Search found 40 matches

by dawelter
Tue Apr 09, 2019 8:44 pm
Forum: Visuals, Tools, Demos & Sources
Topic: My little path tracer
Replies: 28
Views: 12918

Re: My little path tracer

Thanks, knightcrawler! :-) Here is a another 24 h rendering. I had this fun idea to make a flat earth version of the globe figure. :lol: glossytransmissiveflatearth.jpg The dome is filled with a thin, scattering medium. This creates the glow effect around the sun. The image has other details which I...
by dawelter
Wed Mar 27, 2019 9:07 pm
Forum: General Development
Topic: Shading normal issues w. adjoint bsdf
Replies: 7
Views: 1163

Re: Shading normal issues w. adjoint bsdf

Hi Charles, thank you. The link has a typo, but it's clear which paper you mean: "Microfacet-based Normal Mapping for Robust Monte Carlo Path Tracing". The results look really nice. One thing bugs me though. In Figure 18th's caption, the authors state "Our normal-mapping model ... fails the white fu...
by dawelter
Sun Mar 24, 2019 10:04 am
Forum: Visuals, Tools, Demos & Sources
Topic: My little path tracer
Replies: 28
Views: 12918

Re: My little path tracer

@XMAMan you're welcome. Meanwhile, I rendered variations of the Buddha. This time with the new glossy transmissive material. I also added a switch in the material to force a path tracing step instead of getting Li from photons, essentially treating the BSDF as if it was a delta function. No NEE yet....
by dawelter
Tue Mar 19, 2019 9:02 am
Forum: Visuals, Tools, Demos & Sources
Topic: My little path tracer
Replies: 28
Views: 12918

Re: My little path tracer

We know since VCM that photon mapping can be seen as a path sampling method. Therefore, I want to first refer to Raab et al. (2008) "Unbiased Global Illumination with Participating Media" for the concise path integral formulation of volume rendering. I use the stochastic progressive variant of photo...
by dawelter
Fri Mar 15, 2019 7:29 am
Forum: Visuals, Tools, Demos & Sources
Topic: My little path tracer
Replies: 28
Views: 12918

Re: My little path tracer

Hi. Thank you both. Glad you like it. :) Btw., I forgot to say, I rendered the media with "The Beam Radiance Estimate" by Jarosz (2008). I use Embree to do the beam-point query. This is possible since fairly recent support for ray-aligned-disc intersections! So, if you happen read this, Embree devel...
by dawelter
Mon Mar 04, 2019 7:39 pm
Forum: Visuals, Tools, Demos & Sources
Topic: My first Supersize-Image
Replies: 14
Views: 5322

Re: My first Supersize-Image

Oh, forgive me, I missed the motion blur on the fireball even! :o Now I understand. Nice!
by dawelter
Sat Mar 02, 2019 11:06 am
Forum: Visuals, Tools, Demos & Sources
Topic: My first Supersize-Image
Replies: 14
Views: 5322

Re: My first Supersize-Image

No offense, but how is it different from regular area lights?
Anyway, I really like the renderings in your first post. They look good and they are so clean. Good job. Oh and the scene with the crystal man is very cute :-)
by dawelter
Sat Mar 02, 2019 10:57 am
Forum: Visuals, Tools, Demos & Sources
Topic: My little path tracer
Replies: 28
Views: 12918

Re: My little path tracer

Here are some new results from my renderer. I've been messing with photon mapping ... Check if physics are working as intended. The beam is supposed to be focused like that. I let the construction of the scene be guided by the so called Lensmaker's equation https://en.wikipedia.org/wiki/Lens_(optics...
by dawelter
Sun Feb 24, 2019 2:23 pm
Forum: General Development
Topic: Shading normal issues w. adjoint bsdf
Replies: 7
Views: 1163

Re: Shading normal issues w. adjoint bsdf

Doh! :x I was about to file an issue. Instead I got my answer right there ...
https://github.com/mmp/pbrt-v3/issues/209

@Shocker: Yeah ... It's a bit overkill but if I cannot understand the differences between the mesh otherwise, why not. ;-)
by dawelter
Sun Feb 24, 2019 11:30 am
Forum: Visuals, Tools, Demos & Sources
Topic: Glitch Pictures anyone?
Replies: 81
Views: 111781

Re: Glitch Pictures anyone?

Ha ha! Well, it's a manifestation of my wish to render a better looking scene, and I'm not talking about bugs. So I was basically just messing around ;-) The second bug was a too long query beam. Now I call this good enough in spite of the color bleeding below the bunny :roll: box_bunny_medium.jpg