Obi fluid and VR

[josemendez]

Problem 1 Scale.
The scaling tutorial video shows procedure to reduce scale by scaling the solver. For me this works down to about 0.2 the scale of the faucet and bucket example. Any smaller (0.1 or below) the fluid is transparent- can't see it
I need the scale to be at the size of a sample vile in a VR scene that's based on 1 unity unit = 1 meter. That looks like its out.

You need to adjust the renderer thickness cutoff threshold accordingly. Very small particles are also very thin, so once their thickness falls below the renderer's cutoff threshold they won't be rendered. Simply reduce the threshold.

https://www.youtube.com/watch?v=W0ojzG5dzjU

From the video, at around 5:15:

Note that the renderer parameters are expressed in world space, so if you change the scale of your fluid using either method, you'll need to adjust the renderer parameters accordingly.

Problem 2 VR Toolkit
When making the bucket (in the faucet sample scene) intractable with the VR Toolkit, as soon as I "grab" the bucket, the fluid passes through the bucket.

This is called tunneling, and is present in all physics engines. We recorded a video specifically for this:
https://www.youtube.com/watch?v=ms0Z35GY6pk

I'm spending too much time on this.

Fluid simulation is a extremely complex topic. And any toolkit you can come across, no matter how simple, will take some time to get used to (more so if you're inexperienced in realtime physics). Expect to spend quite some time learning and adjusting to it.