Clay rendering button

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telemmaite
Licensed Customer
Posts: 77
Joined: Tue Jun 01, 2010 7:50 am
Location: Sofia,Bulgaria

I dont get it when i press the Clay-mode it works as intended but the speed of my render is halved ? I think it should be exactly the opposite way? There is noway that an object with specular+diffuse+bumps renders 2 times faster than a white no-specular material..
i5 2500K 4.7Ghz | Ram 4GB 1600mhz Kingston | Palit GTX 470 | Win7 64x | Octane with Blender 2.59
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PhilBo
OctaneRender Team
Posts: 553
Joined: Wed Oct 21, 2009 2:36 pm
Location: Warren, Michigan USA

Can you confirm with different scenes? I get an almost 2X increase when going to clay mode.
Win7 64| Two GTX 470s | Phenom II 920 | 8 GB
Win7 32| GTX 260 | Athlon X2 5000+ BE | 2 GB
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telemmaite
Licensed Customer
Posts: 77
Joined: Tue Jun 01, 2010 7:50 am
Location: Sofia,Bulgaria

I will try it out. It happens with PMC.
i5 2500K 4.7Ghz | Ram 4GB 1600mhz Kingston | Palit GTX 470 | Win7 64x | Octane with Blender 2.59
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roeland
OctaneRender Team
Posts: 1823
Joined: Wed Mar 09, 2011 10:09 pm

The reflection value of the clay is quite high, probably higher than the materials in the scene, and russian roulette by default (if rrprob is set to 0.0) continues a ray with a probability proportional to the reflection value. So in clay mode the paths traced may be longer on average, causing the renderer to slow down.
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Roeland
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