Questions tagged [physics]
The physics tag has no usage guidance.
6
questions
36
votes
2
answers
6k
views
How physically-based is the diffuse and specular distinction?
The classical way of shading surfaces in real-time computer graphics is a combination of a (Lambertian) diffuse term and a specular term, most likely Phong or Blinn-Phong.
Now with the trend going ...
- 2,293
15
votes
2
answers
2k
views
How to build a decent lens/camera objective model for path tracing?
I have written a small path-tracer after learning and experimenting on smallpt.
The only thing that I did not write (and understood) myself is how the initial rays are computed and fired from the ...
13
votes
4
answers
507
views
What physical properties are “lacking” to keep this 3D scene from looking like a real photograph?
So I know that I'm basically asking to identify the main problem to be solved in creating realistic 3d Graphics, but as someone without much technical experience in the field, I'm curious that if ...
- 885
7
votes
1
answer
1k
views
Resulting Probabilty Density in Path Tracer for paths using Next Event Estimation
I am trying to implement my own Gradient Domain Path Tracer by following the code of this guy who already implemented it:
https://gist.github.com/BachiLi/4f5c6e5a4fef5773dab1
I already managed to ...
- 355
2
votes
2
answers
135
views
Why is the approximation valid, in the formula provided by Brian Karis?
I'm sorry I'm bringing this topic up again, but I need to expound some of the topics.
With reference to this question, I was wondering if someone can help me out in expanding some of the details.
In ...
- 536
0
votes
1
answer
48
views
How to ensure that a randomly-generated velocity vector moves the camera forward within a valid arc?
I spawn a camera in a scene using random coordinates for x and y and setting z=0 and orient ...
- 241