Niagara particles not working in VR mode. 4.20.1

Hi guys i can’t get Niagara particles to work in VR mode. I tried everything, reinstalling UE, making a new project with default particles…
It feels like there’s some kind of particle rendering limit or something, because i can see first 2 particles.
Note : (Cascade particles work fine) and i have the latest GPU drivers GTX1080Ti.

Heres the example in the editor

and this is when i run VR (Oculus)

250455-vr.png

I tested and found out that this problem happens when you create a project using a Vr template in 4.20.1.

I fixed this by turning off instanced stereo rendering. Niagara particles work now, but obviously this isn’t ideal, so I hope a fix for this is pushed soon.

Thank you for following up on this folks - having the same problem - installing 4.21 - hope it changes things!

Keeping Instanced Stereo off is your best bet for now. This issue is being tracked at Unreal Engine Issues and Bug Tracker (UE-61777)

Target fix set to 4.22. It’s a shame we have to double the rendering cost of draw calls to get a basic thing like that working.

4.22 is out and that bug got backlogged. That’s really sad for VR developers.

The Rendering Refactor made it so that ISR will need some work: “We have another ISR refactor planned for 4.23 that utilizes instance step rates larger than 1 which will clean up the code and fix Niagara particles as well.”

Thanks for the update, . Where did you quote that from? I’m curious to see what other news might be there.

You’re welcome! That was from an internal comment on the bug report.