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Results tagged with volumetric-scattering
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user 19537
1
vote
1
answer
40
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Sampling scattering direction around directions other than the last ray direction
In a path tracer, if we want to sample a ray direction in scattering medium, we can use phase function sampling, which actually use the direction of the ray before sampling as a sort of anchor to samp …
- 1,302
1
vote
0
answers
61
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Term confusion about volume scattering
We have two different terms, for example, let's talk about scattering only.
Scattering coefficient
Scattering cross-section
These two terms are supposed to have different physical meaning. I read it …
- 1,302
2
votes
0
answers
48
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How to properly use scattering coefficient during volumetric path tracing?
The increased radiance during sampling is known by:
$$
L_s = L_e + \sigma_s \int p(w, w')f_p(w, w')dw'
$$
The latter part, which accounts for in-scattering radiance bears a $\sigma_s$ in it.
The firs …
- 1,302