Jump to content

Search the Community

Showing results for tags 'Fluid'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • General
    • Lounge/General chat
    • Education
    • Jobs
    • Marketplace
  • Houdini
    • General Houdini Questions
    • Effects
    • Modeling
    • Animation & Rigging
    • Lighting & Rendering
    • Compositing
    • Games
    • Tools (HDA's etc.)
  • Coders Corner
    • HDK : Houdini Development Kit
    • Scripting
    • Shaders
  • Art and Challenges
    • Finished Work
    • Work in Progress
    • VFX Challenge
    • Effects Challenge Archive
  • Systems and Other Applications
    • Other 3d Packages
    • Operating Systems
    • Hardware
    • Pipeline
  • od|force
    • Feedback, Suggestions, Bugs

Found 212 results

  1. Thin Sheet Fluid

    Hey everyone, so after my very long thread (https://forums.odforce.net/topic/44053-implement-kernel-maths-in-vex/) I finally found a solution. The setup works great at 0.05 res, you might have to dive inside the solver and change some parameters to get it work at other resolutions (especially to get the droplets). Here are some test : Emission threshold at 60 (depending on the situation, there might be some abusive expansion, like at the end on the rubber toy, but this seems impossible to fix when you want a full thin sheet) Stretch threshold at 0.75 / Surface Tension 0.5 Emission threshold at 15 / Stretch threshold at 1.25 / Surface Tension 1 Houdini default Flip with Surface Tension at 1 Crown test with 50 Emission threshold (problem with infinite expansion with liquid dropping from the collider) If someone has suggestion to improve it, feel free to tell me I'm still working on fixing the infinite expansion issue, but the emission threshold is doing great until 20-30 depending on the situation Cheers, thin_sheet_solver.hipnc
  2. Hello, I have set up a simple narrow band flip tank and am dropping a small object (cosmetics bottle) into the tank. The issue im having is on the first frame that the object collides with the fluid it shoots a bunch of random particles out that escape from the narrow band and then re-collide with the underside of the fluid and cause ripples on the surface that I dont want to create. The RDB sim is running at a time scale of 0.05 and gravity is the only force in the scene so its moving very slowly. The time scale for the flip solver is 0.1 to get some splash, but as you can see from the attached photos its not anything crazy. Can anyone suggest a way to either stop this from happening or kill these particles before they collide with the narrow band? Im not the most versed at flip so this may be a very quick fix Appreciate any thoughts or help with this!
  3. Hello , i have one issue with RBD Hero , it is possible to emit the same RBD hero object multiple times from particle or any objct without having to import the rbdobject node multiple times? Not packed prims only RBD Hero Object to have good floating objects on fluid tank. Becouse i try paked, prims and explode ater while, after few frames even when i play with feedback scale from Solver. Can you help me with a hit how i can manage this? Thanks.
  4. Kinks in stretchy flip sim

    Hi all! I've got a stretchy flip sim, which is for the most part working as I'd like. It's a fluid that is being pulled apart with stretchy bands being formed. However I'm finding that when the bands become too thin, they begin to kink in a strange way, like in the attached image. I suspect this is something to do with the high surface tension in the simulation. I've tried may different adjustments to the settings, including upping the particle count, and substeps, but without any luck, Any advice or steer in the right direction to resolve this would be hugely appreciated! David
  5. I'm currently working on a melting scene where I have a number of objects that need to melt into a combined puddle. The way Im currently doing this is by converting the objects to points, giving them their attributes for density and viscosity before theyre taken into dops to run through a flip solver. From my testing and limited understanding, I believe its not possible to have the fluids as seperate flip objects because I couldnt get them to properly interract with eachother in the sim. Now for values which have attributes in the flip solver its no problem to assign these per melting object but what I want to be able to control is the particle seperation for each. I can change the point seperation in the pointsfromvolume node, and link this to voxel size in my vdb from particles node in my meshing process, but how would I also link this per object in my flip_object node in dops? cheers
  6. Hey! Imagine you are slowly closing the water tap. then the water will decrease slowly. right !!!.. with reducing its thickness. That is what i am looking for. Animating the activation key on the "volume source node" would stops, right way. but i don't want that. Even animating the particle separation is killing the details of the shape. i want it to slowly stops with some kinda details. should i animate the scale of the object (which emits particle) or is there any other way to slow the emitting region or something. any one can help me please!? thanks in advance
  7. Good evening everyone! I learned some lessons and trained at home in Houdini, and tried to make realistic fluids together in vials for honey and chocolate, other types. I looked at pictures on the Internet and carefully studied how to create bubbles, and tried to make mantra materials. but it’s not like photographs of real honey bubbles. I uploaded - a rendering image and a project HIP. Help me how to create materials correctly? hdri.rar honey_colorls.hipnc
  8. 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
  9. Hello; In Houdini 16.5, I would like to add "viscosity" to a "Particle Fluid" simulation using a noise pattern, so in DOP I add a "POP-VOP" node (and AANoise in it ... ) after "Source Volume" which doesn't work. Where could I apply noise to the viscosity? Thanks for helping. Viscosity.hip
  10. beach tank flip streaks

