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- 3Delight is slower to generate these samples. For draft renders (high variance), Arnold is fastest. For final renders (low variance) 3Delight becomes increasingly faster with increasing samples.
- Arnold and RenderMan/RIS draw samples at about the same speed, but the quality of Arnold samples is better.
- Both Arnold and RenderMan/RIS produce biased images at low sample counts. More specifically: images are darker. 3Delight manages to keep the same energy overall independently of sample counts.
- Arnold, 3Delight and RenderMan/RIS rely on acceleration data structures to sample the geometric area lights. In Arnold and RenderMan/RIS, the algorithmic complexity to build those data structures is tied linearly to the number of samples (as well as the complexity of the light). In 3Delight, only the complexity of the light matters (time to first pixel for 3Delight was 2-3 seconds no matter how many samples there were).
Resources
| RenderMan/RIS | Arnold | 3Delight | |
|---|---|---|---|
| Images and Stats | arnold.tar.gz | 3delight.tar.gz | |
| Maya Scene | mal_prman.ma | ||
| Remarks | The same scene works with both 3Delight and Arnold | ||