Heileif
How much VRAM does the GPU have? I have only seen the avalance scene running on a 3090 and it was fast, but closing in on maxing the VRAM.

I dont know about Vram it doesnt say anywhere I have Nvidia Quadro 5000 so whatever ram that includes. Also Houdini was always CPU based so I didnt expect it to use Vram at all.

BabaJ

Nikodim Fomich
This is the worst solver so far IMO because it doesnt work.

Depends on what you are trying to use it for and how you are doing that too.

I only have 64GB and mediocre video card too.

MPM worked perfectly for my purposes. And was pretty snappy too.

You see this is what baffles me. How can it work perfectly for you and not work at all for me. My container was like 5x5x5 and resolution was like 0.05 I mean its basic stuff.
I will do my best to figure this out as I do want this to work but I am so frustrated that I dont know what is causing these crashes.

I see this new MPM thing is suppose to do all of these things but I tested it on 2 powerful machines and the thing is totally useless. Even with SideFX setups. Namely it just stops working after 30 to 50 frames, simulation freezes and then all together dissapears from the viewport. I tried everything, switching settings, making it lighter. Mind you I have 128 GB RAM on bodth machines and decent (little on the older side) graphics card.
How do you people make it work because it looks so easy on the website and then it crashes and doesnt work in real life?

No one knows what it is. It's just a bug. It's so weird.
The only way to do it is to go to your Crash File directory and open Backup file.
Go to File, Open Crash Directory.

Does anyone know why these bugs happen when merging FLIP sim and Ocean Evaluate surface extending it with Particle Fluid Surface node?
Starts off fine but then Flip tank gets raised or moves and offsets itself? Strange, anyone experienced this?
Thank you

Is there a way to have whitewater sim on just a fluid surface mesh ? That is to say without an actual flip container that seems necessary to even get the WW off the shelf.
I have just some cached out bgeo.sc Vellum Fluid sim in a container with some nice wave movement but I was wondering if WW can be added to this or it has to be FLIP and the actual container ?

Thank you.

@jsmack Oooh I see. Thank you for clarifying that. I did think how not everyone has Labs stuff installed but then I thought maybe this one Labs node would be packaged with my plugin anyway but that's wrong way of thinking as HDAs are only scripts and they make use of existing, pre installed nodes rather than pulling in new 3rd party nodes. I might have to make my own spiral tool I guess.

@antc I see. Thank you, I will look into that. I was wondering what "::" was for. So far I was copying and pasting or renaming the entire HDA. Labs Spiral is just one node inside the HDA. SO would renaming the node itself do anything?
Thank you

Ok, @mestela that "Copy Defaults From Node" definitely did help with saving my changes. I just don't understand why nobody has yet covered this in so many videos and pages I read. I literally just learned this from you and I am very grateful. Houdini has some of this important functions very enigmatically labeled and sometimes in a very unlikely places

@antc I have managed to Duplicate the node in Asset Manager and change it's name and then I deleted the original. This time I named it Tentacle Master so that worked and it loads as Tentacle_Master1. I guess number 1 is Houdini's way of labeling nodes as every node has "1" after I load a very first instance of it.

I attached last version I added missing "Save to disk" function and changed a color of the initial tentacle to test saving option and it worked. Also "Grip" is finally OFF by default

Thank you so much guys. Let me know if this is how HDA is suppose to be or if it even works in your Houdini. At this point I don't know if it works anywhere outside of my Houdini hahah This is my first HDA so I am trying to figure my life out haha.

Also I tried to upload this on Orbolt and I was informed that there is some "dependency issue" because I used LABS SPIRAL node in my HDA. I don't know what dependencies are so do you guys know anything about that?

@antc and @mestela thank you very much. I was working on it for a moment and I got really upset that I can't finish it due to whatever that was happening (which you clarified) but in my defense I watched a ton of tutorials and read CG Wiki and some other stuff and I wasn't able to find any clearer solution. So I will provide the hda hoping that would make it easier for you to see what's going on. Basically it's a little simple plugin that I intended to be "quick and dirty" solution for creating tentacles or tentacle-like animatable procedural geometry that wouldn't require rigging.

@antc So based on what I see in properties it's a value of "0" for the Grip which I assumed was like boolean/True/False kind of a statement that would imply that it's negative thus OFF. Is this correct ?

