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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	8	12.82	2220.1868	4037.9275	8672.9107	165.69	302.98
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 count.

Chart

width	800
domainAxisUpperBound	300
title	Time to First Pixel vs. Samples
type	xyLine
yLabel	Time to First Pixel
domainAxisLowerBound	0
rangeAxisUpperBound	50
xLabel	Million Rays

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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Samples	2	4	8	16	32	64	128	256
Image
Time	5.72s	8s	12.82 s	2220.18 68 s40	37.92 s75s	8672.9107	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

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