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Results tagged with brdf
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user 13321
3
votes
BRDF that interpolates between diffuse, glossy and reflective?
Although microfacet bxdfs do this to some degree, a roughness of 1 is not really the same as a diffuse.
I don't know of any single lobe which can properly blend between them. You would probably have t …
- 529
1
vote
How to find the importance sampling function for a specified BRDF?
PBRT3 is a really good resource and has a lot of brdfs in it. The book and source code are available for free online.
Regarding oren-nayar, from what I can gather they are just using cosine weighted h …
- 529
1
vote
BRDF for point lights should not return values over 1
For a BRDF the integral over the hemisphere must be less than 1 for energy conservation.
If you consider a specular brdf there is only one direction, where brdf > 0 and all other directions return 0. …
- 529
1
vote
Understanding of Microfacet monte-carlo path tracing
Some more clarity on the fresnel.
F tells you how much light is reflected, and (1 - F) therefore tells you how much light is transmitted through the layer/material/surface.
Generally we put fresnels …
- 529
2
votes
How can I make the simplest physically based mixed specular-diffuse BRDF (and how to properl...
A common way of combining diffuse and specular brdfs is by using a fresnel equation.
Essentially, for some specular materials, the amount reflected and transmitted (passed through the object) depends …
- 529