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Results tagged with global-illumination
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user 6041
3
votes
0
answers
290
views
Beer's law in dielectric material
I am trying to implement Beer's law according to this page in dielectric material but I am not sure have done it correctly as the image does not suggest so.
The formula is: I(s) = I(0) * pow(e, ln(A) …
- 750
10
votes
1
answer
859
views
Using Monte carlo on Rayleigh scattering
Update
I am editing and posting this question in a different way; this time from the point of view of Nishita paper.
Sunlight gets scattered at P and attenuated before reaching Pv. Therefore inten …
- 750
2
votes
0
answers
488
views
How to simulate specular reflection in Light Tracing?
I am implementing light tracing from this website.
The right wall on the below image is perfect mirror(specular reflection). Its BRDF returns zero that's why it's been rendered black. But how is it t …
- 750
5
votes
1
answer
1k
views
Efficiently sampling specific surfaces using MIS in path tracing
Apologies for posting two questions in one post, but as they are relevant I kept them in one.
Question 1
In the definition of multi sample estimator that Veach has defined, the integrand is the same …
- 750
2
votes
0
answers
162
views
Picking multiple light sources from a mixture densities
According to Peter Shirely paper, one pdf(probability density function) can be defined for the union of the light sources and pick only one using a random number from this density:
$$p(x) = \alpha_1 …
- 750
6
votes
1
answer
699
views
How Sunlight is added in Bidirectional Path tracing?
How is distant directional light source(like sun) added in BDPT?
If this is an indoor scene that gets sunlight through windows, how is this handled in BDPT(other than to consider Sun as a big disc far …
- 750