Now interestingly enough you see this HDA as "KRAKEN MASTER" but once you import it into Houdini it appears as "Owner_kraken_master1" I don't understand how to rename it but I will give it another attempt with what you both suggested.

Hi guys I have been trying out Axiom solver and I ran into a flickering issue that I am not sure how to solve.
I am using Axiom 2 in a Trial Mode.

Here in the video it's perfectly shown what is happening, basically any higher resolution setting is having apparent flickering in the sim and if I lower the resolution, same settings, same sim, it seems to work just fine. I updated drivers on my RTX 2080 GPU, I tried different shaders or tested if it's a viewport issue, tried every setting within the plugin and a lot of substeps settings but nothing solves it.
Any idea on what might be going on ?

Thank you


https://youtu.be/LyYwC2Se2Uw [youtu.be]

I am having horrible time making an HDA. I watched ton of videos and I am doing as shown. I use ALLOW EDITING OF CONTENTS to unlock it, I make changes in settings and then I use SAVE NODE TYPE and SAVE ASSET, then I press MATCH CURRENT DEFINITION and changes are NOT being saved plus Houdini is just making weird changes in naming convention and my asset is called Owner_name of asset instead just what I just named a god damn thing. It's like does everything in Houdini has to be a bloody nightmare. Ugh..
So I exported the plugin on my desktop but it still carries this weird Owner_... name. Is it even possible to rename it? Nothing works so far, it's like you gotta be really careful when you are coming up with a name because it can never be changed after that. SO do I have to redo the whole thing and rename it or is there a way to rename it by like...typing a name?
And how is that done ?

https://www.youtube.com/watch?v=KwXZT3eaW4E [www.youtube.com]

Thanks

Omg thank you so much @ati. I was really losing my mind I am thinking "Its a cache node how hard can it be". And I couldn't read my older caches in like you said. Also I couldn't find any tutorial or article about how to load older caches. I am in between 2 projects so I was bummed when I couldn't load those older caches. Well that solves it thank you very much again.

@ati @buki, correct. My bad, I think I was so used to the interface that it made me upset when I loaded H19 this morning and found only interface to be changed around. I look it up and saw that it is actually upgraded (Mountain SOP) in different ways. Thank you for clarifying that. I am just a creature of habit.
Now I only need to learn how does one load cached file sequences into new File Cache 2.0

osong

Nikodim Fomich
Mountain, everyone's favorite node is ruined in looks and feel

you joking, right?

Nikodim Fomich
beyond frustrated with this new release I just want to render fire and it doesn't work

i fired up (amarite?) the bonfire preset, changed nothing, jumped inside the lopnet that is provided, everything works

Image Not Found

docs have improved, if you do not know how how to use a workflow, read docs. Also, Attila has a presentation "Sexy Pyro", as well as explosions stuff from 18.5 on H youtube channel. Watch it maybe?

Nikodim Fomich
Any ideas on how "cool kids" render fire in H19 ?

cool kids are on tiktok, next time ask them directly on that platform

Nah, I am using Mantra and if it's not a bug I don't know why is it not showing up in the render. I rendered fire million times in H18 so I know it works there. Hmmm...It could be a bug with my Render View or something. Mountain node, no seriously that node was way more authentic looking and feeling in H18. Now it's just another generic feeling Noise node Idk why would they do that.
Well thanks I will watch "Sexy Pyro", if rendering is the same for H18 and H19 but as I said in H18 I see the emission in the render and fire renders and in H19 it doesnt so I thought that pyroShader have been changed or something.

New Houdini is out and I hate it. Well I greatly dislike it. File Cache node can't load files anymore, it doesn't even see bgeo.sc files which strangely was the sole purpose of that node so that's weird. Also Mountain, everyone's favorite node is ruined in looks and feel. There's ton more issues like what's up with that weird Pyro Solver where everything is out of place.
But one thing that really bothers me the most is the fact that you can't just render stuff off the shelf anymore. Case and point would be fire rendering. It used to be where you can drag and drop stuff off the shelf and adjust shader later but in 19 not just that it doesn't work off the shelf but it doesn't render even after I apply shader. I used Bonefire from the shelf to see it in render and it doesn't render whatsoever. I applied different shaders (flames, fireball and such) I thought would result in fire and it deosn't even appear in the render. I am talking about Mantra of course. I don't know why Houdini is getting worse because I believe in if it's not broken don't fix it and a lot of nodes are now just messed up for no reason, like Pyro Solver. Way to mess up easy to understand node. Or file cache, Mountain and many more as I said. But I can learn new layouts but what I can't learn or even understand is why did fire rendering change? How do we render fire now? It's like I am relearning thus thing no, it's a waste of time why would you do this Side FX?
Anyway I am beyond frustrated with this new release I just want to render fire and it doesn't work.
Any ideas on how "cool kids" render fire in H19 ? Because I am only familiar with ways that it ALWAYS worked prior to new release. Any insight would be helpful thank you.
And I will for sure not use H19 for anything but I do need to know how to render stuff out of it for the client work in case I need to do it still. I work in 18 that is superior in my opinion but if anyone knows how to render fire with H19 let me know please.
Thank you.

