Hi, I've been studying the paper 'Accurate fitting of measured reflectances using a Shifted Gamma micro-facet distribution' a couple of times now: http://hal.inria.fr/docs/00/70/23/04/PDF/paper.pdf I stumbled upon a peculiarity today when thinking about measuring data. The paper states that two slic...
by joulsoun
Fri Oct 03, 2014 9:02 am
Forum: General Development
Topic: Experimental Development Framework (C++ and ray tracing)
Replies: 12
Views: 10220

Re: Experimental Development Framework (C++ and ray tracing)

It looks quite nice indeed, however it just seems to me it already does it all... so not much learning for me to be done :) If you intend to research new areas of algorithmically optimizing a renderer, it makes sense to start from an already mature renderer. In my experience, you'll be more likely ...
by joulsoun
Wed Oct 01, 2014 1:57 pm
Forum: General Development
Topic: Experimental Development Framework (C++ and ray tracing)
Replies: 12
Views: 10220

Re: Experimental Development Framework (C++ and ray tracing)

Have you considered Mitsuba? Quite popular in research currently, there's a Qt-GUI with a realtime GL renderer, it should be hackable to do what you want. The big points for me is that it is maintained, very readable code, has quite awesome features to be honest, and I managed to build it myself (id...
by joulsoun
Thu Aug 21, 2014 10:32 am
Forum: General Development
Topic: questions about hair rendering
Replies: 5
Views: 4273

Re: questions about hair rendering

Kind of on this topic, I remembered this poster from Siggraph 2012 about very efficient sampling of hair. Not exactly your fit, but a very interesting read nonetheless!

http://research.lighttransport.com/distance-aware-ray-tracing-for-curves/asset/abstract.pdf
by joulsoun
Wed Aug 20, 2014 8:21 am
Forum: General Development
Topic: Comparison of spectral vs rgb rendering?
Replies: 9
Views: 8022

Re: Comparison of spectral vs rgb rendering?

I thought that this paper was very informative as to when spectral rendering makes a difference: A reflectometer setup for spectral BTF measurement - Lyssi [2009] http://cg.cs.uni-bonn.de/en/publications/paper-details/lyssi-2009-btfspectral/ It has very intuitive examples comparing RGB and spectral ...

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