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Found 74 results

  1. I currently have a Pyroclastic flow sim that I made by using a particle sim, caching it with a DOP I/O node and then into a smoke sim. I works great and as I want it to. However as soon as I try and delay the sim to any frame it breaks either the particle sim or the smoke sim or both. I watched hours of vids and tutorials trying to figure what I've missed but every way I've found, including several suggestions I found on here, have failed. I've added a bunch of photos below of the how I've set it up and if anyone could tell me how they would go about delaying the simulations to a certian frame or something I've done wrong I would be enternally greatful. If I need to add any more detials please let me know.
  2. I've been working on a Volcanoe Sim. I started off with a 20000x20000 size heightfield (Image: Heightfield) then I converted the Heightfield to polygons so I could use it for destruction and resized the terrain so my computer could handle the RBD and Pyro Sims. I now have two problems I haven't been able to solve the last few weeks: How can I apply the the texture so its consistant over the multiple parts of destruction. (texture is made in Houdini COP2 node) How can I transfer the atrributes for bedrock, debris, etc over to my smaller polygon model to use for scattering rocks and trees. Not even sure if I'm asking the right questions, any pointers or advice would be awesome.
  3. Hello! Thanks in advance for the help... I have an alembic object that is animated, and I have added a VOP Noise node to stylize it. The problem is that th enoise is setted up at world scale, and when the geometry moves, it doesn't have the noise pattern stuck onto it. I would need the noise to be in object space, and I don't know how to set it up. I've been doing research for days and I've com across to a posible solution, but it is not 100% exact. I have attached some pics of the current setup and where it is giving me some errors. Thanks!
  4. Hello, I'm looking for help breaking down this tutorial, specifically the cable generation part, which starts around 26 minutes in. Are there other resources that go more in depth into point-cloud based path searching algorithms? I would like to achieve similar results to the video and be able to generate non-intersecting cables that can be warped around an asset. I know this tutorial is older, so I'm wondering if there is a different way to achieve this with a current addition of houdini. Thanks for the help!
  5. 32GB Ram 3200mhz ryzen 5 1600 Hi again guys. Basically I have been struggling a lot with cacheing a simulation. I´ve tried .bgeo .sim and multiple resolutions on the pyro I would hate to keep lowering the res because of ram issues. I diseabled "Cache Simulation" and I still keep on feeling my Cache. I dont mind waiting days for the cache if necesary (it is a big simulation, probably 40 meters long I guess) and to be honest, I might not know in depth how to control pyros. Hopefully you can help me here
  6. Hello! So I have been Having lots of problems to setup the pyro sim on a large scale. Somehow I cant manage to understand the propper settings. I would love a result similar to this: The size of the my sim is 1:10th of the real size because as I make the sim bigger the problems also get bigger. I guess it has something to do with the source density and the smoke object Take a look on how awful it looks down below (I am quite new to this soft) I am leaving the whole proyect full of notes so you have an easy time helping me Thanks a lot and I am looking forward to learning. cya NaveVolando.rar
  7. asking for kind help with sim

    I have a scene with destruction but the problem is that when the collider moves through the geo, some pieces randomly break off, some simply don't. It works well when I disable other parts of the geo but when I enable all 8 geo groups nothing works properly. Some help would be gladly appreciated, Thanks! I have attached a playblast and scene file playblast.mov demolition_setup_wholehouse.hipnc cottage_fixed.FBX
  8. Hello everyone, I am quite new to Houdini and currently working on a project to generate a dripstone cave. I thies processes I wanted to try out different approaches to generate dripstones. Currently I am using pop simulation but I would highly prefer to have a fluid simulation for the stalagmites. I need to create a Fluid that behaves a bit like wax and "freezes" / becomes solid as soon as it impacts with a surface (not instantly but after some time). Furthermore the next "drop" should solidify after touching the first drop and so on. Breakdown: 1. One drop at a time (like a dripping faucet) 2. Each drop should become solid after touching a solid object/ or the previous solid drop 3. They should stack up to form a pillar/stalagmite like structure thanks in andvance, Denis
  9. please watch this video : https://vimeo.com/172598946
  10. DOP to POP

    Hi guys! Just looking for a little bit of help, to see if what I am trying to achieve is actually possible and if it is maybe someone could assist me in figuring it out! I have attached my file below, I am attempting to make a Volcano react. This is the reference I am trying to copy to the best of my limited abilities! https://www.youtube.com/watch?v=9Plj4b79cwg My question is in regards to the node named SIMULATION, ignore the first DOP for the first smoke. I am working on the out put from the lava, now everything looks horrible, but I am trying to get the set up to work so I can edit things all at the same time (Uni assignment, short time frame, was recommended to do it this way.) Anyways I have the 'Lava' moving kind of how I would like for now and I now want to take the movement of the lava and turn it into particles to put into a POP to create small particles/sparks. I am certain this could be done. But I cannot wrap my head around how to achieve it, I got it done for the secondary smoke from the lava plugging the output into a pyro, which I haven't edited yet so that reaction is a bit of a mess. But I want to figure this out before moving on! Any help or recommendations would be hugely helpful! Or even if you know of any tutorials that walk through this? As I haven't come across any.... Thanks! Assign07e2.hipnc
  11. I usually hit F1 for help. I just hit the question mark in the upper right hand corner for the first time, and now "help" no longer pulls up "help," but a tab that searches Google instead of the Houdini help. Since that happened, now it does the same for hitting F1. I've shut down and restarted and it's still doing it. (The tab also tells me it's using an older version of Chrome, which my outside-of-Houdini browser is not.) How can I get Help to start showing, well, Help again? I'm running Houdini Indie 17.5. Thanks!
  12. Flip Sphere Motions

    Hey there, I'm trying to replicate this setup: Liquid Sphere Based on my scene, I have a sphere and the particles are generated from it with iso offset and particles from volume. Within FLIP, I tried to control the velocity with pop forces (POP force, pop attractor and pop axis force) and got somewhat of a swirly motion but the in the reference video, towards the end you can see the fluid is ground around a torus like motion and the shape as well Any pointers on achieving this? HIP file attached included. Thanks! SH02_Water_v02.hip
  13. Plane Smoke Trail

    Hey guys, Trying to do a smoke trail simulation similar of a jet stream. I've attached a sample hip file below of my current setup. My plane is static and the camera is animated. I've isolated the engines and use it to do a particle simulation where the particles are being blown away with some minor noise and each particle is given a lifespan so it dies and doesn't stay too long. Originally, the particles are being turned into density and be used in DOP with smoke solver for simulation (add disspate, turbulence and disturbance) to get the look of smoke trail but the results isn't really working and not what I'm looking for. I then tried to use the particles as density and just piped into cloud noise to randomize the density so it looks okay-ish but my question is it possible to get a fairly decent looking smoke trail with my setup or is my setup direction wrong? Thanks Sc01_SmokeTrail_v01.mp4 AirPlane.hip
  14. Hi all - novice C4d user here trying to comprehend Houdini. For an Ocean scene, does anyone have recommendations for how to produce micro-organisms / detail to ocean waters such as the following: How does one create these floating 'bits' that create real detail and life to an underwater based animation? Thanks in advance.
  15. Hi, I'm currently working through Steven Knippings Applied Houdini Rigids 3 series and just got a bit stuck at the section where he converts hard constraints into glue constraints using a Prim wrangle inside a SOP solver. I've looked into the geo spreadsheet and it seems to do the conversion but the problem is when this happens the strength should be set to -1 and never break apart but instead all the pieces break apart and go flying. Tried messing around with different strength values and methods but can't seem to figure it out. Any help would be appreciated. I've included the project folder with some flipbooks and screenshots of what I'm talking about. Thanks Heli.zip HardConstraintTest(ODForce).avi
  16. Mosaic node crashing Houdini

    Hi, I'm trying to mosaic a seires of 64 textures with 1 image per row, images are 512x1 pixel, the expected output is a 512x64 pixel texture. The problem is as soon as i join my file import node into the mosaic, I get a hard crash to desktop. This only happens with textures over 256 pixels wide. Any assistance is appreciated.
  17. Hi, I'm currently working on a project where I'm trying to bake a displacement map and normal map for a number of different waves. I have a method for baking the waves, which have been created in Maya and imported as an FBX, but want to get extra detail on the wave surface. I managed to get the ocean spectrum to use the animated wave, but the problem is that the bake needs to tile and the displacement of the ocean spectrum doesn't. I'm having trouble figuring out how, or even if its possible to create a fluid simulation that can use the wave animation. Thanks in advance.
  18. Animated Vellum constraint

