Montreal day vs night textures performance

[maca11]

Hi all,
I installed Montreal v2. So nice.
During a day no issues with performance at all. At night however FPS drop by cca 15.
What is the main difference ? dynamic lights should go on GPU I guess, but workload of my GTX1080 Ti is OK.
Any specific reason for so more heavy CPU workload ?
many thanks for any idea !
JM

[commandantyuuki]

Yeah maybe just the scenery but also at night the environment outside the airport is quite massive with some addons witht the dynamic lighting... You might have GSX + GSX V2 with some PMDG aircraft or Active Sky... At night it is less performant... but I don't get a loss of 15 fps, maybe 1 or 2 but not that much....

[george[flytampa]]

Tried turning off dynamic lighting in the p3d options? It doesn't make much of a difference on my 1070.
Maybe the PBR makes it work harder a night if you have dynamic reflections turned up high.