ompf2.com

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.

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.

Here is my microfacet-Test-Image.

This is the isotrophic-ggx-normaldistirbution from walter and this is the anisotrophic-ggx-noormaldistribution from eric heitz, where I have sampled the visible normals
https://hal.inria.fr/hal-00996995v1/document

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...

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...

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...

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

Some other Pictures:

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...

Thanks for your reply ardook.

I think my next task in my Raytracer will be the improvement of the BSDF-Stuff and your answer is a good startingpoint for me.