Small boat simulation - Long Ripple life on calm water

[Svetlin.Nikolov]

Ah, one more thing - the ocean and the particle shader should be both visible in V-Ray IPR. Which Phoenix and V-Ray versions are you using currently? Also, are you using V-Ray CPU or GPU?

[daniel_fisher]

We have got the foam looking how we would like by increasing /decreasing the particle size depending upon the size we are rendering so that side of thing is thankfully ok . The main simulation however is what is giving us the problems . The main sim object and it's material don't have any displacement modifiers or maps applied only an ocean texture displacement in the render settings of the sim object. For the purposes of trying to work out what is happening we have turned this off but the sim object still varies depending upon the render resolution. It is as if the isosurface level differs at different resolutions? I'm sure it's more complex than that but any help would be great.
Many Thanks
Dan

[daniel_fisher]

Ah, one more thing - the ocean and the particle shader should be both visible in V-Ray IPR. Which Phoenix and V-Ray versions are you using currently? Also, are you using V-Ray CPU or GPU?

We are using:
Corona 6 Hotfix 1
3ds Max 2021.3
phoenixFD_adv_43000_max2021_vray5_x64

[Svetlin.Nikolov]

Ah, dang, I gotta put my bigger glasses, of course you are using Corona. Let me try to break it here with the ocean toolbar preset. Isosurface mode should not be able to generate an ocean though, gotta check what it does with corona as well. Ah, and also, are you trying to preview it in Corona interactive then?

[daniel_fisher]

Thanks Svetlin, yes we are using Corona interactive to preview and the production at 4K. Thank you!

[georgi.zhekov]

We can't reproduce the issue on our side. Is it possible to send over the scene with 1 or 2 cache files so we can check it? You can either attach it here as a zip file (or use an online file service) or send it to the support mail with a link to this thread.

Thanks!

[daniel_fisher]

Hi Georgi,
Yes, sure no problem. Here is the liquid object only and I will send a wetransfer file of a couple of frames of the cache to the support email.
Many Thanks
Dan

[georgi.zhekov]

Thanks a lot for the scene! We got it. Will let you know when we find what is going on.

[georgi.zhekov]

Can you try with the latest Phoenix nightly build? Seems to be working correctly with it. Here is how to get one - https://forums.chaosgroup.com/forum/...nightly-builds

[daniel_fisher]

I will try this now, thank you Georgi

[daniel_fisher]

Hi Georgi, yes this works! So is there an issue with the latest release (not the nightly build)? We have a few animation jobs to submit to a render farm who have the latest official release?

[georgi.zhekov]

We did some changes in the nightlies and now Phoenix passes the mesh to 3ds Max in a better way - that's why it works correctly with the nightlies. Generally the nightlies have all the fixes and the latest addtions, but there is a chance that they are unstable at a point in time - so it is best to test if they work for your scene.

[daniel_fisher]

Ok, thank you Georgi. We will try a few production render frames with the render farm to check that our results match (as we are using the nightly and they will be using the latest full release) Hopefully it was the interactive renderer's results that were inconsistent with the production so the production frames will match.

Thank you Georgi