Search found 18 matches

by XMAMan
Sat Jun 15, 2019 8:39 pm
Forum: Visuals
Topic: My first Supersize-Image
Replies: 11
Views: 4980

Re: My first Supersize-Image

Step 2: Rayleigh- and Mie-Scattering. For Rayleigh-Phase-Function-Direction-Sampling I used 'Importance sampling the Rayleigh phase function from jeppe' (Inverse CDF) For the Mie I use tabulation and the formula from 'ScratchAPixel Simulating the Colors of the Sky' For distancesamling, I use Raab-Wo...
by XMAMan
Fri May 03, 2019 3:45 am
Forum: Visuals
Topic: My first Supersize-Image
Replies: 11
Views: 4980

Re: My first Supersize-Image

Ok here is my first little step to subsurface scattering. I have extended my bidirectional pathtracing with Homogen-Media-Support. So I have now a unbiased estimator. The next steps will be Rayleigh,Mie-Scattering and inhomogeneous media.
by XMAMan
Thu Mar 28, 2019 5:12 am
Forum: Visuals
Topic: My first Supersize-Image
Replies: 11
Views: 4980

Re: My first Supersize-Image

I have used a sphere-light far away from the window instead a plain surface-light nearby the window. This leads to better shadows on the ground now.
by XMAMan
Thu Mar 21, 2019 2:39 pm
Forum: Visuals
Topic: My first Supersize-Image
Replies: 11
Views: 4980

Re: My first Supersize-Image

Here is my microfacet-Test-Image.

This is the isotrophic-ggx-normaldistirbution from walter
Microfacet-Walter.jpg
Microfacet-Walter
Microfacet-Walter.jpg (222.58 KiB) Viewed 329 times
and this is the anisotrophic-ggx-noormaldistribution from eric heitz, where I have sampled the visible normals
https://hal.inria.fr/hal-00996995v1/document
Microfacet-Heiz.jpg
Microfacet-Heitz
Microfacet-Heiz.jpg (221.06 KiB) Viewed 329 times
by XMAMan
Tue Mar 19, 2019 6:05 pm
Forum: Visuals
Topic: My little path tracer
Replies: 28
Views: 12643

Re: My little path tracer

Thanks alot for your detailed answer. This will help to get a good start. At the moment I use the Sampling-Technik from Eric Heitz descripted in this paper: https://hal.inria.fr/hal-00996995v1/document The Paper from your link is then the next step. But at the moment I'm more interested in Subsurfac...
by XMAMan
Mon Mar 18, 2019 2:44 pm
Forum: Visuals
Topic: My little path tracer
Replies: 28
Views: 12643

Re: My little path tracer

He dawelter, can you say me, on which paper is the budda(Subsurface Scattering) based on? I want also to enter in this topic. If you have questens to walters microfacet, than ask me^^ I have implemented it in my Raytracer. For me was the big problem with numerical issues in the ggx-normaldistributio...
by XMAMan
Sun Mar 03, 2019 5:13 pm
Forum: Visuals
Topic: My first Supersize-Image
Replies: 11
Views: 4980

Re: My first Supersize-Image

The difference between a Motionlight and a Arealight is, that if you want create a LightSub-Path, starting from this lightsource, than you have to create first the point on the lightsource and than you must move that created point randomly on a given Line (the motionline from the lightsource). Or if...
by XMAMan
Mon Feb 25, 2019 2:34 pm
Forum: Visuals
Topic: My first Supersize-Image
Replies: 11
Views: 4980

Re: My first Supersize-Image

Here is my newest implementation: A lightsource with motionblure-effekt.

Image
by XMAMan
Mon Jun 18, 2018 4:56 pm
Forum: Visuals
Topic: My first Supersize-Image
Replies: 11
Views: 4980

Re: My first Supersize-Image

Some other Pictures:

Image
Image
Image
Image
by XMAMan
Mon Jun 18, 2018 4:46 pm
Forum: Visuals
Topic: My introduction
Replies: 11
Views: 4424

Re: My introduction

My Raytracer is CPU-Based. I dont have the PBRT book but I think its worth to buy it. I learn all the thinks from the Papers at the moment(Eric Veach and Jaroslav Křivánek are my favorit authors). So my Raytracer can VCM/Radiosity/Bidirectional PathTracing but my Bsdf-Stuff is only rudimentary. I wi...