# Huge FPS drop when looking at the sky / Nothing **URL:** \ **Category:** Community & Industry Discussion\ **Tags:** project, sky-sphere, unreal-engine, UE4, question\ **Created:** [February 24, 2016, 10:07am UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498 "2016-02-24T10:07:33Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![atanknomore](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@atanknomore](https://forums.unrealengine.com/u/atanknomore)\ **Post date:** [February 24, 2016, 10:07am UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/1 "2016-02-24T10:07:33Z")
Hello guys, Today I’m coming to you with the following problem: when I look at the sky I get huge frame drops. Whenever I look up or that there;s any of it visible, I get drops. It doesn’t matter if I have a sky box or not. By frame drop I mean that from a scene that has 20-40fps on 1440p, to a max of 7 fps just by looking up. I’m using Win7 HP 64-bit, Unreal Engine 4.9.2 and have an r9 290 crosffire, i7 4770 and 16gb of ram. If you need further information let me know. thank you and have a great day 🙂 ---
**Author:** ![Bino](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bino](https://forums.unrealengine.com/u/Bino)\ **Post date:** [February 24, 2016, 11:52am UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/2 "2016-02-24T11:52:33Z")
There’s a bunch of these in answerhub. All have varying issues so this is hard to debug from this. Your PC is pretty good so I’m going to assume it’s ok - unless you have dual r9s. I recall reading that doesn’t perform well in UE4. Is this happening on a blank project? If a blank project works fine then it’s probably a process of elimination and measurement - [Performance and Profiling | Unreal Engine Documentation](https://docs.unrealengine.com/latest/INT/Engine/Performance/) ---
**Author:** ![atanknomore](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@atanknomore](https://forums.unrealengine.com/u/atanknomore)\ **Post date:** [February 24, 2016, 1:03pm UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/3 "2016-02-24T13:03:34Z")
Would you recommend on taking an r9 290 out of my system for now? I’ll take a look on that link. It has happened on several projects of mine already, but not all. ---
**Author:** ![Bino](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bino](https://forums.unrealengine.com/u/Bino)\ **Post date:** [February 24, 2016, 8:27pm UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/4 "2016-02-24T20:27:23Z")
Yeah I reckon it’s crossfire. It’s not officially supported in UE4 (as far as I can tell). I’d try removing one as a test. I have a r9 290 (latest drivers) with an i7 and 16gig of RAM and I’ve never seen this. > **[Does the UE4 engine support SLI?](https://forums.unrealengine.com/questions/21746/does-the-ue4-engine-support-sli.html)** > > Does the UE4 engine and development tools support SLI? I am building a PC and i just need to know if its worth getting two GTX 760s > **[Crossfire support?!](https://forums.unrealengine.com/showthread.php?29105-Crossfire-support-)** > > Hello I recently upgraded from a single 770 to 2x r9 280x due to a sweet deal I found. I didn’t even think about it but crossfire isn’t supported in windowed programs so when I use unreal engine 4 editor I only get the performance of one gpu.... > **[Google](https://www.google.com.au/webhp?sourceid=chrome-instant&rlz=1C1CHFX_enAU680&ion=1&espv=2&ie=UTF-8#q=ue4%20crossfire%20sli)** > > Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for. ---
**Author:** ![atanknomore](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@atanknomore](https://forums.unrealengine.com/u/atanknomore)\ **Post date:** [February 25, 2016, 3:16pm UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/5 "2016-02-25T15:16:17Z")
Mmm apparently it’s the transition between the landscape and the skybox. Once the skybox is predominant, the frames go up again. Any ideas? ---
**Author:** ![atanknomore](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@atanknomore](https://forums.unrealengine.com/u/atanknomore)\ **Post date:** [February 26, 2016, 11:47pm UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/6 "2016-02-26T23:47:40Z")
More specifically, the transition between the landscape/level area and the skybox where there is foliage visible in the transition. This foliage is animated through standardized texture animation for vegetation. Has that ever happened to you? ---
**Author:** ![Bino](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bino](https://forums.unrealengine.com/u/Bino)\ **Post date:** [February 26, 2016, 11:55pm UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/7 "2016-02-26T23:55:05Z")
Nope it hasn’t. But I don’t really know what kind of scene you have. So it could be something you’ve created. - Have you looked at the shader complexity of the vegetation? - Does a blank project work? - Did you try without dual GPUs? ---
**Author:** ![atanknomore](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@atanknomore](https://forums.unrealengine.com/u/atanknomore)\ **Post date:** [August 19, 2016, 5:19am UTC](https://forums.unrealengine.com/t/huge-fps-drop-when-looking-at-the-sky-nothing/348498/8 "2016-08-19T05:19:01Z")
The Error was due to overdraw from complex Shader overlapping one another several times. I’ve fixed my materials and moved forward.