mattpharr - Network

My new favorite dishtowel. (Only noticed after the purchase.)

My new favorite dishtowel. (Only noticed after the purchase.)

Happy to report that the full contents of the 4th edition of Physically Based Rendering are now freely available online:...

Happy to report that the full contents of the 4th edition of Physically Based Rendering are now freely available online: https://pbr-book.org/4ed/contents

More constructively, Higham's book "Accuracy and Stability of Numerical Algorithms" has a nice discussion of the ways that...

More constructively, Higham's book "Accuracy and Stability of Numerical Algorithms" has a nice discussion of the ways that randomly sprinkling in FMAs can cause trouble. The sidebar on FMA in this summary article of his has some simple examples that illustrate the problem: https://nickhigham.files.wordpress.com/2021/04/high21m.pdf

Given u in [0,1), what is the range of values returned by f?float f(float u) { return (u * 600000) - int(u * 600000);}with clang-14's...

Given u in [0,1), what is the range of values returned by f?

float f(float u) {
return (u * 600000) - int(u * 600000);
}

with clang-14's new default, "yolo let's randomly use FMAs if we feel like it even though you didn't enable fast-math", you can get negative values. 👏 👏 👏

With England's Colossus rebuild, nary another visitor. https://www.tnmoc.org/colossus

With England's Colossus rebuild, nary another visitor. https://www.tnmoc.org/colossus

So I visited the Sponza Atrium... (Blog post with details: https://pharr.org/matt/blog/2023/07/10/sponza-atrium)

So I visited the Sponza Atrium... (Blog post with details: https://pharr.org/matt/blog/2023/07/10/sponza-atrium)

More fun making deterministic things stochastic with Marcos Fajardo, here with noise functions:...

More fun making deterministic things stochastic with Marcos Fajardo, here with noise functions: https://diglib.eg.org/handle/10.2312/sr20231141

...look what showed up in the mail today. 🎉 It's about as thick as the previous editions but with slightly bigger pages so we could...

...look what showed up in the mail today. 🎉

It's about as thick as the previous editions but with slightly bigger pages so we could fit all the new stuff in. Very happy with the print quality.

So about that 4th edition of Physically Based rendering... The book is now in the hands of the printer and we have a solid date of March 23...

So about that 4th edition of Physically Based rendering... The book is now in the hands of the printer and we have a solid date of March 23 2023 for books to be on shelves.

In the meantime we have posted PDFs of two full chapters--the ones on volumetric light transport, featuring all the latest null scattering goodness as well as two new complex and challenging scenes to render in the pbrt-v4-scenes repository.

Blog post with links and further details: https://pharr.org/matt/blog/2022/12/22/pbr-4ed

"I'll outshine you, with my global illumination" 😂

"I'll outshine you, with my global illumination" 😂

I heard of a ChatGPT lisp/c++ rap battle so tried the obvious: "write a rap battle between a monte carlo renderer and a triangle...

I heard of a ChatGPT lisp/c++ rap battle so tried the obvious: "write a rap battle between a monte carlo renderer and a triangle rasterization engine". A+ work, right there.

Not that this is *at all* a problem when you've been using preview for weeks to annotate corrections to page proofs and just discover it...

Not that this is *at all* a problem when you've been using preview for weeks to annotate corrections to page proofs and just discover it now..