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+--- Thread: Help Using Fluid in VR (HTC vive) (/thread-3214.html)
Using Fluid in VR (HTC vive) - curryrice - 02-12-2021
Hello.
I want to use unity to display a liquid on the screen in VR (HTC vive), but it does not show up.
It shows up fine in a scene without VR.
Do I need some special settings?
I don't know the cause of this problem, so please let me know.
Obi Fluid Version : 6.3
unity Version : 2020.3.16f1
Thank you.
RE: Using Fluid in VR (HTC vive) - josemendez - 02-12-2021
(02-12-2021, 02:09 PM)curryrice Wrote: Hello.
I want to use unity to display a liquid on the screen in VR (HTC vive), but it does not show up.
It shows up fine in a scene without VR.
Do I need some special settings?
I don't know the cause of this problem, so please let me know.
Obi Fluid Version : 6.3
unity Version : 2020.3.16f1
Thank you.
Hi there!
VR Fluid rendering requires setting up separate cameras for each eye. See our FAQ:
http://obi.virtualmethodstudio.com/faq.html
Quote:Does it support VR (Virtual Reality)?
Cloth, Rope and Softbodies support VR. For Obi Fluid, you will have to use separate cameras for each eye since the renderer does not support single-pass stereo rendering.
RE: Using Fluid in VR (HTC vive) - curryrice - 03-12-2021
(02-12-2021, 02:20 PM)josemendez Wrote: Hi there!
VR Fluid rendering requires setting up separate cameras for each eye. See our FAQ:
http://obi.virtualmethodstudio.com/faq.html
Wow!
I missed that section in the FAQ.
Thank you!
RE: Using Fluid in VR (HTC vive) - locque - 07-02-2022
Can you elaborate on how this one-camera-per-eye setup is supposed to work?
I can't get any fluid rendered as soon as I target the left or right eye on a camera, it just disappears. It works fine again as as soon as you set the target back to None (Main Display).
RE: Using Fluid in VR (HTC vive) - Epineurien - 07-02-2022
Gonna request more details too.
You need to setup separate cameras for each eye with a fluid renderer in each, right?
But in URP the fluid renderers don't do anything as it's the Obi Fluid Renderer Feature that does the job (at least that's how I got it to work in non-VR).
How do you setup Obi for VR in URP?
RE: Using Fluid in VR (HTC vive) - locque - 07-02-2022
(07-02-2022, 11:47 AM)Epineurien Wrote: Gonna request more details too.
You need to setup separate cameras for each eye with a fluid renderer in each, right?
But in URP the fluid renderers don't do anything as it's the Obi Fluid Renderer Feature that does the job (at least that's how I got it to work in non-VR).
How do you setup Obi for VR in URP?
I was wondering the exact same thing, seems like it's not possible with URP. I couldn't get any fluid rendered on the builtin pipeline either though, the camera-based fluid renderer stops working as soon as you target an eye.
RE: Using Fluid in VR (HTC vive) - josemendez - 07-02-2022
(07-02-2022, 11:59 AM)locque Wrote: I was wondering the exact same thing, seems like it's not possible with URP. I couldn't get any fluid rendered on the builtin pipeline either though, the camera-based fluid renderer stops working as soon as you target an eye.
What Unity version are you using? targeting a specific eye vs the screen should make no difference as far as rendering goes: it just changes the render destination, the entire render pipeline remains unchanged.
RE: Using Fluid in VR (HTC vive) - locque - 07-02-2022
(07-02-2022, 12:05 PM)josemendez Wrote: What Unity version are you using? targeting a specific eye vs the screen should make no difference as far as rendering goes: it just changes the render destination, the entire render pipeline remains unchanged.
Thats what I would have thought too, but unfortunately that's not the case. I'm using 2020.3.27f1.
RE: Using Fluid in VR (HTC vive) - josemendez - 07-02-2022
(07-02-2022, 11:47 AM)Epineurien Wrote: Gonna request more details too.
You need to setup separate cameras for each eye with a fluid renderer in each, right?
But in URP the fluid renderers don't do anything as it's the Obi Fluid Renderer Feature that does the job (at least that's how I got it to work in non-VR).
How do you setup Obi for VR in URP?
URP VR is not supported as of now, since Unity does not support using renderer features on a per-camera basis which would be required for this to work.
RE: Using Fluid in VR (HTC vive) - locque - 07-02-2022
Here are some pictures showing what happens when you switch the target from the main display to the left eye:
https://imgur.com/a/gV2cVfy
The shadow is still being rendered for the left eye, but the fluid itself is missing.