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Olivier Boscournu is the winner of the Render of the Week Award for the week of  May 14, 2012.
 Other than Yafaray, Olivier has succeeded in duplicating his convincing "Bidirectional Interior with Yafaray" scene in BI and Cycles as well.
What difference did he discover in using all these Blender's three major render engine?
 Olivier has the following observation to share.
The following article may not reflect the official view of www.BlenderNews.org.—Editor in Chief.


Comparison_BI-Yafaray-Cycles copie.jpg


June 4, 2012 12:40 AM

 

by Olivier Boscournu

 

Blender is a free 3D software package and is ideal for small studios or freelance CG artists who need to provide cost-effective and quality 3D renders. Still in development, the new Cycles render engine has been integrated since the 2.61 version, with GI render and GPU support. Still young, it offers a Pathtracing method which is very effective for outdoor rendering or a render for open stages where light spreads easily. For interior renderings, I usually work with Yafaray, which is very easy to configure and offers several lighting solutions, but it only calculates with CPU. I named this picture "Bidirectional Interior," because it was rendered with the Bidirectional Pathtracing method of Yafaray. Having never tried this, I decided to test it to see its performance. This unbiased solution is relatively slow, even if we take it into account that it's being rendered just by CPU. I also wanted to compare the Blender Internal to check if it's able to perform for an indoor scene.


Blender Internal

With no add-on required and easy to use, it's more ideal for beginners. It's suitable for product/studio rendering, similar to Direct Lighting of Yafaray and Cycles, where Global Illumination and light bounces are not useful. To accentuate the realistic, BI offers two solutions for ambient occlusion, an approximate and raytraced one. The latter is a little bit slower but is also more precise, it is this that I used for this scene. The materials are typically configured, without going through the nodes but by using multiple channels and different textures. Two lights illuminate the room, a lamp into the lamp and an area on the right to simulate the light from a window. It is important to increase the samples of lamps for soft shadows. The more complicated with the internal is to simulate the bounce light. Fortunately, it is possible to make many different passes that are very useful in post-production. BI-config.jpg


Yafaray 0.1.2 

My favorite! Its greatest advantage is the ease of use in configuring the engine and materials. The speed of Photon Mapping is quite impressive, and the Direct Light method is faster than that of BI. Six different shaders seem to be short but you can configure most of the needed materials for an interior rendering. For me, Yafaray is a free "Vray" even if it doesn't provide as many render passes.

Yafray-config.jpg


Cycles 

I use Cycles very rarely, except for projects involving furniture design, where the real-time preview is very practical. Unbiased calculation is rather long with the CPU, so it is imperative to have a good GPU, preferably with Nvidia Cuda, to take full advantage of the acceleration to reduce the rendering time significantly. The materials are configured with the nodes that allow a great flexibility in the creation of complex shaders.

Cycles-config.jpg


Conclusion

So, my observation is ....

BI-Yafray-Cycles-Compare.jpg

List of Articles
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Blender Features BI vs. Cycles vs. Yafaray - an Artist's Observation file Jun 05, 2012 78705
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Render of the Week 'Pripyat, 1987' by Anuraag - the Winner of the Week of June 4, 2002 file Jun 04, 2012 11094
Tutorials 'Subsurface Scattering' in Cycles Revealed file May 21, 2012 17549
Render of the Week 'Minotaurus' by Tamas Torok - the Winner of the Week of May 28, 2002 file May 28, 2012 11596
Render of the Week 'SSS Study' by Kent Trammell - the Winner of the Week of April 30, 2012 file Apr 30, 2012 16015
Render of the Week 'Loft in Cloister' by Enrico Cerica - the Winner of the Week of April 23, 2012 file Apr 23, 2012 13359
Render of the Week 'Remote Drone Spider' by Ben Milwood - the Winner of the Week of May 7, 2012 file May 07, 2012 14889
Render of the Week "Cryptocephalus" by Gabriel Tomczak - the Winner of the Week of May 21, 2012 file May 21, 2012 11549
Render of the Week Bidirectional Interior with Yafaray - by Olivier Boscournu - the Winner of the Week of May 14, 2012 file May 14, 2012 21027
Blender Releases Blender 2.63a Update file May 14, 2012 6811
Tutorials 'Sculpting' the Tornado file May 07, 2012 9874
Tutorials Individual Video Tutorials Worthy of Your Attention: Daniel Kreuter file Apr 30, 2012 10627
Blender Releases Blender 2.63 Released! file Apr 30, 2012 7138
Blender Features Beware, BMesh Is Here! file Apr 24, 2012 11731

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