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Huge FPS Drop ingame 4.13

Hi,

I'm currently working on an archviz scene and I'm facing a pretty huge FPS drop when playing my scene which happens randomly.

When I'm launching my scene, I'm around 20 and 40 fps on a microsoft surface. alt text

I can walk accross the level without any problem but suddenly there's a fps drop and it can happen anytime -> 5 seconds after launching the game or 15 minutes after => making the problem difficult to track because it can happen anywhere and anytime on the scene. After the big drop, fps never go up again whatever I do, switching engine scalability to low or else. alt text

Furthermore, this is a problem I encounter only on the microsoft surface, no problem with a computer or even in VR.

I tried removing all the meshes except for the walls and floors. The problem doesn't seem to occur. I also tried putting only 1 room and the problem occured (I previously tried without this particular room + another one). I then tried to set on the previous room the same material for every mesh and the problem doesn't seem to occur. So I'm thinking that maybe the problem is material related!?

Is there any ways to check the integrity of the materials used?

Any help would be greatly appreciated :) Thanks

Product Version: UE 4.13
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asked Nov 17 '16 at 04:36 PM in Rendering

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After a long day and a long night pulling my hairs off, I was finally able to track down the problem..

I thought I'd just share what I found in case someone encounter the same problem. So I tried everything, removing all the meshes, removing all the materials, reflections, etc but the problem was still here.

Then I just moved all my mesh on another level, which had not the same lighting configuration and It worked, the problem didn't occur. So I launched several build during the night with different settings to test and the answer were the stationnary lights. I built all my level using static and the problem doesn't show and I gained between 5 - 10 fps.

So I guess when you work on a tablet, avoid stationnary, I still don't know the correct explanation why that huge drop happened but at least I know what not to use.

Hope this post will help.

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answered Nov 18 '16 at 10:36 AM

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