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3Delight – We have only one control for the general quality of the render. In the case of direct lighting, 3Delight "understands" that samples are best used for light sampling and that's what it does. As tests will show, those samples have a linear impact on perceived noise levels.
Results
Arnold
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3.26 M
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3Delight
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3.13 M
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RenderMan/RIS
97s
1.47 M
2.94 M
11.7 M
| The following plot gives us The following graph gives a good idea on the algorithm sophistication of the different light samplers. |
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| The following plot gives us a good idea graph shows the time required to achieve a certain quality. From the user's perspective, this is an important quantity. |
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| The following chart graph shows how much time it takes for each renderer to build the light acceleration data structure depending on sample count. |
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Arnold
| Samples (effective) | 2 (1.23) | 4 (4.91) | 8 (19.64) | 10 (30) | 16 (78.56) | 32 (314.29) | 64 (1257.18) |
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| Time | 1s | 2s | 6s | 9s | 21s | 1:21 | 8:12 |
| TTFP | 0s | 0.35s | 1.2s | 2.0 | 3.2s | 11s | 41s |
| Shadow Rays | 0.678 M | 3.26 M | 10.8 M | 16.94 M | 43.4 M | 173.6 M | 694.5 M |
| RMSE | 0.15699 | 0.100115 | 0.0501787 | 0.0396399 | 0.0242515 | 0.0117413 | 0.00693426 |
3Delight
| Samples | 2 | 4 | 8 | 16 | 32 | 64 | 128 | 256 |
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| Time | 5.72s | 8s | 12.82 s | 22.18 s | 40.92 s | 86.91 | 165.69 s | 302.98 |
| TTFP | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| Shadow Rays | 2.45 M | 3.13 M | 4.51 M | 7.27 M | 12.78 M | 23.8 M | 45.88 M | 90.1 M |
| RMSE | 0.0933142 | 0.0658266 | 0.0441248 | 0.0290439 | 0.0185575 | 0.0117566 | 0.00752546 | 0.00449892 |
RenderMan/RIS
| Samples | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 256 | 512 | 1024 |
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| Time | 6.74s | 7.23s | 7.99s | 9.42s | 12.12s | 18.51s | 29.40 | 1:38.08 | 3:15.77 | 6:23.39 |
| TTFP | 3.1s | 3.2 | 4s | 4.7s | 6.7s | 9s | 15.5s | 51.2s | 97s | |
| Rays | 1.47 M | 2.94 M | 5.88 M | 11.7 M | 21.1M | 47.02 M | 94.14 M | 376.3 M | 751.3 M | 1499 M |
| RMSE | 0.151125 | 0.121487 | 0.0953649 | 0.0728148 | 0.0520606 | 0.0373876 | 0.0265388 | 0.0138148 | 0.00854045 | 0.00396 |
Conclusions
- 3Delight generates light samples that are algorithmically better than both Arnold and RenderMan. In short, for N effective samples:
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