Ocean Motion Inertia

[tjconnors]

I have installed the latest build of Phoenix 3 29028 and I still get this issue with the motion inertia turned on. No matter what I do it will always create these lines in the mesh. I have tired different animation setups, high substeps and mesh smoothing but nothing will fix this issue. I don't recall seeing this issue before but am I missing something?

[tjconnors]

I even tired the scene file from your ship in the ocean lesson to make sure. That file is doing the same thing.

[joconnell]

I got a few tips from svetlin about this - in our case we weren't making our grid deep enough to allow the water to settle - try doubling the height of your grid so you've got more cells and see if it helps!

[Svetlin.Nikolov]

Hey, Tom, is this the ship tutorial or the ship example scene? In the other scene with the boat, is there any rotation in the grid?

[tjconnors]

Ok I can try a higher depth tonight. The bottom image is the ship tutorial. The top image has a rotated boat but it does it in every scene I try. The top image still only moves straight along X.

[tjconnors]

I have tired making it 50% of the container but still does it. I also created a very simple scene and I still get the lines. Here is max file with a mov file to show the issue.

[Svetlin.Nikolov]

Thank you, I'm on it!

[Svetlin.Nikolov]

Hey Tom,

Please enable Display Unit Scale = Metric - this way you'd see that the simulator is only 50 cm deep, and the liquid is 25 cm deep with 50% fillup. The Z axis is also only 39 voxels, so the liquid column is roughly 20 voxels.

The very very low scene scale and the low resolution combined mean that the solver can never simulate this moving container with smooth corners.

The solution would be either one of these, or a combination:
- Higher scene scale - this way the gravity will not pull down the particles a huge distance on each frame and the solver would be able to stabilize them and keep the surface smooth.
- Higher SPF - the result will be the same as above.
- More resolution

I'm going to now check the ship tutorial scene.

There is a logged issue where rotating containers' borders don't behave correctly with ocean fillup, so this one remains to be tracked down and fixed.

[Svetlin.Nikolov]

Gosho.Genchev , could you please add the info above to the docs? Until I figure out how these ocean limitations could work automatically, they has to be watched out for...

[Svetlin.Nikolov]

tjconnors , I am starting the 004_final.max scene from the ship tutorial. Is this the one you are testing as well?

[Svetlin.Nikolov]

Hmm, this scene does not display the line using a latest nightly.




I'm gonna try with the example scene instead of the tutorial...

[Svetlin.Nikolov]

Okay, got the issue with the example scene:

[Paul Oblomov]

Well, with a lil ps help - there's disturbance in freshly created scene too

[tjconnors]

Yes I have tired all of those settings in a metric scene which were the first images I sent. And yes I used the max scene from the help docs. What is different with your scene that was clean?

[Svetlin.Nikolov]

Will ping you when I know more. Since it reproduces here, the rest is up to us...