A new test with scene :
10 min on a I7-3770K.
I took into account the explanations of .
Editor :
Lighting Quality : Production
Static Lighting Level=0.2
Num Indirect Lighting=100
Indirect Lighting Quality=1
Indirect Lighting Smoothness=1
BaseLightmass.ini :
[DevOptions.PhotonMapping]
NumIrradianceCalculationPhotons=2000
IndirectPhotonSearchDistance=1000
[DevOptions.StaticLightingProductionQuality]
NumHemisphereSamplesScale=100
NumDirectPhotonsScale=1
NumIndirectPhotonsScale=1
NumIndirectIrradiancePhotonsScale=1
AdaptiveBrightnessThresholdScale=.01
This is a lot faster than anything I tested so far.
(Depending of the scene and without the futur “skylight portal”, the NumHemisphereSamplesScale may need to be increase even more)
PS : Please, can someone at Epic do something for the really ugly temporalAA implemeted in 4.9 (I try 4.10 preview and it’s the same thing).