**Final project proposal**
(#) Chun-Yi She (f0070nw)
(##) Motivational image
Theme: Reflections on Time
A row of bottle can be arranged with different angles of light that creates different lengths of shadows to represent the past of time.
Shadows is the main subject, caustics should also be included to make the image more realistic.
Image Link:
https://nl.pinterest.com/pin/13018286415426640/
Image Link:
https://nl.pinterest.com/pin/363525001182353052/
(##) Proposed features and points
Photon Mapping (8pts) - for caustics effect
Intel's Open Image Denoise integration (3pts) - for denoising
Parellization with Nanothread/C++17 Execution Policy/OpenMP (2pts) - speed up rendering
SBVH (4pts) - speed up rendering
(##) Stretch goals (optional)
Homogeneous Scattering Participating Media(4pts) - fluids inside the bottles
(##) SBVH
I ran the leaderboard scene from assignment 2 to compare the performance between three spliting methods.
```
Middle
Total intersection tests per ray: 2.8
Nodes visited per ray: 40.09
Figure of merit: 112.49
SAH
Total intersection tests per ray: 3.0
Nodes visited per ray: 35.37
Figure of merit: 106.3
SBVH
Total intersection tests per ray: 2.9
Nodes visited per ray: 34.34
Figure of merit: 99.62
```
Middle Statistics:
```
Statistics:
———————————————————————————————————————————————————————————————————————————————————————————————
BBH
Nodes visited per ray 59745037 / 1490097 (40.09x)
Geometry
Triangles per mesh 60788 / 1 (60788.00x)
Integrator
Camera rays traced 645120
Intersections
Quad intersection tests per hit 1044269 / 526726 (1.98x)
Total intersection tests per ray 4180664 / 1490097 (2.81x)
Triangle intersection tests per hit 3136395 / 368239 (8.52x)
Memory
Triangles 3.59 MiB
Scene
Materials 1
Surfaces 2
———————————————————————————————————————————————————————————————————————————————————————————————
```
SAH Statistics
```
Statistics:
———————————————————————————————————————————————————————————————————————————————————————————————
BBH
Nodes visited per ray 51371681 / 1452375 (35.37x)
Geometry
Triangles per mesh 60788 / 1 (60788.00x)
Integrator
Camera rays traced 622080
Intersections
Quad intersection tests per hit 1217853 / 716632 (1.70x)
Total intersection tests per ray 4365060 / 1452375 (3.01x)
Triangle intersection tests per hit 3147207 / 380719 (8.27x)
Memory
Triangles 3.59 MiB
Scene
Materials 1
Surfaces 2
———————————————————————————————————————————————————————————————————————————————————————————————
```
SBVH Statistics
```
Statistics:
———————————————————————————————————————————————————————————————————————————————————————————————
BBH
Nodes visited per ray 51030823 / 1485955 (34.34x)
Geometry
Triangles per mesh 60788 / 1 (60788.00x)
Integrator
Camera rays traced 645120
Intersections
Quad intersection tests per hit 1255343 / 737421 (1.70x)
Total intersection tests per ray 4310580 / 1485955 (2.90x)
Triangle intersection tests per hit 3055237 / 370423 (8.25x)
Memory
Triangles 3.59 MiB
Scene
Materials 1
Surfaces 2
———————————————————————————————————————————————————————————————————————————————————————————————
```
Here are the render results from that scene:
(##) Open Image Denoise integration
Ran color denoising and got the following results:
(##) Parellization with Nanothread/C++17 Execution Policy/OpenMP
For the cornell box scene, I ran both single thread and multi-thread with 24 threads. The following are the results:
The single thread took 1min 9seconds to render the scene, while the multi-thread took 6 seconds to render the scene.
(##) Photon Mapping
The following comparisons has the default parameters as the following:
"search radius": 0.001,
"serach count": 500,
"total samples": 5000000
Photon Mapping with different radius:
(##) Photon Mapping
The following comparisons has the default parameters as the following:
"search radius": 0.001,
"serach count": 500,
"total samples": 5000000
Photon Mapping with different radius:
