Page History

...

The Renderers

	Arnold	RenderMan/RIS	3Delight OSL	3Delight RSL
Version
Technology	Unidirectional path tracer.	Using unidirectional path tracer. Other options are available but not useful for this test.	Unidirectional path tracer.	Undirectional path tracer
RSShaders	C++	C++	OSL	RSL

...

We will be testing the wall clock time for all renderers. Every renderer will be run 3 times in succession and the average time will be taken. We make sure that nothing is running on the machines so not to slow down the poor renderers. The render is launched from Maya. We have three test machines available:

Mac

LinuxWindows

% lscpu

Code Block

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                16
On-line CPU(s) list:   0-15
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 26
Stepping:              5
CPU MHz:               2395.000
BogoMIPS:              4787.24
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              8192K

% free -m

Code Block
total used free shared buffers cached Mem: 11984 8139 3844 0 151 4728 -/+ buffers/cache: 3259 8725 Swap: 0 0 0

The Setup

Screent Shot

	Arnold	RenderMan/RIS	3Delight OSL
Version	Image RemovedImage Added	Image RemovedImage Added	Image Removed Image Added
Remarks		Min Samples = Max Samples Light Samples = 2, seems to give closer results to Arnold	Only shading samples to set for sampling BRDFs. 3Delight OSL takes care of the rest.

The Results

	3Delight OSL	Arnold	RenderMan/RIS
Image	Image RemovedImage Added	Image RemovedImage Added	Image RemovedImage Added
Total number of rays	28.5 Millions	31.6 Millions	30.9 Millions	Time on Mac
Time on Linux	33 seconds	50 seconds	74 seconds
Compared to 3Delight OSL *	--	21.4 36 times slower	2.75 07 times slower

* Taking into account total the total number of traced rays traced but not CPU usage.

Conclusion

3Delight's OSL-based path-tracer provides outstanding performance results. Building a rendering core around the OSL shading system, as opposed to just "integrating" OSL in the renderer, seems to have given 3Delight a good performance advantage.

...

Arnold

3Delight OSL & RSL

RenderMan/RIS

Maya Scene (ASCII)

Statistics

stats_prman.txt, stats_