bidir vs Photon GI (CPU)

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daros
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bidir vs Photon GI (CPU)

Post by daros »

bidir vs Photon GI (CPU)

Some tests which do not make me wiser.
All glass surfaces have white shadow.

Bidir
bidir_1.jpg
Photon GI
photo gi02_1.jpg


Bidir
Boodls bidir_1.jpg
Photon GI
Boodls photon gi_1.jpg


Those are my photon Gi settings:

light.maxdepth 64
path.maxdepth 256
sampler.metropolis.maxconsecutivereject 512
renderengine.type "PATHCPU"
sampler.type "SOBOL"
film.filter.type "NONE"
lightstrategy.type "LOG_POWER"
sampler.metropolis.largesteprate 0.4
sampler.metropolis.imagemutationrate 0.10000000000000001
film.filter.width 1.5
film.opencl.enable 0
path.forceblackbackground.enable 0
filesaver.renderengine.type "BIDIRCPU"
filesaver.format "TXT"
path.clamping.variance.maxvalue 200000
scene.epsilon.min 0.000001
scene.epsilon.max 0.1
path.albedospecular.type "REFLECT_TRANSMIT"
path.albedospecular.glossinessthreshold 0.05
path.photongi.photon.maxcount 20000000
path.photongi.photon.maxdepth 64
path.photongi.glossinessusagethreshold 0.049
path.photongi.indirect.enabled 1
path.photongi.indirect.maxsize 0
path.photongi.indirect.haltthreshold 0.05
path.photongi.indirect.lookup.radius 0
path.photongi.indirect.lookup.normalangle 10
path.photongi.indirect.usagethresholdscale 8
path.photongi.caustic.enabled 1
path.photongi.caustic.maxsize 1000000
path.photongi.caustic.lookup.radius 0.025
path.photongi.caustic.lookup.normalangle 10
path.photongi.caustic.updatespp 8
path.photongi.caustic.updatespp.radiusreduction 0.96
path.photongi.caustic.updatespp.minradius 0.003
path.photongi.persistent.file -------
path.hybridbackforward.enable 1
path.hybridbackforward.partition 0.8
path.hybridbackforward.glossinessthreshold 0.1
daros
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Re: bidir vs Photon GI (CPU)

Post by daros »

Some reflections are responding in a very different way wen using photon gi.
daros
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Re: bidir vs Photon GI (CPU)

Post by daros »

by the way here a photon GI panorama:
https://momento360.com/e/u/d42006191986 ... size=large
epilectrolytics
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Re: bidir vs Photon GI (CPU)

Post by epilectrolytics »

daros wrote: Thu Jul 21, 2022 1:44 pm photon GI panorama
Awesome stuff!
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Sharlybg
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Re: bidir vs Photon GI (CPU)

Post by Sharlybg »

In the second example I wonder why Pgi loose so much brightness compare to Bidir.
Different clamping Value ?
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daros
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Re: bidir vs Photon GI (CPU)

Post by daros »

hi Sharlybg, those are my settings in bidir:
light.maxdepth 64
path.maxdepth 256
sampler.metropolis.maxconsecutivereject 512
renderengine.type "BIDIRCPU"
sampler.type "METROPOLIS"
film.filter.type "NONE"
lightstrategy.type "POWER"
sampler.metropolis.largesteprate 0.4
sampler.metropolis.imagemutationrate 0.10000000000000001
film.filter.width 1.5
film.opencl.enable 0
path.forceblackbackground.enable 0
filesaver.renderengine.type "BIDIRCPU"
filesaver.format "TXT"
path.clamping.variance.maxvalue 2000000000000000000
scene.epsilon.min 0.000001
scene.epsilon.max 0.1
path.albedospecular.type "REFLECT_TRANSMIT"
path.albedospecular.glossinessthreshold 0.05
daros
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Re: bidir vs Photon GI (CPU)

Post by daros »

interestingly in the second photon gi example the left wall is darker while the right /glass/chrome wall is brighter
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