Foam in my beach sim

[japetus]

I was following along with the beach sim tutorial with my own scene, and it went well enough, but I'm having a problem with foam below the ocean? The tutorial doesn't seem to have this happening. How would I remove the foam below the ocean surface? I'm guesing it has to do with the rise and fall speed of the foam? My foam also seems like it's really flying off the surface, are the two related?
Edit: I'm working in Inches

[Svetlin.Nikolov]

Hey,

That's right - the tutorial scene was not set correctly - we need to update it. The beach geometry should not be a deformed plane, but instead should be a closed volume. All obstacles interacting with Phoenix should be such closed watertight volumes with normals pointing outwards, otherwise you could get such an effect with a second sim running underground, or you could even have explosions of particles caused by open geometry. It's quite probable that this is the reason you have flying foam.

Give it a try with a closed mesh and if there are still issues, ping us

Cheers!

[japetus]

Sweet! Well the closed volume works much better, cuts out my water as it should with better foam particles and renders way faster!...but now that I mess with my preview settings more, it looks like those are splash particles that are under the surface not foam...should those be there? Seems kind of odd! They are causing the foamy look under the surface it seems.

[japetus]

I read the help files for Splash By Free Fly and saw this: " It is not recommended that this parameter be changed to a value other than 0.0 for ocean simulations because the main body of liquid might sometimes be in temporary state of free fall." so I'm turning my free fly birth amount 0 to see if that does the trick, even though it wasn't changed in the tutorial.

[Svetlin.Nikolov]

Hmm, this should not be related. Can you try turning off the splash preview completely and see if these are actually splashes? Splash should not exist underwater, so this is very strange.

[japetus]

Yeah I can toggle those splash particles on and off with the particle preview check box. If I set by free fly to 0,like I said above, to 0, they don't seem to appear at all. This gives me less foam on the surface though, but that might be good. I'm simming now to see what it looks like. I can send the file if you want.

[Svetlin.Nikolov]

Absolutely, please. This might be a bug that needs to be fixed.

Thank you!

[japetus]

Here you go! Hope you can figure it out! I may have turned down my wave force strength to 1 in this version, it was set to 2...

[Svetlin.Nikolov]

Got it! Thanks very much! From tomorrow's nightly the By Free Fly option will not produce splash underwater

Cheers!

[japetus]

Awesome!! Thanks!

[japetus]

Well after trying out the new build of Phoenix I realized that I had turned gravity off at some point......which was probably the source of many of problems. I readjusted my settings to be more in line with the tutorial and now things seem to be working very well indeed! I did have another question though about foam particles in the viewport vs the render. My viewport is getting so really nice foam going on but when I render out, there seems to be a lot less foam around. I am rendering the foam in point mode..

[georgi.zhekov]

You might need to adjust your settings for the Foam rendering in order to get a better result - you can check what the options do here - https://docs.chaosgroup.com/display/...ParticleShader

Try changing the Point alpha and the Shadow strength for start.

[japetus]

Ah, thanks! I also realized my foam size was so small as to be practically invisible, so I made it larger. Also tweaking the alpha helped too. I forgot those settings existed, I had to scroll down to see them! Finally getting a hang of aaaalll these settings I think!