    Hello! I'm having a problem when doing a beachtank. The motion of the waves looks good, but when the waves are retracting, there is a bunch of points that stops moving and forms a line that does not move. I've tried to increase the substeps of the DOP, but it didn't make a difference. My beach has a slope and it doesn't look like there is something else affecting it. Any help is appreciated, thanks!
  11. Problems with two FLIP objects colliding

    So I'm in the middle of creating a waterfall scene which is going to flow down some geometry and collide with a lake. I've set up both the emitters for the waterfall and the wave tank for the lake in separate DOP networks. However when i try and bring the particles in from the waterfall into the lake DOP the particles don't seem to be having any interaction, the waterfall particles just fall though my static objects even though they should be colliding. Any help would be appreciated Thanks. Edit* I've noticed that the bounding box in the flip solver was not including the waterfall particles which fixes the problem of them not moving however the particles still do not interact with the wave tank. WaterFall_New.zip
  12. Hey all, Ive been following a tutorial on how to transfer the UV's to simulated flip fluid and all was going well untill I added a remesh node to the transferred UV attribute which was supposed to smooth out the mesh to preserve the detail of the texture. Instead what has happened is that the UV's have gone from being seperate shells to having all their edges connected together. There is already a vertex split in the node graph which fixed the issue before I added the remesh node. Any help would be greatly appreciated, I've provided the scene file - thanks a bunch Melting_Example_v001.hiplc
  13. Is it possible to have a mutual collision between Pop Solver, with POP Fluid, and an RBD Object ? Something like the Feedback Scale we have in Flip Solver. It's a basic Setup, I have a box, blasted the top edge, and an RBD Sphere in there, and I emmit Pop Fluid and I'm trying to achieve mutual collisions, so to make the sphere float on the liquid surface
  14. Hello, I’m new to houdini, so I don’t know much. Is there a way to import particle fluid surface (water fluid displacement) into a displacement texture map? For example, oceanEvaluate node have "export to texture" tab and I can export displacement texture for FFT ocean. Is it possible to do the same for a particle surface mesh?
  15. Hey I'm currently working on a high res ocean simulation and I am really struggling with a volume loss of the flip simulation over time. I already did a bunch of research, but nothing seems to work so far for me - maybe I did not get everything right in the threads i did read. Here are some things that i tried to work on: - I tried working with the gas equalize volume Microsolver (I calculated my goal volume, but as soon as I started the sim got slower by the factor of 10 and "exploded" after the first Frame) - I tried decreasing the grid size, but to be honest I dont really think thats the issue - the surface looks already really clean with the default resolution - Right no I try to run the sim with "particle separation" activated, but it also gets really slow, and I think there has to be a better way Is that an issue that some of you already faced ? in the attached pictures you can see, how the water level is way underneath the water level, that I would get with the ocean spectrum preview (in the beginning it matches, and over time it gets worse) Would be great if you might help me cheers Felix segelschiff_ocean_sim_V007.hip
  16. Hello everyone. I'm trying to make a simulation of a fire hydrant spraying water at a high velocity. I'd like my effect to look something like this: FireHydrant1.jfifFireHydrant2.jfif I have the FLIP fluid behaving how I want it to, but the water looks too clear. I would assume that whitewater could fix this. However, I don't know which settings I would need to change for the whitewater to encompass the entire fluid shape like it does in my reference pictures. When I use the shelf tool, whitewater is only produced on the leading edge of where the water is first sprayed, like this: I don't really know where to start, and would appreciate feedback from anyone with more experience. My .hip file is here: HydrantHelp.hipnc
