Spectral Ray Tracing
larswander.com
Spectral Ray Tracing
1–10 of 45 posts
Re: Spectral Ray Tracing
#2Lovely. Not sure if the author would agree... There was much to love and hate about the nascent "new aesthetic" movement, but this demonstrates the best of that genre.
Re: Spectral Ray Tracing
#3A great spectral ray tracing engine is LuxRender : https://luxcorerender.org/ (the older one, that is - the newer LuxCore renderer does not have full spectral support)
Beyond the effects shown here, there are other benefits to spectral rendering - if done using light tracing, it allows you to change color, spectrum and intensity of light sources after the fact. It also makes indirect lighting much more accurate in many scenes.
Re: Spectral Ray Tracing
#4The beauty of mathematics and physics in action. I wonder if some of the tweaks made for the sake of beauty could be useful in other means of visualizations.
It also reminds me of a time that I was copying code from a book to make polyphonic music on an Apple II. I got something wrong for sure when I ran it, but instead of harsh noise, I ended up with an eerily beautiful pattern of tones. Whatever happy accident I made fascinated me.
Re: Spectral Ray Tracing
#5If anyone wants to make their own: The free e-book Ray Tracing Gems II [1] covers realtime GPU ray tracing with modern APIs and hardware acceleration, and has a chapter about spectral rendering (Chapter 42: Efficient spectral rendering on the GPU for predictive rendering).
Re: Spectral Ray Tracing
#6Does anyone know if someone has attempted real time spectral rendering? I've tried finding information before but have never had any luck.
Re: Spectral Ray Tracing
#7Spectral rendering imho is good example how ray tracing in itself is not the end-game for rendering, it's more just starting point. Occasionally I see sentiment that with real-time ray tracing rendering is a solved problem, but imho it's far from truth.
Afaik most spectral rendering systems do not do (thin-film) interference or other wave-based effects, so that is another frontier. Reality has surprising amount of detail.
Re: Spectral Ray Tracing
#8> I’ve been curious what happens when some of the laws dictating how light moves are deliberately broken, building cameras out of code in a universe just a little unlike our own. Working with the richness of the full spectrum of light, spectral ray tracing has allowed me to break the rules governing light transport in otherworldly ways.
This reminds me of diagnosing bugs while writing my own raytracer, and attempting to map the buggy output to weird/contrived/silly alternative physics
Re: Spectral Ray Tracing
#9Are there any good resources for spectral ray tracing for other frequencies of light, e.g. radio frequencies?
Re: Spectral Ray Tracing
#10If you want to go all the way, you have to track not only the wavelength of each ray, but also its polarization and phase. The situations in which these properties actually matter for human perception are rare (e.g., thin films and diffraction gratings), but they exist.