Landscapes have bad performance in VR

Development Platform & Builds XR Development
1

Hey guys,

I’ve been trying to increase performance of Epic’s “Landscape Mountains” sample and in search of expensive objects on the scene, ended up deleting everything but the landscape.

Even after following all advises from “Virtual Reality Best Practices” and increasing LOD factor of the landscape, a get exactly same 45 FPS as with the full original scene and no optimizations applied.

I do have a descent machine with GTX 970 that runs all other UE4 samples pretty well.

Here you can see the wireframe of the LODed terrain, but for some reason, “stat engine” shows 42 millions of triangles still being rendered.

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8luqF5L.jpg
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Could you please tell me what am I missing? Is there a magical checkbox that fixes LOD and terrain performance?

I’ve uploaded the ziped project online (even after deleting everything it’s still 700MB!) with everything but essentials deleted so you could tweak it yourselves.

https://drive.google.com/open?id=0B26lv1Dw4KRHam85bEs0X1d2VTA

I’m using UE4.12.2 and HTC Vive.

Thanks

2

Is it tessellation? That would increase the tris.

3

I also tried swapping the material for the default one and it made no difference. Default material has no tessellation, right?

4

Hmm- don’t know what it is then. I’ve been using some of these assets in the background of a test level i made and it seems to run well.

You could give the Oculus forward renderer branch a try - it’s pretty fast.