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Found 112 results

  1. I have tried a lot and i just cant understand why my particles are dying and volume is reducing. I am trying to make a washing machine animation with the water. Any tips? Any suggestions would be appreciated :)) untitled.avi washing_machine.hip
  2. Hi all.. I'm trying to find the solution, how to control water (or whitewater) shape behaviour around the floating boat. I would like to obtain shape like in top picture on the left. But my results always looks something like on picture bellow, (very extensive side ripples) which I don't want to. Nobody in tutorials or PRO courses doesn't explain how to control that behaviour, if I don't want leave simulation to work 'naturally'. I think it has something to do with the custom velocity values, but I had no good result with my experiments. I saw some tutorials for Maya's or Max's PhoenixFD, where was really good looking results. So, does anybody know, which parameter, feature or node is responsibile to control that, if I want to avoid natural behaviour and obtain the shape like on top left on the picture? ps: The top picture simulation made somebody in Houdini (all boat floats is 58 km/h) with some personal 'KA_wave' tool, which doesn't exist for commercial use. ..I can pay for explanation or shared example hip file..
  3. Hope you guys digg it! Cheers, - Tyler
  4. Houdini.School | Liquid SOPs

    Liquid SOPs is a new class focusing on building art directable liquid FX without actually using any simulation solvers. The goal is to generate the look and movement of liquid, but without the overhead and complexity of actual simulation calculations. So this means no flip particle simulations, no volume advection, not even vellum will be used in this class. Just good old fashioned ingenuity, procedural animation, noises, curves, VOPs, and of course some VEX to make it all work together. This class should get you to think about the mechanics of liquids, which will allow you think differently in breaking down that information into simpler ways that can be built with just geometry. Enroll today: https://bit.ly/houdiniliquidsops Teaser: https://vimeo.com/678063221
  5. What I want to achieve on my render: I know that I need very low particle seperation so the turbulent spots are crispy and visible. My test rendering with redshift: https://www.youtube.com/watch?v=CL8iC5EQaoY My Questions: - I don't use any ocean tools for this; just an emitter that hits the wavebreaker collision: Should I better use ocean tools instead plain FLIP and an emitter? - I used a 50m x 40m x 20m scale FLIP tank to somewhat get realistic scale with 0.04 particle sep. It took me about 4 hours to sim and mesh 150 frames. Is this overkill and should I go much lower on the scale? - Entagma made a tutorial about adding the turbulent areas of FLIP as an attribute to the material. I did the same but the white parts are flickering very hard for me when rendered. https://www.youtube.com/watch?v=DhqC13Z_hYc&t=774s Basically how can I reproduce the same look from the reference image with houdini and redshift? Many thanks in advance
  6. water tank rendering

    rendered with arnold GPU, 1 beauty pass straight out of the renderer
  7. Hello I am doing a unlimited ocean in Houdini. But for some reason I dont know how can I fix the issue where at the horizon there aren't any waves attached... (see screenshot). What is causing this? And how to fix this?
  8. Hello I have an animated Object and when I apply a hero rdb object then the animation is gone and my object is just falling down into the water... But I want it to float on the surface after it has touched down. How can I achive that? Thanks for advance
  9. Hey guys, Recently I faced the flickering issue on the flip simulation. This flickering problem appear when I simulate with custom collision wall. What I want to be is simulating with animated walls which around flip box without any flickering. Because Flickered particles cause flickering of White water and it looks very weird. Is there anyone who can help me? Thanks, in advance! collision_error_test.hip
  10. Hello I am working on a Ocean scene with a flip tank integration. Now I have rendered out the ocean with the flip tank simulation. And now I want to render the white water. But a few frames after the white water simulation started rendering, the rendering process just keeps crashing, and I dont know how to fix it. Or I do something wrong? Should I cache out the white water first and then hit render or how? And how I can create render passes of the white water, so I just can overlay the different render layers in a compositing software on each other and I dont need to mask it out somehow... Help would be much appreciated!! also, I have used the pop advect by volumes node and the bounding box is cutting away some of the white water, how can I fix this too???? Thanks!
  11. I'm trying to create an animation of a ship rising out of the water and simulate the water on it. But the animation is so fast that sails and thin ropes are not recognized as collisions. Perhaps raising the substep is a good idea, but is there any other way? Ideally, the collision should be as clean as this
  12. Hey I am trying to achive the effect of floating but with an animated alembic object. I have tried the feedback scale in the flip solver but this doesn't help me just nothing happening. So now I am asking here, if someone has an idea how can I make a animated object float in a FLIP Sim, help would be very appreciated. The object is the starship rocket stage from SpaceX if someone here follows spacex - it should land in the ocean near Hawaii - I've done a short animation but now I dont know how to make it float... Thanks in advance Flipbook_animation.mp4
  13. This is my first post. I'm sorry if I'm wrong about the conventions here. I'm trying to create an animation that goes from above water to below water. I want to make a splash when above water and a bubble when underwater. For the bubbles, I looked for tutorials on Youtube and found that most of them were created with polygons. I was thinking of using particles for the water, but is it possible to use polygonal bubbles for the water? Is there a better way to do this? Also, if you have any tutorials to recommend, please let me know. Sorry for my bad English. Thanks for your kindness guys:)
  14. Filling water tank

