Questions tagged [pbrt-v3]

I want to plot the Gaussian filter of pbrt-v4 with a radius $(100,100)$ and a standard deviation ($\sigma$) of $0.5$. I would expect something like this: When I plot the pbrt-v4 Gaussian filter with radius $(100,100)$ and $\sigma=0.5$ I get: Is…

The specific chapter about this is here - Sampling Theory Unlike what I read anywhere else, it defines Shah as: $$Ш_T(x)=T\sum\nolimits_i{\delta{(x-Ti)}}$$ And the T is still present in the reconstructed function:…

Why does the equation at the bottom of the following page hold? http://www.pbr-book.org/3ed-2018/Monte_Carlo_Integration/Transforming_between_Distributions.html $p(\theta,\phi)d\theta d\phi=p(\omega)d\omega$ Is this a conclusion of probability and…

In PBRT-V3, the light has following spectrum in scene file(Note that the scene file is not come from PBRT itself): "spectrum" [400.0 0.0 500.0 8.0 600.0 15.6 700.0 18.4] then it's converted to following RGB in C++: "rgb" [20.7467213 10.8233843…