  17. Greetings, I have few microsolvers in my Flip Solver>Volume Velocity and I want to apply them to only 1 of my 2 emitters. Do I use a POP Wrangle after my MicroSolvers like (if viscosity > 500 then apply) or do i need to make some initial groups of my particles and apply the micro solvers to the favoured group ? To be more specific I use a GasMatchField and a GasStrainIntegrate with a GasStrainForce and I have 2 Volume Sources. If for example I go to my Popdrag in Groups I can see the option "stream_volumesource1" or "stream_volumesource2" but nothing like that in the microsolvers.
  18. CG Master Academy is searching for active industry professionals using Houdini for fluid FX to develop and teach an online course. Flexible scheduling with a 3-5 hour per week schedule footprint depending on class size. Minimum Requirements: must have 4-7 years of professional experience in feature film/animation and/or game projects and a current demo reel showcasing work specifically in procedural modeling. Preferable: Some experience teaching or training artists would be helpful in this role. Please send resume/work history, as well as a link to your website and/or demo reel, to jobs@cgmasteracademy.com.
  19. Greetings, I'm working on a simulation, kinda a classic one, with Viscous Chocolate been poured on Yogurt. Basically a Viscous Liquid Collides with a more Viscous Liquid. I did the Chocolate pouring and it looks really nice at first, now I need to replace the Ground plane with the Viscous Yogurt. I had the idea of using Narrow Band for the Yogurt surface and using double viscosity than the chocolate. But in my bad luck you can't Merge 2 Flip Solvers. I've read that you can use 2 Flip Objects though, but how do I import the Narrow Band in one Flip object and the other Flip Object points at the Emitter from Volume Source ? Basically, how do you have 2 different Fluids(with different attributes), one imported as Volume Source and the other as Narrow Band? Thanks in Regards
  20. Hello! I'm doing a school project, and I have to create something like a slime mesh. The main problem I have, is that I get a lot of flickering when I try to mesh the vellum grain using the particle fluid surface node. The same thing happens when I'm trying to mesh flip particles. Does anyone know how to get rid of this flickering? I've been searching a lot but can't find an answer. Thanks!! StickyFluid.mp4 bloodRND.mp4
  21. Hello; In a Flip_Fluid simulation, to change dynamically "viscosity" attribute in some parts of fluid, I would like to transfer viscosity, from an animated volume into the simulation. I tried to import viscosity attribute using a "Volume Source", but it doesn't work. Thanks for helping. Viscosity_01.hip
  22. Cloud tornado with water VFX breakdown from Chinese feature 哪吒 (NeZha), I was responsible for creating and rendering of all the effects using Houdini Pyro and Flip, render in Mantra.
  23. whitewater of emit particle fluid error

    I want to make white water from fast movig streams like water of fire hose but it`s strange go up in a straight line. how can I make it? its main water white water is made like this
  24. Flip Fuid Volume Loss

    Greetings, I'm doing a basic flip simulation where I fill a cup with liquid and then I rotate the cup to spill the liquid into another cup. Sounds super easy and basic, but after some time fine-tuning the collisions and the liquid I can say with certainty that my liquid volume is getting less and less like my particles are dying or sucked into the geometry. A searched a lot for a solution, like changing the Scale of the scene, or lowering the Grid-Scale ( CG Wiki ), or change the collisions but nothing really helps at all. thank you in regards
  25. Hi; How can I add velocity to a fluid points, to generate such a splashing sphere (like the image below)? Thanks for helping.
×