    Hi everyone, I have an issue about filling a water tank - my question is: how I can fill a wave tank emitting particles before? My problem it's when I start the simulation with a water tank all works fine but when I try to fill the same box with a emitter the fluid can`t get the same water line with the same particles amount. Here some screenshots and the hipfile. Thanks! water_fill_001.hiplc
  15. Hi, The problem is getting RBD Bullet pieces to floating properly: Icebreaker_fake_Buoyancy_Bullet_SpinningProblem.mp4 IceBreaker_Ship_PopForce_VexMask.mp4 im running into problem simulated flat sheets of ice being buoyant in a volume. I can get them to rise to the surface with PopFloatByVolume and also a fake popForce with vex using the pieces depth to mask the upward force. The problem is getting them to not spin around the packed bullet point per piece, and instead have proper per point of the mesh have force applied as per proper buoyancy would. So they lie flat once they get to the surface of the water volume! Struggling with the PopFloatByVolume spin settings, and PopSpinByVolume doesnt seem to play ball either. Im trying to go down the setPrimIntrinsic route, where i could blend slowly the rotation to be flatter as they get to near the surface, but im not hitting gold yet and would be great to know if theres a better route. any ideas or approaches would be amazingly appreciated. attached the hip file with where im at. IceBreaker_PopFloatVol_CustomVolumeInput_005.hiplc
  16. Flat Tank disappearing mesh

    I have a problem with the Flat Tank Meshing, when I reduce the influence scale at some point the mesh of the flat tank disappears and I can only see the Splash mesh. The problem ends when I Increase the influence scale over 2.5 but then it not seems water. The particles in flip simulation are correct and the particle separation value is really low. If anyone knows what can be the problem please HELP ME!!! I attach the flipbook to see that. Thank you very much.
  17. How can i achieve this sim with 8 GB RAM?

    hammer flip tank hammer smash flip tank I'm trying this sim with a person walking instead of the hammer guy, but because of my specs, nvdia 940MX, i5 8th gen, it's next to impossible. So I am searching ways to do it with a low res still achieving the ripples and smashes. Also, how can I make only the legs as a deforming body? I imported fbx animation. and selecting the leg geo and clicking the shell deforming body is what I am doing. Therefore only the selected mesh is moving and the rest is staying in the initial place. I just want to achieve this sim by hook or crook. Please don't tell me to up my specs. Obviously, I can't achieve ditto but If you have any idea how I can achieve this with low specs and still not miss out on the core of the sim I would be really glad. and please do tell how to make only certain parts of an fbx animation geo as a collision object.
  18. Strange water simulation

    Hey all, Something is strange with my water simulation. When I press on "Flip fluids from Object" and then pressing "Play", the "water ring" is falling instantly down. But there should be a constant falling water sim. Thats my first time I have this strange problem. How to fix this? Thanks in advance problem with fluids.hipnc
  19. Flat tank water line warping/sinking

    I am noticing a strange effect of 'sinking', or warping of the water line level of the flat tank around the back portion of my collision geometry. It's like a big invisible blob is pressing on the liquid surface. I have attached two cross sections taken from the back and the front of collision geometry. In the attached cross sections a discrepancy can be observed between the front and back relative water line level of generated flip sim. The red line represents the 0 elevation of the water line. The collision geometry is generated from a ~100m vessel. Has anyone encountered something like this before?
  20. 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
  21. Simple geyser

    I was trying to create a simple geyser in houdin, but not beeing FX my primary specialties I am a little bit stuck... I would like to make the geyser emit not constantly but over time with different splashes but not quite familiar on how to use chops or additional forces to affect the particles so I am quite stuck. I found few sources online but not really helping...so if anyone has any idea I am stuck at this Thanks test_geyser_v001.hiplc
  22. Hey wizards! So I'm working on a project and I'm tasked with doing an inverse whirlpool. I've tried several techniques like curve force and axis force but they become unstable and don't give the desired effect I need. I'm currently using pop particles to affect the flip and it works, but it continues to grow then it becomes unstable. I'm trying to recreate the effect in the pokemon video but I need it to run for a long time without being unstable. What would be my approach to achieving this effect? Here is my hip file that I'm working on, maybe someone can notice if I'm doing something wrong lol water swirl.flv smalltornado_unstable.mov smalltornado_unstable2.mov watertesting_forum.hiplc
  23. This is one of the FX development I did for the Chinese animated feature 哪吒 (NeZha). All the FX are done in Houdini using flip and custom airfield to generate the waterfall effect, rendered in Mantra and final comp in Nuke.
  24. water fill

    i want fill the water in bottle. But this flip source does not fill up. I don't know why can't it be filled. BOTTLE.hipnc
  25. Waterfall Bending VFX breakdown from 哪吒 (NeZha). I was responsible for all the FX and rendering FX elements. All the FX are created in Houdini and render in Houdini Mantra, final composite done in Nuke.