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The render looks slightly better. Squares are transformed into circles using a cutout. The scene is lit by two large area lights from each side.
The cutout is done using a Maya Ramp. In Arnold it is connected to "opacity", in RenderMan to "presence" and in 3Delight to "transparency" !
(3Delight shown here)
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| Arnold | RenderMan/RIS | 3Delight OSL | 3Delight RSL | |
|---|---|---|---|---|
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| Technology | Unidirectional path tracer. | Using unidirectional path tracer. Other options are available but not useful for this test. | Unidirectional path tracer. | Undirectional path tracer |
| Shaders | C++ | C++ | OSL | RSL |
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| Common | Arnold | RenderMan/RIS | 3Delight OSL | 3Delight RSL | |
|---|---|---|---|---|---|
| Version |
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| Remarks | Area lights have 1 sample each. | Min Samples = Max Samples. | Only shading samples to set for sampling BRDFs. 3Delight OSL takes care of the rest. | The RSL path-tracer traces much more rays with the same settings. Refer to normalized performance only |
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| 3Delight OSL | Arnold | RenderMan/RIS | 3Delight RSL | |
|---|---|---|---|---|
| Image |
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| Total number of rays | 28.5 Millions | 31.6 Millions | 30.9 Millions | 37.4 Millions |
| Time on Linux | 33 seconds | 50 seconds | 74 seconds | 179 seconds |
| Compared to 3Delight OSL * | -- | 1.36 times slower | 2.07 times slower | 4.16 times slower |
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