...
- Only diffuse reflectors. The original test scene had a diffuse+specular surface but that generated a considerable amount of additional noise in Arnold. Since we want to concentrate on light sampling here, we decided to go for a simpler setup.
- We will disable any adaptive sampling so to make sure we have very close ray-counts.
- We will use only direct lighting to estimate the geometric area light contribution. In the statistics files for each renderer, one can see that we have only one path length.
- All Renders are done in Maya 2016.
The Renderers
| Arnold | RenderMan/RIS | 3Delight OSL | |
|---|---|---|---|
| Version |
|
|
|
| Technology | Unidirectional path tracer. | Using unidirectional path tracer. Other options are available but not useful for this test. | Unidirectional path tracer. |
| Shaders | C++ | C++ | OSL |
Methodology
We are interested to find out about:
...
We will start by creating a "ground truth" image for each renderer. This image is generated by using a very large amount of samples so there is no more apparent noise. We will then render several images with varying amount of samples and measure the RMSE between these images and ground truth. Timings will be taken at each render. Having this data will allow us to draw a conclusion about convergence rate and general performance.
The
...
...
...
Setup
Notes About Sampling Parameters
...