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Matt, Greg, and I are super-excited to release a free online edition of the Physically Based Rendering Book with hyperlinked cross-referencing, beautiful SVG figures and equations as well as interactive image comparisons. The details of how all of this came to be are explained in the preface to the online edition. (http://www.pbr-book.org/3ed-2018/Preface_to_the_Online_Editi...)


Is there a place to report issues?

In section 2.9.1 Quaternions, 4th paragraph reads as if it's missing an equation for the second representation of a quaternion:

  A quaternion can be represented as a quadruple [EQ present] or as [EQ missing] , where is an imaginary 3-vector and  is the real part. We will use both representations interchangeably in this section.
This is what it looks like for me:

https://imgur.com/a/3Mfanma


Nice find!

In general, you can send errata/bugs to authors@pbrt.org, but we got this one. :-)

It looks like an equation that MathJax wasn't happy with. I've got it fixed now and will include that fix in a push to the site in a little bit.

If you want to be listed as something other than "OnACoffeeBreak" in the errata credits, send me an email (matt@pharr.org).

Thanks again!


There’s a typo in the second sentence on the landing page, a redundant “the”:

> where the an accurate modeling


Thanks! Also fixed and will also go live in a little bit.


Fantastic news and amazing work, the site looks beautiful! I love my copy of PBR but it's always been a tad on the heavy side for casual reading :)

The image viewer works brilliantly and the renders are looking gorgeous. Looking forward to spending some hours with this on my iPad later.


Thank you, this is fantastic news! PBR has always been one of my favorite textbooks.

Your road map says:

> We plan to release updated versions of the book roughly once a year, starting a year or so from now.

Out of curiosity, do you guys still plan to release new print editions?


Thanks! We'd love to have a new print edition at some point in the future, but the details of this are yet to be determined.


Really great work. I think this book has been exceptionally valuable to many people over a long period of time, and likely raised the overall level of raytracing knowledge among graphics programmers by a large amount.


Awesome, I just recently bought both the print and eBook editions as I start to dive into DirectX ray tracing, this looks like it will be a great complement!


This is amazing! Thank you.

I still buy physical books rather than e-books, but I always thought that hyperlinks were a great part of a reading experience as well.




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