behind the scenes detailed manual

radiance-general
1

Hi,

I'm currently trying to understand what's going on behind the scenes of the radiance calculations. Can someone suggest a paper or manual which describes in detail how radiance calculates luminance / illuminance values from a given light source type and IES luminous intensity distribution file in a certain scene?

Thanks and best regards
Jan Winter

2

Maybe this is on the right track?
http://radsite.lbl.gov/radiance/papers/sg94.1/paper.html

Or maybe some of the others listed at:
http://radsite.lbl.gov/radiance/framer.html

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3

The Radiance calcuations are covered in Greg's papers on Radiance, many of what you can find on his web site at <http://anyhere.com/gward/papers.html>. A tutorial overview is given in the book *Rendering with Radiance* which you can buy from, well, me--e-mail if you are interested.

For the specifics of the IES light source calculations the code, I think, is the best reference. Look in the ies2rad man page, ies2rad.c, and source.cal.

···

--
Randolph M. Fritz

On 2011-12-14 12:01:16 +0000, Winter, Jan-Christoph said:

Hi,

I'm currently trying to understand what's going on behind the scenes of the radiance calculations. Can someone suggest a paper or manual which describes in detail how radiance calculates luminance / illuminance values from a given light source type and IES luminous intensity distribution file in a certain scene?

Thanks and best regards
Jan Winter

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4

Hi Randolph and Christoph,

thanks for your feedback.

I have the "Rendering with Radiance" book and also read a lot of tutorials and have a understanding of how to render with radiance, but a lot of the important stuff is fragmented within several places.

I was just wondering if there were a short overview (with graphics) which describes in detail what is going in detail, but it seems like I have to digg deeper and sort the puzzle...

Best regards
Jan

The Radiance calcuations are covered in Greg's papers on Radiance, many
of what you can find on his web site at
<http://anyhere.com/gward/papers.html>. A tutorial overview is given
in the book *Rendering with Radiance* which you can buy from, well,
me--e-mail if you are interested.

For the specifics of the IES light source calculations the code, I
think, is the best reference. Look in the ies2rad man page, ies2rad.c,
and source.cal.

···

--
Randolph M. Fritz

5

Hi Randolph and Christoph,

thanks for your feedback.

You're welcome.

I have the "Rendering with Radiance" book and also read a lot of tutorials and have a understanding of how to render with radiance, but a lot of the important stuff is fragmented within several places.

I was just wondering if there were a short overview (with graphics) which describes in detail what is going in detail, but it seems like I have to digg deeper and sort the puzzle...

Try my thesis at http://dmg.be.washington.edu/xmlsiteengine/browsers/static/publication222.html - I covered some of the ground there. After that, the code and this list is the resource.

I'm going on vacation, and won't be answering questions for a week or so, but will do so afterwards.

Randolph

···

On 2011-12-15 14:25:15 +0000, Winter, Jan-Christoph said:

6

Dear Randolph,

thanks for the link to your thesis. It looks like that it covers again some of the missing links for my current puzzle :slight_smile:

Enjoy your vacation and best regards
Jan

Hi Randolph and Christoph,

thanks for your feedback.

You're welcome.

I have the "Rendering with Radiance" book and also read a lot of
tutorials and have a understanding of how to render with radiance, but
a lot of the important stuff is fragmented within several places.

I was just wondering if there were a short overview (with graphics)
which describes in detail what is going in detail, but it seems like I
have to digg deeper and sort the puzzle...?

Try my thesis at
http://dmg.be.washington.edu/xmlsiteengine/browsers/static/publication222.html
- I covered some of the ground there. After that, the code and this
list is the resource.

I'm going on vacation, and won't be answering questions for a week or
so, but will do so afterwards.

Randolph