Questions tagged [specular]
The specular tag has no usage guidance.
39
questions
8
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4
answers
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Should ideal specular multiply light colour with material colour?
Ideal specular reflection is like a perfect mirror. I'm looking at the code to SmallPt and see that one of the spheres has an ideal specular material:
...
- 700
2
votes
1
answer
449
views
Bug: Overly Sharp Highlights in PBR
I'm still working on my BRDF equations. Theoretically, all equations are correct, but the hilights are super sharp. I'm not sure if this is a result of me not using Image-Based Lighting (I currently ...
3
votes
1
answer
835
views
How to create specular surface in Mitsuba Renderer
I am a newbie in computer graphics and I am trying to develop a special case of path tracing really slowly! But first: I came up studying the Mitsuba renderer and one of its uses in the so-called GDPT ...
- 355
4
votes
1
answer
116
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Data fitting SVBRDF with L-M
I am reading two shot svbrdf capture . I want to understand the data fitting.
For example, I have my input image 3000x2000 pixels, and I divide it to create my source tiles of 192x192 pixels. The way ...
- 149
23
votes
2
answers
8k
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How to properly combine the diffuse and specular terms?
As far as I understand, in a BRDF the Fresnel term is telling us the probability for a photon to be reflected or refracted when it hits a surface.
The reflected photons will contribute to the ...
- 4,420
2
votes
1
answer
720
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phong equation of illumination specular component
I'm stuck on this question asking me to calculate the intensity of a pixel using Ray Tracing. It gives values such as $I_i$ but doesn't give any coordinates.
I know for the diffuse component, $...
- 157
5
votes
1
answer
425
views
Should not specular reflection on a rough surface be similar to diffuse reflection?
Different BRDFs are usually used to compute diffuse and specular reflection.
Some of the most often used include for example the Lambert BRDF for diffuse reflection and the Cook-Torrance BRDF for ...
- 1,861
18
votes
2
answers
7k
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What is the accepted method of converting shininess to roughness, and vice versa?
Most modern renderers use physically-based materials and their models are often parameterized over roughness. Since this wasn't always the case with renderers, conventional assets often don't have a ...
- 2,214
10
votes
1
answer
912
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Trying to implement Microfacet BRDF but my result images are wrong
I am trying to implement microfacet BRDF model. I am reading Sebastien Lagarde's slides. I implemented formulas to my code but i think result image is wrong.
Yellow is base color of material. ...
- 131