Huge FPS drop when looking at the sky / Nothing

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1

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 :slight_smile:

2

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

3

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.

4

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.

5

Mmm apparently it’s the transition between the landscape and the skybox. Once the skybox is predominant, the frames go up again. Any ideas?

6

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?

7

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?
8

The Error was due to overdraw from complex Shader overlapping one another several times. I’ve fixed my materials and moved forward.