ompf2.com

And this the Mirror-Box. Got the idea from dawelter^^

This is the well known water-cornellbox

In the next Image you can see the difference between single-scattering and multiple-scattering Image 1: Bidirectional Pathtracing (MultipeScattering) Image 2: Sampling a Particle-Point on the Edge from a Eye-Subpaht (Dont know the offizial name from this path-creation-sampling-routine) (MultipeScatt...

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...

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...