    Hi everyone ! So I am working on a scene where i need to sealed vacuum a building and make the cloth breath :/ So The vacuum part work well but everytime i try to animate the constraint inside my vellum solver it's get crazy.. Does someone now how to animate constraint or if it's possible ? I'm linking the scene file untitled.hiplc sorry about the poor english not my first language... untitled.hiplc
  19. I'm in the middle of creating Whitewater particles for my waterfall sim and after caching out the particles and converting it into a volume it looks extremely low res considering there is over 300,000 particles and 8 million Voxels. Not sure what i'm missing but any help would be greatly appreciated. Thanks in advanced.
  20. Hello odforcers I'm a new user here and I would like to make couple of simple questions for advanced users, or at least I hope it's simple. So I will be investing my time into learning destruction with houdini and I know at some point I will need to do smoke simulation. Will be upgrading my pc soon. Is 64gb of ram enough to make anything decent smoke sim wise? Will I benefit having 2tb of nvme drives for caching? Will 64 gb be enough to make the sims of this scale? What is more important Frequency or Latency? Example : https://youtu.be/0d5L-AmABDU Example : https://youtu.be/qBS4bpWAY9g
  21. Hello everyone, My name is André and I’m researching how to design a 3D (environment) Production Pipeline for Virtual Reality training. The goal is to have a pipeline that would allow us to build training environments as efficiently as possible. Due to the nature of the training, our environments are relatively small max 200m x 200m. Our team is small 3-6 people but can change depending on the project. I'm especially interested in Houdini3D integration in the Pipeline for generating procedural assets. Online I've done quite some research but don't find much information about this topic in detail. Lots of examples of output but not the actual production process. I need some help with designing our pipeline. Love the GDC talk by Insomniac about procedural generation in Marvel's Spider-Man (see video below). Gives some great insights but would love to learn how to do this on a small (indie) scale. Could you share your Production Pipeline in a diagram? What do you produce with Houdini and what do you produce with other tools? Would love to learn about how you developed your pipeline and why you made certain choices.
  22. Underwater Bubble Sim

    Hey guys, so basically I'm trying to replicate an object dropping into a tank of water splash but with the bubbles/water only. The way I'm currently doing it is by emitting particles based on emission attributes defined on the surface based on it's velocity and using vdb from particles to mesh the liquid and so far it's alright. However, the client wanted a more art directable look towards the pop sim whereby more lengthy/streaky bubbles instead of huge splash etc and it got me thinking how can I achieve this? I'm on H16 and there's no pop fluid where I can easy increase the surface tension and viscosity to save my shot. Is there any pointers on hacking this shot without doing Flip? I'll upload my WIP, files and other references from client tomorrow. Thanks
  23. Hi just wondering if any one could give me any advice on how to write an expression which would set the gravity to 1 for the first 30 frames, back to 0 for until 180 where i would turn back on. At the moment i have if($FF >= 30,0,1) which sets the first 30 frames to active but I'm struggling with re-activating it at frame 180. Any help would be appreciated.
  24. Multiple Constraints on One Object

    I was wondering if anyone has had experience having multiple constraints on the same object and breaking them apart separately. the effect I'm aiming for is to have a some large rocks be ripped of a section of rubble and while in the air start to break apart into smaller pieces. I've tried setting up my constraints based on the groups created from the Voronoi fracture and sub fracture nodes, however this causes problem when trying to disable the constraints in different areas. Any ideas? ConstraintsHelp.hipnc NewRubble.abc
  25. Hi, I started to have a black screen in my render view.. then looking up into where the issue could be coming from, I found online that I tried : - restarting houdini - setting up new scenes - switching from ray tracing to PBR none of them worked, then I realized that if I start rendering, then I simultaneously try to open a new file then cancel the file opening, mantra start rendering... Anyone have a hint on what Im probably doing wrong? Thanks. Houdini FX Version 16.0.671 win10 NVIDIA GeForce GTX 9703 gb
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