Gents,

I have an Xtreme Prototypes Lear 25 which is a great aircraft to fly with a great VC too. The one major flaw is the impact the lights have on the GPU and the system in general.

For many well designed airports this is not a problem but some like Orbx Bilbao and especially in 4K the impact is so severe the fps drop significantly.

Example at LEBB just before dawn. Airport buildings illuminated and with a C&D cockpit GPU usage is 55%

If I then turn on cockpit lighting and avionics it goes to 66%. What follows is the change as each set of lights is turned on...

Beacon 75-78%

Navigation 75-78%

Turning on Taxi and Landing Lights for some odd reason doesn't hit the GPU but the frame rate drops to 15 when it was 30 before.

I've spoken to the developers and they're insistent they cannot change the lights but in fairness they're testing at 1920*1080 and I'm running in 4K.

Is it possible for me to substitute the lights that came with the aircraft to yours?

 

5 minutes ago, Ray Proudfoot said:

Gents,

I have an Xtreme Prototypes Lear 25 which is a great aircraft to fly with a great VC too. The one major flaw is the impact the lights have on the GPU and the system in general.

For many well designed airports this is not a problem but some like Orbx Bilbao and especially in 4K the impact is so severe the fps drop significantly.

Example at LEBB just before dawn. Airport buildings illuminated and with a C&D cockpit GPU usage is 55%

If I then turn on cockpit lighting and avionics it goes to 66%. What follows is the change as each set of lights is turned on...

Beacon 75-78%

Navigation 75-78%

Turning on Taxi and Landing Lights for some odd reason doesn't hit the GPU but the frame rate drops to 15 when it was 30 before.

I've spoken to the developers and they're insistent they cannot change the lights but in fairness they're testing at 1920*1080 and I'm running in 4K.

Is it possible for me to substitute the lights that came with the aircraft to yours?

 

Are you using SSAA antialiasing by any chance?

13 minutes ago, simbol said:

Are you using SSAA antialiasing by any chance?

Nope. 4xMSAA, FXAA is Off, Texture Res is 4096 and Anisotropic is 16x.

36 minutes ago, Ray Proudfoot said:

Nope. 4xMSAA, FXAA is Off, Texture Res is 4096 and Anisotropic is 16x.

Can you reduce Anisotropic to 4x and ensure you do not have any nvidia profiles using super sampling or any weird thing? the best would be to clear them and re-test.

I don't think putting my effects to the Learjet would fix your problem.. you have an issue with Dynamic Lighting performance under 4K. Most of the time I find these problems are related to excessive anti-aliase settings / workloads configured for the GPU.

Dynamic Lighting works at "pixel" level, this means it needs to check each pixel on the screen in order to light it up or not light it up.. the more pixels you have the more work it needs to do.. when you add more antialiasing or certain settings via nvidia control panel, this can cause more internal pixel rendering inside your GPU, which in turn.. causes Dynamic Lighting to work harder since there are more pixels to check.. this is very noticeable when you go to 4K or above.

Example, SSAA x 4 or "Super Sampling x 4". This instruct your GPU to multiple your current rendering times 4 and reduce it back to remove jagged lines. This means a 4K screen would be multiplied x 4 (33 Million pixels instead of just 8M) and then rendered back to (4k) on each single frame.. however Dynamic Lighting would need to verify 33Million pixels on each frame to render the lights! you can see how this start causing FPS problems.. it becomes even worse at SSAA x 8!.

Other nvidia profile settings can cause also issues with DL, because the way pixels are calculated and rendered.. so my advise is to identify the source of the problem..

AI Lights Reborn effects are tweaked to be looked at from far distances, so I don't think they will work correctly for you as you intent to do.. but there is an upcoming product that I have been working with //42 for this airplane which would work better for what you need. However i think you need to find first what your system is severely affected by 4K.

Regards,

S.

Edited July 2, 20214 yr by simbol

Simbol, appreciate the post and advice but this problem only occurs with this aircraft. I have the PMDG737 plus a Vertx DA62 and the Carenado PC12 none of which have this problem. It’s definitely an issue with the way lights are coded in the Lear.

I’ll hang fire until your new product is released and take it from there. I find DL much improved in v5 just not with the XP Lear 25.

41 minutes ago, Ray Proudfoot said:

I’ll hang fire until your new product is released and take it from there. I find DL much improved in v5 just not with the XP Lear 25.

Yea but I inspected their lights because we are implementing our own.. and there is noting wrong with them.. let's hope the ones I designed for it will be suitable for your system..

S.