what is the problem here???

[themaxxer]

hi guys, i post here a pic with my river scene. again considering problems showing up a few times, again, and again. what is the issue with the mesh displaying in the wrong direction as you see in the pic? i did everything right since i work on this scene for weeks now. learning phoenix and it's parameters. the mesh should be equal with the river.

the other problem showing up, are these mesh chunks under at the bottom of the cage. i have a closed mesh. no unwelded vertices, no overlapping faces, no flipped polygons. can somebody explain how i can get rid of these mesh chunks?

thanks in advance

david

[Svetlin.Nikolov]

Hi, if this happens with the same scene you sent a while back, can you check if your input and output paths point to the same location?

[Svetlin.Nikolov]

We can reproduce the long mesh artifacts beneath the bottom of the river with your scene, but if your question is why the mesh is rotated - no clue but a path issue.

[themaxxer]

yes input and output are the same. it is the same scene, but i had to merge it to a new cleared scene, rebuild everything new because of so much problems and crashes. ok, thanks... but what are these artifacts at the bottom? why do they show up? i have these problems also in other scenes. why does phoenix mesh those chunks?

another question is... i can't go under a grid size of 1.1 phoenix crashes everytime. i really want do a highend scene pushing me, 3ds max and phoenix to it's limits.

[Svetlin.Nikolov]

With the scene you sent us, 1.092cm is 462x2148x294 = 290 million cells. Is this the resolution you are getting on your side as well? If yes, then you have pushed your pc way beyond the limits, maybe 32 gigs of ram can handle this, but especially with the FLIP solver, there is no need to go that far with the resolution. Try going to the Output panel and deselecting channels you don't use, RGB for example, and scalar speed, leave only the temperature, and eventually velocity, if you want to do motion blur.

[Svetlin.Nikolov]

Regarding the artifacts below the bottom of the river, we'll investigate and get back to you.

[tsetso]

Hi,

regarding the mesh chunks, I think they might be caused by the "Initial fillup", which is normal. In most cases these chunks are hidden by the riverbed geometry.

If you want to get rid of them you'll need to create a custom geometry and do the initial fillup manually.

Here's an example of such geometry:



Once you model similar piece of geometry you just have to:
- Right click that object - Phoenix FD Properties - uncheck "Solid object", so that you will be able to fill it with liquid.
- Create a PXHLiquid source and set it to "Brush" mode with discharge 100.

The result should look like this:



Best,
Tsetso

[themaxxer]

ok guys thank you for your ideas and answers. i think i understand now more what causes the problems. i will try it after lunch.

[themaxxer]

i have 32 gigs of ram... on a computer 64 gigs. yes i have a similar resolution about 290 million cells. yes but the mesh is finer and more exact when i cranked up the resolution. i will delete channels i don't use... thanks

[themaxxer]

did you use your modelled riverbed as a emitter. i mean emitting the particles? or did u just fill it up with a other emitter filling it? i doesn't work for me. did you stop the emitting at any frame letting the gravity do the job?

[tsetso]

The riverbed has a selection of polygons at the top that constantly emit water (the same as the river tutorial if you have seen it).
And the modelled geometry is used to initiate liquid for a single frame, then the gravity and the constant emitter at the top are doing the rest.
Here's a sample scene that you can use for a reference:

RiverCustomInit.zip

[themaxxer]

another question i have, after resim again and again in several different scenes, also other than the river. the half life of the foam... is it in seconds or what? it's hard to understand how it works. i read the help file... did tutorials.

[Svetlin.Nikolov]

Yup, it's in seconds. Is this the help file you are looking at: https://confluence.chaosgroup.com/display/P220N/Foam ?

[themaxxer]

left i want this foam...messing around with parameteres...can't get it run. why are the foam bubbles only in the mesh... my scene on the right... i want them to float over the mesh. is this only possible when splashes are enabled? do i have to use patterns or not? do i have to use b2b interaction or not? thanks in advance
kind david

[themaxxer]

sorry for the mess with the pictures,...it didn't work