I’m finally back to testing boat wakes & foam.
I’m starting to get some nice examples that I will post here, but I have also some questions about unwanted things.
First thing posted:
- I have clear water. The simulation was done using “clear inside” option for the Hull object (closed object)
- There are some unwanted water surface “artifacts” that are probably due to the liquid mesh penetrating or not the boat hull (seen on the bow).
- I tried to use rendercutter by using the hull mesh. On the bow, it seems to remove a bit the problem, but I get a straight line in the sea surface.
- On the example scene posted on the documentation I noticed that you don’t use “clear inside”. Is this example scene not outdated ?
I can’t seem to reproduce the issue with the line on the ocean surface. Can you try rendering using the latest nightly build? Also which version of V-Ray are you using?
If the issue is still reproducible, send over the scene and we’ll take a look.
As for the “Clear inside” in the example scene, indeed it is not enabled but it shouldn’t be causing any issues in this particular case. Why do you feel the scene is outdated?
Thank you Georgi for the nice comments. I should be able to post some animated tests soon. I’m quite satisfied with the results now, espexially since I added motion blur to the foam and splaches.
Sorry, I forgot to mention my software setup. Windows 10, Maya 2018.6 and Vray Maya 2018 Update1, and Phoenix FD 3.14.00
I could try the latest Phoenix nightly build, but I guess I will have to ask for access first (which I will do now).
I’m trying right now a sim without “clear inside”.
As for the test scene, it was more of a question to ask if it might be already outdated as pretty all scenes seem to have been made under Maya 2015
Ah, the scenes are saved for Maya 2015 as this is the oldest version we support, they should all be working correctly.
If you have some issues with them or the result you’re getting is quite off from the one in the video, just let us know and we’ll fix it.
The birth of splashes can be controlled by the Birth Threshold in the Splashes rollout. You can try and increase that, but this will affect the rest of your simulation as well.
Another thing you can do is to use a render cutter object in the particle shader. This way you can create a dummy object that can cut away the splashes at the front.
The foam looks pretty decent to me. What is the issue you’re having with it?
Increasing the grid resolution will add more detail and through the Particle shader you can control the render size of the bubbles.
As for the line you’re getting with the cutter - can you send over the scene so we can take a look at what exactly the issue is?
For the diagonal line - try and increase the Off-screen margin. The ocean is generated only in the camera view, which can lead to problems when using camera motion blur, using reflections, using refractions with Underwater Goggles enabled, or when the ocean casts shadows on objects underwater. This option allows you to extend the ocean further from the borders of the camera view in order to solve such issues. The value is a percentage of the image size.
Try increasing it gradually as it will slow-down the render.
Thanks for the scene. The line happens because the render cutter is still not implemented for the Ocean render mode. Unfortunately this is still in the to do list.
As for the liquid that is penetrating your boat - this happens because your geometry has open edges. If you fix that and run the sim again it should render correctly.
Ohhh, I see - this is the displaced mesh that penetrated the geometry, not the liquid. Remember that you are displacing this mesh using the ocean texture, so it shifts left and right. What you can do is to use a Fade Volume to suppress the displacement near the hull - you gotta just pick the hull geometry there and it should work out at render time.
Looking very nice! You might turn down the foam pattern strength - if you look closely, you can see how the pattern forces push the foam apart energetically
