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Nullifier
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Go and get your cup of coffee now.

Made using Cinema 4D, Turbulence FD for smoke (separate pass), Photoshop for texturing and compositing (no color correction was done on the main image at all), UVLayout for bean texturing process.
GTX 760 - 2 hours 30 minutes. Pathtracing still leaves a little bit of noise, probably should use Pmc next time.
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render-coffee-final.png
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aoktar
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Nice but too long render time. Try to use coherent ratio, gi_clamp, causticblur=1, etc.. it should clean much faster
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Nullifier
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aoktar wrote:Nice but too long render time. Try to use coherent ratio, gi_clamp, causticblur=1, etc.. it should clean much faster
Thanks aoktar. I used coherent ratio=0.3, and others by default. I'll try to play with them next time. Also gpu was set on use Priority, so maybe it wasn't going for its max, although system wasn't using anything else at the time of rendering.
itsallgoode9
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I don't think that time seems too long. He's only using a single card and heavy DOF takes a long ass time to become this clear at larger resolutions.
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aoktar
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itsallgoode9 wrote:I don't think that time seems too long. He's only using a single card and heavy DOF takes a long ass time to become this clear at larger resolutions.
don't agree. Surely has weaker gpu and big res, anyway it should be possible to get much lower times. I say that because i can do it some appropiate tweaks. Which are depended to scenarios. But every renderer can be faster with own tricks. Rule is invariable.
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Nullifier
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aoktar wrote:
itsallgoode9 wrote:I don't think that time seems too long. He's only using a single card and heavy DOF takes a long ass time to become this clear at larger resolutions.
don't agree. Surely has weaker gpu and big res, anyway it should be possible to get much lower times. I say that because i can do it some appropiate tweaks. Which are depended to scenarios. But every renderer can be faster with own tricks. Rule is invariable.
I have used a little bit of SSS on cup, maybe it also caused render to be longer?
I have set 16k samples, so 2:30 hours for that amount of samples is pretty good for my setup I think.
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aoktar
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Yes possible.
A trick to illuminate and detect noise sources: Everytimes use clay modes and different scenarios to see differents. Check different materials and light sources to found better ways. Also a reflective material can cause strange noises. Check materials and try with diffuse type to test.

Also if caustic blur is not 1.0, that will cause big fireflys on PT. Even gi_clamp<10 is good to cut fireflys.
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Nullifier
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aoktar wrote:Yes possible.
A trick to illuminate and detect noise sources: Everytimes use clay modes and different scenarios to see differents. Check different materials and light sources to found better ways. Also a reflective material can cause strange noises. Check materials and try with diffuse type to test.

Also if caustic blur is not 1.0, that will cause big fireflys on PT. Even gi_clamp<10 is good to cut fireflys.
Ok, thank you for great advices aoktar. Will keep them in mind for next renders.
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jate
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What did you do for the foam in the coffee?
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Nullifier
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jate wrote:What did you do for the foam in the coffee?
It's just a random texture of coffee with normal map generated from nDO, and simple specular map drawn above black spots. Also, slight sculpting on the mesh to give visual volume for foam.
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