Search found 44 matches

by dawelter
Sat Feb 08, 2020 9:23 am
Forum: Visuals, Tools, Demos & Sources
Topic: My little path tracer
Replies: 29
Views: 13997

Re: My little path tracer

Here is a first result from my attempt to implement path guiding following the "Path Guiding in Production" paper. So far I have surface guiding only. My ingredients are: * KD-tree inspired by "Practical Path Guiding for Efficient Light-Transport Simulation" by Müller et al.(2017) * Gaussian Mixture...
by dawelter
Sat Feb 08, 2020 9:02 am
Forum: Visuals, Tools, Demos & Sources
Topic: My first Supersize-Image
Replies: 22
Views: 7115

Re: My first Supersize-Image

Yes. You are right. Big scene plus directional light is a problem.

Would you spend more time on scenes in general? I believe you have many cool algorithms, but little material to exploit them ;-)
by dawelter
Wed Jan 08, 2020 9:23 pm
Forum: Visuals, Tools, Demos & Sources
Topic: My first Supersize-Image
Replies: 22
Views: 7115

Re: My first Supersize-Image

Hi! This is indeed very impressive, XMAMan! Say, have you tried to render the atmosphere/cloud scene with UPBP? I have to wonder though how well the algorithm copes with "nature" scenes. Btw, @ ultimatemau, thanks for the tip regarding "Path Guiding in Production". I found it's really a great overvi...
by dawelter
Fri Sep 06, 2019 12:15 pm
Forum: Visuals, Tools, Demos & Sources
Topic: My first Supersize-Image
Replies: 22
Views: 7115

Re: My first Supersize-Image

Nice progress! :)
by dawelter
Tue Apr 09, 2019 8:44 pm
Forum: Visuals, Tools, Demos & Sources
Topic: My little path tracer
Replies: 29
Views: 13997

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: 2076

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: 29
Views: 13997

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: 29
Views: 13997

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: 29
Views: 13997

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: 22
Views: 7115

Re: My first Supersize-Image

Oh, forgive me, I missed the motion blur on the fireball even! :o Now I understand. Nice!