Questions tagged [scattering]
5 questions
15
votes
1 answer
Radiosity VS Ray tracing
Radiosity is basically what allows this:
In a tutorial of Cornell University about Radiosity it is mentioned that:
A ray-traced version of the image shows only the light reaching the viewer by direct reflection -- hence misses the color…
Armfoot
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12
votes
1 answer
Volumetric rendering fundamental concepts and terminology
Literature on rendering volumetric materials and effects tends to use a lot of mathematical physics terminology. Let's say that I have a decent handle on the concepts involved in surface rendering. What concepts do I need to understand for…
John Calsbeek
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10
votes
1 answer
How does Smith multiple scattering interact with diffuse subsurface scattering?
The Multiple Scattering Microfacet BSDFs with the Smith Model paper describes a statistical model for replacing the masking-shadowing functions in microfacet BSDFs (which account for paths with more than one surface intersection by setting their…
John Calsbeek
- 3,882
- 19
- 31
3
votes
0 answers
Predicting reflectance functions from complex surfaces
There are three principal ways to obtain a BRDF. We can
Derive an analytic formula using physical principles
Use simulation given an assumed or measured model of the surface
microgeometry
Measure the BRDF based on empirical observation
A number of…
Arjan Singh
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1
vote
0 answers
Adding Ozone to my sky simulation
I implemented a simulation for the colour of the sky a while ago by following the scratch a pixel tutorial: https://www.scratchapixel.com/lessons/procedural-generation-virtual-worlds/simulating-sky
I adapted it for the actual sun position and am…
Maria
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