**Abby & Daniel Final Project**
(#) Abby Owen (F003WV0) and Daniel Westphal (F00449R))
(##) Motivational image
Our initial plan was to render an image of a human looking into a mirror with a skeletal reflection staring back at them.
This was to reflect "it's whats on the inside that counts", as the person would literally be looking at their insides.
In the end, due to external circumstances and a very lofty goal, we were unable to produce our desired image. However,
we decided to focus on some technical features that we discussed in class to add to our renderer.
Our initial concept for this we created in photoshop as part of our proposal.
We translated this to a 3D model of the scene in Blender.
A few sentences describing how the image conforms with this year's theme.
(##) Features
* Microfacet Models - Oren-Nayar Diffuse Reflection
This is a feature we implemented to be used in our skeletal structure as opposed to just a simple Lambertian material.
We thought that this feature would beter represent the imperfections and appearance of bones. In this Oren-Nayar model, sigma represents the standard deviation of the angles of the microfacets.
We tested this feature on a simple lambertian scene we had from a previous assignment.
I will show now the difference between various values of sigma, as well as the fact that when sigma = 0, oren nayar should mimic lambertian reflection:
Here, we can see that when sigma = 0, Oren-Nayar diffuse reflection converges to lambertian reflection:
* Microfacet Models - Torrance-Sparrow with a Beckmann Microfacet Models
This is a feature that we implemented to be used as a metallic material for our vanity object in our scene. We wanted to be able
to control both horizontal and vertical components of our microfacet model. We used the anisotropic form of this equation to do so.
Below, we show this model's success at rendering bronze colored objects like what we want for our scene.
Parameters alpha x and alpha y represent the slope of the microfacets with respect to both vertical and horizontal axes.
We checked this against a rendering with a metal material
* Volumetric Path Tracing for homogenous participating mediums with both scattering and absorbing
Below, we show our implementation of VPT for homogenous participating media. Our first test case shows that with an absorption and scattering coefficient of 0,
our VPT acts the same as path tracing with material sampling.
After verifying this, we tested this scene with various values for absorption and scattering coefficients.
(#) New Disk Shape: 2 pts
The disk is a unique new surface that we made. We wanted to incorporate a clock into our final scene and we thought that
this shape would allow us to do so. We paid special attention to creating new pdfs, sampling functions, and ensuring that uv coordinate
mapping was successful so we could wrap a clock texture around this disk.
Here are some examples of texture mapping our disk structure with a clock image:
(#) Final Images
While we weren't able to render our image with all of the features we inititally intended to due to extenuating cirumstances, we have
a few images that we rendered that were close to what we hoped to produce.
Normal Verification of the Blender Scene:
100 samples VPT with oddly textured head:
1 sample VPT lambertian head:
We translated this to a 3D model of the scene in Blender.
A few sentences describing how the image conforms with this year's theme.
(##) Features
* Microfacet Models - Oren-Nayar Diffuse Reflection
This is a feature we implemented to be used in our skeletal structure as opposed to just a simple Lambertian material.
We thought that this feature would beter represent the imperfections and appearance of bones. In this Oren-Nayar model, sigma represents the standard deviation of the angles of the microfacets.
We tested this feature on a simple lambertian scene we had from a previous assignment.
We checked this against a rendering with a metal material
* Volumetric Path Tracing for homogenous participating mediums with both scattering and absorbing
Below, we show our implementation of VPT for homogenous participating media. Our first test case shows that with an absorption and scattering coefficient of 0,
our VPT acts the same as path tracing with material sampling.
(#) Final Images
While we weren't able to render our image with all of the features we inititally intended to due to extenuating cirumstances, we have
a few images that we rendered that were close to what we hoped to produce.
Normal Verification of the Blender Scene:
100 samples VPT with oddly textured head:
1 sample VPT lambertian head:
