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Found 176 results

  1. Hi all, I've got a little issue with a flip sim I made. It's a very simple effect actually but I don't know why.. It doesn't work properly! There is a flip fluid emitter inside a voronoied (and exploded) sphere. And I want the fluid to explode and collide with the sphere; Very simple, isn't it? The other thing is, the sim has to be in slow motion. So I made the sim in 100fps (for now). You can watch the result with the .mov below Really, I don't understand why it doesn't work. There is a weird move when flip collide with the sphere... I assume it's about velocity issue but I can't fix it... Here is the hip file too. Could someone help me about this please? Cheers, filp_test_issue.mov flip_sim_issue.hip
  2. I have a smoke sim. I want to reduce velocity in the area inside of small box (like in pic). I want to have opportunity to fill this area with custom velocity. Thanks.
  3. Hi everyone, I'm quite a beginner in Houdini, so maybe someone can help me with this issue. I'm trying to create an erupting volcano with Flip Fluids (the lava, not the smoke), so I modeled a geometry which I'm trying to use as a collision in the DOP network. Now, when I'm trying to use the fluidsource SOP I get some weird artifacts and can't really manage to get a decent collision SDF volume. One thing I've noticed is that the new VDB volume is really fast and gives me a very good result, but even after I've used vdbconvert to convert my VDB to a default houdini volume I couldn't use it as a collision in DOPs using the sourcevolume DOP. (Please check my attached pics.) Are there any tips on how should I handle this problem? Is there a way to make this VDB volume usable by DOPs or ar there some parameters I can tweak that make the fluidsource SOP output a good collision volume? Thank you.
  4. Boat Fluid Collision

    Hello,guys! Have a problem!I must do something like this: https://vimeo.com/37536300 Trying working with force above the boat (but after collision with box boat comes under water), and try to change density or mass in RBD Object. So please if you have some idea post it=)
  5. Flip Fluid Cache

    Hi guyz, I'm currently working on a little fluid explosion type effect. For that I cached out my simulation, and I would like to now cache out the geometry that gets generated, however everytime I start my caching (using rop outputdriver), it only caches a few frames until it crashes. It seems like it is running out of memory, but I'm working on a machine with 32gb ram, and it always caches a few frames until it crashes. Do you know if there's a way around this? Thanks in advance Sustaxata
  6. Boat Ride - Flip Fluid R&D

    Hey guys! This quick Flip Fluid R&D was aiming to create a fairly realistic Boat Riding simulation in a large scale water. The video contains a breakdown with some information about my system specs and my simulation settings. The end result didn't come out as good as I wanted to, since I wanted to have more particles and higher render settings, but I didn't have a lot of time working on it and my laptop wasn't able to handle more particles in the given time period I had for creating the effect. But all in all it was a good exercise and it was a fun little project. SOFTWARES USED: Houdini FX, Nuke, After Effects CREDITS: Animation, Simulation, Shading, Rendering and Compositing was done by Laszlo L. Ujvari aka. Myself Boat model was downloaded from 3dmodel.domawe.com Music: Zero7 - Waiting Line Thank you for you attention! Hope you enjoy!
  7. Hello, I am seeking the way to generate normal to points particles for get proper reflection/refraction, i have tried using add point node with normal but is not proper one. Probally is with vopsop generating with volumesample from fluid surface and transfer into point but i dont know the good way to do. any know that? or any link about that? thanks in advance!
  8. water curtain FX

    Hi Everyone, I am trying to create some water slide (something looks like a water curtain) effects based on this video: www.youtube.com/watch?v=I3SE2SWb4ac Can anyone help me to start ? Thanks
  9. Particle Fluid Morph Effect

    Hi guys, I am trying to achieve the fluid particles fall down to ground and deform into some shapes, like the fluid morph effect in the Houdini demo reel 2010. (https://vimeo.com/14012237 First 10 seconds) So how to morph fluid into geometry? Thanks.
  10. My FLIP stopped moving

    Hi, I've been trying to figure this out for a few days, but no success. It was a sceen with flip simulation that recieve vel from curve. Somehow my flip decided to completely stop moving around frame 287. I use Houdini 13.0.237 Thanks custom_vel_test.hip
  11. Hey guys, Just having a bit of an issue that is puzzling me. I have noticed that when you emit particle fluids from an object, it only emits from the object surface. I have attached an example image demonstrating the problem I'm having. I have set up custom velocities which will need to be applied to the interior also. So is there a way emit from an objects interior as well as surface, I have tried a couple of things such as converting the object to a volume and the scattering point but i can't seem to get the particle fluids to source from the points. I have had no luck so far, so any help would be greatly appreciated Thanks
  12. FLIP smorganic/sheeter effect?

    Hi, Is there a way to achieve this effect in H? https://vimeo.com/12992186 http://www.fusioncis.com/pr_smorganic.html
  13. fire from the barrel

    Hi guys, check it out. https://vimeo.com/70717919
  14. Hey guys, I am current working on a water explosion effect/large splash, below is a video of where it is currently at: https://vimeo.com/69691104 I pretty happy with the way it is looking at the moment, but as you can see it is hitting the edge of the container. Instead of re-sizing the container what I am wanting to do is kill/reduce the velocities as they get closer to the edge of the container and I want it to fade down over a specific area. I can kill off the velocities in a certain area using a pump object which multiplies the velocities it interacts with by 0 therefore resulting in a velocity of 0. However this happens very abruptly (as soon as it hits the edge of the pump object). So what I'm wondering is, is there any way to add a falloff to a pump object or drag force's effective areas? Thanks
  15. Hi guy, I am currently creating an explosion effect underneath water using FLIP fluids. So there would be lots of water thrown up in the air very quickly, however I am encountering an issue. There seems to be some sort of clipping going on within the fluid container. I have attached a couple of images so you can see what I mean, it also seems to be worse the lower I have the separation set. Does anyone have any idea what could be causing this and how to stop it from happening? Thanks in advance
  16. flip fluid surface tension

    I've been playing with flip fluid for a bit now and the one thing I can't seem to figure out is how to enable surface tension in the simulation. Adjusting the surface tension of a liquid is something I do pretty often or have the need to change (when I'm working in naiad or realflow). In houdini I thought it would be an easy setting to find, either set on the flip object or set on the solver but I doesn't seem to exist? Has anyone ever been able to simulate surface tension with flip?
  17. Heya, We have a few shots in our short film that i'm looking to get some input on. There are 2 shots - A spaceship crashing into the moon surface, and another of it sliding and coming to a rest. Im am mainly a Maya guy but am slowing get the hang of Houdini. Having a play around in both Maya and Houdini the are a few options to deal with this - and Im looking for thoughts on how to create a dynamic moon surface can provide an impact effect like this: So far I've dabbled with rigid cloth tests for ground deformation on a slide and flip fluids for the impact (but the retention of shape has got me a bit baffled).. Any body have experience with such an effect shot and able to provide some guidance - that would be awesome. Ollie
  18. Particle Detection

    I am trying to find a simple example of fluid or particle detection. I want an item say a box to emit smoke when simulated water hits it.
  19. OceanFx continous wave motion

    hey all, I use the shelf tool to create a wave tank (houdini 12.5) and I notice that the wave motion velocity is only acting at the first frame. What can I do if I would like to keep this velocity affecting the flip fluid until a desire frame? I saw a vel volume under the initial watertank geo and thought it could be use with a field force in dop, but when I try to use a sop vector field, it tell me that it's not a volume? Any better idea, I'm still new to houdini so maybe there is others ways that could be more effective. Thanks Doum
  20. Hey guys, I'm trying to do a simple fill. I have nothing fancy, just a very simple scene of a box(emitter) emitting fluid inside another box (container). All geometry is closed and very simple. The container fills up and the fluids collides like I would expect, but as soon as the fluid reaches a fill line that is level to the emitter (in Y axis) the fill line stays the same. I was expecting the liquid would keep emitting and fill up the entire container until there is no more space left inside.. but it just emits up to the same level as the source, and will not rise any higher. I tried setting up the simulation and sources using my own setup I'm used to in dops, and then tried it using just the shelf tools for safe measure but the problem is still the same. Has anyone ever experienced this before?
  21. This is proof of concept for simulating water inside of air field. The only difference in simulations is the presence of that air field. Done with standard Houdini flip tools. Inspired by ILM's Siggrpah talk on "Battleship". See the huge difference and much more realistic behavior. Watch it here: https://vimeo.com/57182252
  22. Hi everyone, I'm looking to build a simple glass fill animation but I've stumbled onto a problem before I could even begin the animation. I'm using a flip fluid that has some initial data from a SOP object. I've also made a glass that I want the flip fluid to collide with. I had some problems generating a valid SDF for the collision, but I have seemed to solve that by adjusting the offset on the isooffset node. If I feed the generated collision SDF to the flip solver, the particles start to behave in a weird way. They seem to remove themselves from the sim when they touch the glass. I've added an image demonstrating the problem in 3 frames and is also showing the collision geometry. Can anyone point me to the reason why the particles are disappearing? Thanks Glass.hipnc
  23. Hey guys, I'm just running a little fluid test and I have noticed that a rhombus shaped 'particle' gets created a few frames in to the sim and moves along a curve in the x-axis. It' isn't a flip particle/point because when I look at the particles in my sim it isn't there but after I append the particle fluid surface it appears. This isn't the first time I have bumped in to this rogue little element so i'm wondering if I am just being a buffoon and forgot to turn something off. Anyone know what the hell this thing is? Cheers errorFlip.avi
  24. oslo - showreel 2012

    Hi guys. This is my showreel for 2012 year. Mostly all was done in the Houdini. https://vimeo.com/53967225
  25. Nutlet 2012 VFX Reel

    HI, I post My latest on Viemo: https://vimeo.com/53734966 I am looking for a position as FX Artist or Jr.FX TD. Here is My Web www.nutletvfx.com And my Mail: vfxinnut@gmail.com The last shot was made in 2011 by using maya fluid for tornado simulation. And others is made by using houdini and mantra. The First two shots are FLIP fliud simulation. The third, ocean rock and splash, is POP EFX. The shot "helicopter rocket and explosion" is made by using my Smoke tool. There is none fluid sim in this shot. And the idea of this tool is to render metaball as volume with pyroclastic texture. Hope you like my reel. Thanks for watching!!