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The following graph gives a good idea on the algorithm sophistication of the different light samplers.

Chart

Rays	2.45	3.13	4.51	7.27	12.78	23.8	45.88	90.1
3Delight	0.0933142	0.0658266	0.0441248	0.0290439	0.0185575	0.0117566	0.00752546	0.00449892

Rays	0.678	3.26	10.8	16.94	43.4	173.6	694.5
Arnold	0.15699	0.100115	0.0501787	0.0396399	0.0242515	0.0117413	0.00693426

Rays	1.47	2.94	5.88	11.7	21.1	47.02	94.14	376.3	751.3
RenderMan/RIS	0.151125	0.121487	0.0953649	0.0728148	0.0520606	0.0373876	0.0265388	0.0138148	0.00854045

The following graph shows the time required to achieve a certain quality. From user's perspective, this is an important quantity.

Chart

Time	5.72s	7.63	12.15	20.68	37.75	72.07	142.05	280.68
3Delight	0.0933142	0.0658266	0.0441248	0.0290439	0.0185575	0.0117566	0.00752546	0.00449892

Time	1	2	6	9	21	81	492
Arnold	0.15699	0.100115	0.0501787	0.0396399	0.0242515	0.0117413	0.00693426

Time	6.74	7.23	7.99	9.42	18.51	29.40	98.08	383.39
RenderMan/RIS	0.151125	0.121487	0.0953649	0.0728148	0.0373876	0.0265388	0.0138148	0.00854045

The following graph shows how much time it takes to build the acceleration data structure depending on sample/ray count.

Chart

Rays	2.45	3.13	4.51	7.27	12.78	23.8	45.88	90.1
3Delight	2	2	2	2	2	2	2	2

Rays	0.678	3.26	10.8	43.4	173.6	694.5
Arnold	0	0.35	1.2	3.2	11	41

Rays	1.47	2.94	5.88	11.7	47.02	94.14	376.3	751.3
RenderMan	3	3.2	4	4.7	9	15.5	51.2	97

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