4.14 VR Preview frame rate issue

Development Platform & Builds XR Development
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1

After updating our VR game to 4.14 (from 4.13) we are experiencing massive frame rate loss when we are playing in VR preview and there are particle effects on screen; these frame rate drops were not present when using the VR preview in 4.13.

117437-islandcapture_001.jpg
117437-islandcapture_001.jpg1920×1080 282 KB

There’s 3 main particle effects, all fairly simple (see image above) there’s a particle system in the volcano to emit smoke, and there’s two particle systems in the waterfall, one for vapour and one for the water droplets.
The Volcano has the most complex particle system, however it is still very simple (see image below).

117438-volancoparticles.jpg
117438-volancoparticles.jpg1920×1080 248 KB

All of the particle effects in this demo are GPU Sprites.

The testing machine specification is as follows:
CPU; i7-4790 (3.60GHz)
RAM: 16Gb
GPU: GTX 1080 founders edition
Motherboard: H81M-P33
OS: Windows 10 Enterprise 64bit
Direct X: DirectX 12
VR: HTC (retail)

Any suggestions would be appreciated.

2

Hello Jules86,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this frame drop in a clean project?
  2. If so, could you provide a detailed list of steps to reproduce this issue on our end?
  3. Could you provide the frame rate differences for each engine version?
  4. Could you provide screen shots of any settings that may be involved with this issue?
3

Hello Jules86,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.

Thanks,