Benjamin Lemoine
Hello
I think in this case you want more the axis of rotation that could be defined by the face the gun is touching than the Center of mass.....
then you could just create a ident() matrix and rotate it around this axe ...you will have to get also the centroid of the base of the gun .... selecting both the machine face and the base gun you could have something semi procedural ....
I have made a demo scene , check

Benjamin

WOW, Thank you so much for explaining it and providing a hip file because there is just no way I would understand what ident matrix is without an example. I don't even get it now. I don't know why simple things have to be this complicated in Houdini. I just want to spin thing around. Usually there is an option in other programs I used before to snap the object to be able to spin around itself. I wasn't gonna go elaborate like in your example in terms of movement I was just gonna have it in same place spinning around like a fan. I didn't realize it takes a page of coding for that simple task. Thank you for your effort and making this file. Gotta save this as an HDA for future because I have no clue what's going on in that Att Wrangle. Also I will for sure ask Side FX to implement fix for this in some update of Houdini. They are redoing already existing nodes (while making them much worse) like FILE CACHE and they don't have a node to do this which is a no brainer.
Again thank you. Will save this as a shelf tool so I can spin things around in the future.

Hey guys thank you so much for both useful responses. @tamte I probably didn't use Rxtract Centroid correctly as once I have centroid attribute I wasn't sure what to do next. @animatrix_ I just tried using Measure SOP and that gives me a @Centroid attribute but as I said, I am not sure how to proceed after that.
My setup is simple I have a .gtlf model imported from Sketchfab, I blasted a GUN that I need, imported it with OBJ MERGE in different GEO node and then expected to use $F*5 on Z rotational axis to make it spin around itself. This is where I start having issues with centroid. I tried adding it to a group and than trying to affect just that group in TRANSFORM SOP but I am not sure how to use this @centroid to make it spin around itself.
Thank you for all your help I am truly grateful.

@tamte Thanks man. That sounds like what I was looking for but I did try to take an object that contained velocity and turned it into VDB and it didn't work for some reason. Does velocity stay on VDB after it's turned from object with velocity into SDF version of the same object? Thank you for explaining it.

@Soothsayer Oh I know. Many things in Houdini would not work straight out of the box but I never used collisionvel usually "v" or 'vel". What is collision vel for? Thank you


@tinyhawkus Thank you for sharing that. Can you please further explain what did you mean by creating new field called collisionvel?
I would like you mentioned take an object, make sure it's "water-tight" geo, add Point Velocity SOP, turned it into VDB from Polygons (SDF) and try to use that as a Volume Collision Source in the solver. I know it's v on SOP level and vel in DOPS. Not sure where collisionvel comes in.

Thank you everybody.

I often have an issue when I want to animate an object rotating around it's Y axis such as a propeller or a fan.
Sometimes object is not perfectly on world axis and it doesn't rotate properly. I am trying to have a gun rotate around itself while shooting.
I tried everything. $CEX thing, $XMIN thing. $BBX thing. I tried to extract centroid with a bounding box. I can't get this object to spin on axis. Before I did it by hand painstakingly for helicopters but I want to find out if there is any procedural way to do this. Is there any method to get a perfect centroid of an object that is not in perfect alignment with the world ?
Thank you

sekow
glad you found it out yourself. It will stick now .
Think of Times Shift as the Clock and Time Blend the Portal it goes through, but beware to not put Integer Frames on active on the shift node.

Thank you. That's a good analogy, Clock and Time Portal.
Yes Integer Frames have to be unchecked to get to subframes. Copy that. Thanks for heads up.