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It looks like all the ray tracing renders I found online uses bump mapping, including me tuba mitsuba, PDRT and in all of the graphics courses taught at the Universies too.however real-time graphics uses normal mapping which is supposed to be better than bump mapping in terms of the ability to pertu...

Hi Matt, Really looking forward to the book! I took a brief at what you updated in v3, and it looks like some of the recent advances in gradient domain integrators have not been included. Such as gradient path tracing and bidirectional path tracing. I personally feel like these are really impactful ...

Hi all, I am trying to render material preview images like this with my own renderer: http://blenderartists.org/forum/attachment.php?attachmentid=326162&d=1407755382 And right now I am lack of two things. The good looking tiled texture on the floor, and some ball mesh like that to apply the mate...

I understand that BDPT is one of the estimators used in your latest UPBP, so is this joint sampling used in that framework as well? The joint importance sampling techniques weren't actually used there (couldn't do it on time), but they can certainly be added to improve sampling. Thanks for the info...

Unfortunately, there is no public implementation available, due to potential legal problems (the work was done at Disney Research). However, implementing the analytical importance sampling routines is actually quite easy. For this what you really need are the boxed equations in section 5. The tabul...

Hi, just want to ask is there an implementation of this publicly available anywhere?
I wish to implement this in my renderer and a reference would be really handy.

Recently I am very interesting in this Joint Importance Sampling: http://www.ci.i.u-tokyo.ac.jp/~hachisuka/jis.pdf It seems to reduce the variance of volume rendering a lot. But it looks quite complicated to implement, especially when considering the tabulation in anisotropic phase function. So is t...

Hi, I am insterested in how Krakatoa renders the volumetric effect just with particles. It seems to be splatting particles to the framebuffer directly. But it also does some kind of volume scattering. Any one know how exactly the algorithm works? Any papers, books, docs on this? Here's the link to t...

Maybe, not sure how the math works.

I think it should depend on the fov, film resolution.

Hi,

I am writing to ask about the ray differentials for primary rays if they don't hit anything.
I still need the differentials info to sample environment map, but how should the differentials be calculated?

Thanks