r/Houdini Sep 09 '25

Announcement Reddit blocks Gumroad links without notice

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Hello Houdiners,

I wanted to give people here a heads up that Reddit blocks links to Gumroad site-wide. Posts are removed without any notifications to the moderators. We can manually reinstate them, but without any notifications it's something we have to manually dig around for.

This ban includes both posts and comments. If your product is on Gumroad or a domain "powered by" Gumroad, any post linking to it will be removed by Reddit (again, it's not us doing it!). We have no control over this ban and again the only thing we can do is manually "un-remove" posts if we notice them.

I recommend anyone selling digital products here to consider another service, like Ko-Fi or Paddle or Patreon, or at least link to something that is not directly a Gumroad page.


r/Houdini Jul 29 '25

Don't know where to start? Read the /r/Houdini wiki first!

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We get too many posts from new users asking "how do I learn Houdini"? The wiki now has the answers. Look there first before asking more specific questions here.


r/Houdini 8h ago

Animation Vibe coding

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Used redshift and houdini.


r/Houdini 18h ago

Simulation Vellum is always fun

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r/Houdini 1h ago

Help pyro smoke trails

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I want to create smoke trials like the 2nd pic, but the result I got is in reverse. The start is wide and end is thin.

saw this video but settings are bit different.

how do I do it?


r/Houdini 12h ago

Help Best workflow for simulating gold chains with heavy pendants in Houdini?

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I’m looking for a good workflow to animate/simulate gold chains like Cuban links, chain links, etc., especially when they have a solid/heavy pendant attached (like the reference image).
I’ve been using Vellum String for the chain and usually get pretty good results. The problem starts when I attach the pendant: since I need it to stay rigid and interact with the chain, its weight sometimes pulls the whole chain down and stretches it way too much.
What methods/workflows would you recommend for this kind of setup? I’m open to approaches other than Vellum String as well. Mainly looking for something stable that gives believable chain + pendant motion.


r/Houdini 23h ago

cloud and mountain

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a bit of an odd shape orographic cloud I've been working on. What's your opinion?


r/Houdini 5h ago

MGXS's Houdini Work?

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Anyone here a fan of MGXS's Art? I learned recently he created this alien beings all on Houdini & bought some of them. Does anyone know the process to create this art pieces?


r/Houdini 5h ago

Time Warp in a for loop

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Hello Guys!

I'm jamming my head against the wall trying to seep some points before instantiating a animated geometry.

What i'm trying to do:

A group of bird flying. I used MOPs move along curve so the points follow an art directed path.

Now I want to speed up some points so it reaches the goal faster as see in some flocks of bird flying, some of them just speeds up.

I was trying to do a time warp inside a for loop but i just cant get it to work...

Anyone has a tip or a better idea to achieve this effect?


r/Houdini 1d ago

Simulation process

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r/Houdini 1d ago

Wrinkle generator

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I tired of manually model wrinkles, so I built this.
Its consist of three nodes:
First - Cuts creator,
Other two - General and Chaos will make visible wrinkles based on the cuts.
I think I spent a week or two creating and debbuging this HDA.


r/Houdini 22h ago

Help Voulme Source keeps resetting?

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When I use volume source in the flip sim, the 'initialize' section keeps resetting (getting back to initialize position). And the flip system doesn't work. I updated the software thinking it's a bug but no change. Anything that might cause this? Thanks!

PS: It works when I switch it to a pop source instead of volume source.


r/Houdini 2d ago

Simulation Puddle FLIP simulation with short breakdown

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Just a simple old FLIP simulation that I made while exploring FLIP


r/Houdini 23h ago

NEW USER Cannot find Unity Houdini Plug-in on Linux despite downloading it.

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Hi all.

I have been trying to install the Unity plugin into my project but I have no been able to find the .unitypackage file in my folders at all, despite the fact the Houdini Launcher says it is installed.

I am on Linux Mint, the documentation says to go to \opt\hfsX.Y.Z\engine\unity. X.Y.Z to find the package, but there is nothing inside of that folder. I have two versions of Houdini installed, 22.0.368 and 22.0.409 and it is in neither of those folders.

In the launcher, clicking on the "Details" for the plugin, it says that it is in /opt/sidefx/houdini_engine/Unity/X.Y.Z , but the .unitypackage file isn't in there, and this seems to be an unrelated folder.

I have already tried deleting and reinstalling the package and the Houdini version itself, none of these things have worked.

I am paying for Houdini Indie so I am under the impression that I have access to these plugins.

Any help figuring this out?


r/Houdini 1d ago

Help Volume Loss flip sim

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Hi!

I’m having an issue with volume loss when trying to fill a PET bottle using a FLIP sim.

I’ve tried:

Changed Volume Motion to APIC (Swirly)
Increased Max Substeps to 5
Changed Separation Rate to 0.5
Increased Grid Scale to 1.5

I’m not sure what’s causing the issue. Could it be that I’m working at too small a scale?

Any ideas what I might be missing?


r/Houdini 2d ago

Simulation Apple Slow Motion Splash | FLIP / Karma XPU

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Some surface tension tests I started a while ago and finally decided to finish up. The main reference was typical slow motion commercial stock footage of fruit.

Used proximity masks against the apple colliders and ground to dynamically adjust viscosity, surface tension, and forces to simulate adhesion. A simple wetness map solver was used to drive roughness and diffuse map parameters during render.

Apple models are free 3D scans.

Rendered with Karma XPU.


r/Houdini 2d ago

Offering free Houdini help / demo reel reviews in exchange for English practice

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Hi everyone 😊

I’m a French Senior FX Supervisor with 10+ years of experience using Houdini. I currently lead an amazing FX team in a French studio. Before that, I worked as an FX TD, and I’ve also been teaching Houdini for just as long.

I’d be very happy to help with anything related to Houdini or VFX, for example:

- demo reel / portfolio reviews

- all-level guidance and Houdini support / debugging

- lessons on effects / procedural modeling / TD work

- mock interviews

I’m not looking to be paid. My main goal is to practice speaking English with native speakers. I also need to record a course in English as part of the Houdini Teacher Certification process.

If you’re interested, feel free to comment or send me a message.


r/Houdini 2d ago

Snake Sheds its Skin

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Hi everyone, I wanna make an FX snake shed skin. If anyone has an idea, let me know. Thanks in advance! The link below is a reference

https://www.youtube.com/watch?v=xDiL2zIFYuA


r/Houdini 3d ago

Tutorial 3 new ways to relight gaussian splats

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r/Houdini 3d ago

smoothing/blending/averaging between objects normals where they intersect

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this video shows a nice way of doing this in blender. I am aware of the dirt skirt method, but that feels a bit clunky compared to the geo nodes version...

... how would you approach this in houdini?

https://www.youtube.com/watch?v=RCQAwDyDO0o


r/Houdini 3d ago

Can anyone explain how to create this energy/ribbon effect in Houdini?

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Hi everyone!

I’m trying to recreate the glowing blue/purple energy effect shown in the reference image.

I’m mainly interested in the thin energy trails that flow, twist, and create those looping shapes around the main energy line.

Can anyone let me know how to achieve this effect in Houdini? I’d really appreciate it if someone could explain the workflow or point me toward a tutorial.

I’m thinking about using curves, particles/POPs, noise, and Sweep/PolyWire, but I’m not sure what the best approach would be.

If anyone has done something similar in Houdini, could you please let me know how you would approach it?

Thanks! 🙏


r/Houdini 3d ago

Help cant make curveu work

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I was creating a plant following a tutorial, but I can't seem to limit the jiggle effect using a curve. The branches are supposed to be attached to the trunk, but for some reason, they are out of sync.

I tried everything and still cant figure that out


r/Houdini 3d ago

Help How do you work with scenes in Houdini and Cinema 4D?

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I used to work with Houdini for FX with an Alembic of the scene made in Cinema 4D. The thing is, now I will start doing all the stages except maybe render. In addition, I should use assets modeled and shaded in Cinema.

Which pipelines do you have? How do you work?
Is there a way to send the materials from the model if both of us are using Redshift?

Thanks.


r/Houdini 3d ago

Scripting How to make string group in nearpoints() - before I forget and to help others

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string gr = sprintf("@name!=%s", s@name); 
int pts [] = nearpoints(0, gr, v@P, ch("radius"), chi('maxpoints')); removevalue(pts, ); 
i[]@pts = pts;

Before I forget - wanted to write this down in case it helps someone. I forgot how to do this, tried searching hard online and remembered somehow so wanted to write it down.

How to make a group in nearpoints by removing same attribute from possible neighbors. Warning that this is slow though, so be sure to only do this once, or manually delete similar neighbors after the fact in a for loop.


r/Houdini 3d ago

Active isnt working.

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I am using an active bound on RBD configure and for some reason it doesnt seem to be telling the glass to be active, when ther bound is turnt off all is fine however when I turn on the bound its almost like the glass geometry included is inactive.

Doesnt move when simulated.
Does move when simualted.
Frame 7 With bounds
Frame 7 no bounds
Node tree for glass only active.

For some reason it stopped working randomly and i havent been able to work out why,