34 minutes ago, sbs9 said:

That is a 22% decrease. More than 1/5 of your performance is wasted for a couple of airport lights. A disaster!

By the way, you say same settings as me, without knowing my settings? A good joke :D

I normaly run 30HZ vsync thats all , did a test with unlocked

with this settings i bottleneck a single 1080TI as you do in your screens with your settings.

I run 2X 1080TI SLI that the difference i have much more headroom to deal with the DL.

the cpu is a 5ghz I9 7920X no HT 32gb 4000mhz mems

 Vic give you a hint what to do

 

 

22 hours ago, sbs9 said:

Congratulations! But "as smooth as it can be" is not a very exact definition :) Do you get stable 60 FPS? Or even 120?

My definition of "as smooth as it can be" is, at the moment, a 30Hz monitor with stable 30 FPS in the sim. I can get it almost always, even with DL enabled, when I am forced to use it by a devil-may-care developer. Of course, with some compromises in autogen, scenery complexity, AI traffic or elsewhere.

The problem is that 30%, or more, of my PC's power (that was not free at all) is swallowed by just one "stupid" eye candy called dynamic lighting, which taxes my system almost as much as a complete A320 simulation (i.e. FSLabs). This is bizarre. 

'As smooth as can be' is enjoying your flight and having no reason to think about settings and performance throughout.

As for FPS, I lock mine externally with Nvidia Inspector at 30.5 and it makes a significant difference when it comes to smoothness. I never understood the talk about how many FPS you get. People gloating about getting 70 FPS - that's nice but what exactly is the benefit compared to 30 or even 25? Having a smooth experience without stutters is the key, whatever the FPS.

Dynamic lighting has been implemented for the first time in P3D in v4 and it was obvious from the start that it's in early stages and needs improvement.

Dear Vic, westman, Nyxx, simbol,

Thank you for your effort. I appreciate your determination to help, but please try to understand that some people use the simulator for different purposes and have different needs than you have. And please try to distinguish the method for solving the problem from the reason for solving it. You address the method, but ignore the reason. I know how to optimise my sim, but I do not want to optimise it because of a feature, which I don't need.

Prepar3D is a training tool, right? I may accept that for a game, visual effects are crucial. But for a training tool? Thus, I think it's absolutely unacceptable to sacrifice any core functions because of DL.

I do not post often, but decided to speak up this time. If you feel that I hyperbolise the problem, let me say something personal. Few days ago, I got an e-mail from my friend and business partner. I recommended him P3D4 as a training platform for his PPL. He requires 60 FPS and the only reason he doesn't get it is dynamic lighting - the feature with a zero impact on his training results. He asks me to switch this *** off, but it's not possible, as the aircraft does not support the legacy lighting. He told me that he wasted his money. I am upset. I am angry. I feel betrayed by my beloved platform :-/ That is why I need to say this:

Dear developers, please realise that Prepar3D is a training tool, not a game for children. Do not force us to use graphically intense eye candies, without the option to turn them off. Dear Lockheed Martin, please realise that the dynamic lighting, at its current state of implementation, is a potential threat and can harm reputation of your product as a matured training platform. Please correct the implementation, or take it out from the sim.

Those of you who understand and agree, please spread the word. My arsenal of time and energy is now depleted.

Wishing you a Christmas that is full of light, folks! Dynamic or not ;-)

Roman Heriban
www.sbsim.com

well, seems the time has come to lock this down and we can keep going back and forth and we will maintain our same positions.

However, I won't quote your entire post but this  - He requires 60 FPS -  there is absolutely no reason for any P3D user to "require" 60fps under normal use - be it "training" or "simming". You may want it for various reasons but if you REQUIRE it - there is something seriously wrong with the setup. Period.

Vic