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Found 222 results

  1. I was trying to expand the some smoke simulation using divergence field. the divergence field create a big hole in the smoke simulation. any idea why is this happening Test Smoke.hiplc
  2. I'm trying to make smoke emit from a sphere so that it looks circular. I have tried changing buoyancy direction to 1,0,1 but that didn't achieve the effect I wanted. Hopefully this made sense.
  3. Hi guys, I'm pretty new using Redshift as an render engine and I have a problem that I know how to solve. I've created a large column of red smoke, but when I render it always appears an annoying shiny noise. I've tried to increasing samples of all the lights to 8192, the gi sample have the same value and I've also override the volume samples to 16384. The uniform samples are: min samples 16 and max samples 128. What can I do to clean up the render? I've tried to increasing the uniform samples but doesn't seem to show any change and increase the render time a lot. I've attached and image to show you this shiny noise on the volume. Thank u in advance!
  4. solved. thx
  5. Smooth Pyro Dissolve

    This is roughly what I'm trying to create, only with a smoother transition. In the example, the smoke is being generated by an animated gradient ramp, and the opacity of the text geometry is controlled with another ramp at render time. With Houdini, I want to utilize another workflow, I'm importing the whole text in my pyro sim as a fog vdb. But I don't want the whole text to be affected at once, I want to gradually dissolve the text from left to right, similar to the shown example. 1. (How) Can I drive the 'activeness' of the pyro solver with an attribute? 2. How can I make my density text vdb as opaque, as if it would be an sdf? Thank you in advance!
  6. Hi there, So basically I have this exhaust smoke sim coming out from a flying drone. I would like the end of the smoke trail to dissolve nicely like it happens in the real world. In my sim this doesn't happen because the trail after 33 frames starts to be cut by the bounding box in a “sharp” way as you can see from the pictures. Unfortunately, I can't share the scene but let me know if you need more information. The solvers's shape settings are: dissipation 0.08, disturbance 6, shredding 0.05, sharpening 0.5, turbulence 0.15. Thanks.
  7. PYRO HELP

    Hi everyone. I've really given up and this is my last hope. I've looked everywhere for a month now and can only find basic "billowy smoke" tuts and pyro fundamental classes but my brain can't register how to make a certain look. All I want is to create this atmospheric wispy slow smoke like the example I've linked from Simon Holmedals work. My scene consists of a fragrance bottle and I want the smoke to crawl across the screen and bump against the bottle at a slow pace like simon has done in this video. SIMONS EXAMPLE MY SCENE SO FAR WITHOUT THE SMOKE All I need is a simple smoke setup like simons and I am struggling to achieve this result. Whenver I try I get clumpy results that tend to dissipate way too fast and just has a horrible movement all together. I'll also attach my .HIP file for anyone who wants to take a further look at my sim setup so far. I feel like I am not utilising the tool correctly and would love ANY input LINK TO .HIP FILE Thankyou.
  8. Smoke houdini

    Smoke rbd houdini + hip file In this asset, the dynamics of the interaction of solid objects with volimetry as well as the dynamics of the destruction of the object are added. https://artstn.co/m/JnJq hip file Cloud and fire houdini + hip file This project presents the procedural modeling of stones, creating a lightning strike, working with sand, clouds, and fire. The final animation can be viewed at the link below or in my portfolio. https://artstn.co/m/Bq6a hip file Lava smoke houdini + hip file This asset presents the dimanics of hot lava smoke, the dynamics of the lava itself, and the shaders of smoke and lava The final animation render can be viewed at the link below or in my portfolio https://artstn.co/m/pJaG hip file Ice smoke houdini + hip file In this asset, not only work on creating cold smoke is presented, but also work with sand and its dynamics, particle emitter, procedural modeling of crystals and stones, as well as a full render of a scene with shaders. The animation that happened in this can be seen on the link below. https://artstn.co/m/d0Ak hip file
  9. Smoke houdini

    At the top of the link above are different smoke dynamics. Work with fire and much more
  10. Hello everyone, I have been attempting to figure out this problem on my own, however I have spent far too much time on it and would love some help if I could get it. It would be very much appreciated. I am attempting to create the effect seen in my first image, the very odd colored smoke. The second gif is what I currently have, which I would say is a good 70% of the final look for about the first third of the chunk of smoke. I need to create the next chunk of the effect, which is the larger more diffused, bigger turbulent smoke. I have been attempting various methods to achieve this. I have tried to use control fields on the current simulation. I don't think this is the best way because my GPU runs out of VRAM, and also I have less control than if I were to break it into multiple sims. I also tried copying the first VDB, clipping, transforming to the XMAX of the first VDB (where the next part of smoke should start), scaling, and retiming, which sort of worked from certain angles (not my camera) and I felt it was sloppy. So now I am wondering, what would be the best method to break this into 3 simulations? First part is fine, the tight, high frequency turbulence that I am happy with (happy to fine tune it later). Now second, the middle chunk of the bigger poofier part, and then finally the tail end. Maybe this could be done in 2 simulations. Maybe I would need 3. Would I want to source in from the same direction the first simulation is flowing outwards? I am not sure how to proceed efficiently and would really love some help! Thanks!
  11. 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.
  12. Hi; In a smoke simulation (H18), the velocity seems the same in all areas, but I want the smoke to slow down after a while. Something like air resistance. How can I change the velocity over time? Thanks.
  13. pyro smoke issue

    hi I have a problem with smoke upres sim. it's normal when I cache lowres. but when I use upres to sim. the result is weird. the smoke has been cut into quarter after few frames. don't know if anyone has the same experience. I tried to solve it with change my bounding parameter setting. but nothing going good..... ( maybe the problem not from bounding box, because the bounding range in normal in the viewport. not sure....) the video and pics attached. issue_1.mov
  14. Smoke from scratch, add force

    Hey dudes, I'm trying to build a simple smoke solver from scratch to understand more how they work. I created a simple setup with density, temperature and buoyancy. Now I want to add a second velocity volume as a force to my simulation. But when I add the force, the velocity is increasing massively in a few frames. I have to mix my force with the existing velocity but I don't understand how to do this my_solver.hiplc
  15. 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
  16. 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
  17. 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
  18. Vellum and Pyro - Two way Interaction

    Any ideas on how to make the smoke influence the cloth sphere while the sphere influence the smoke? Scene file is attached. Thx Any RnD_0100.hip
  19. Explosion timing methods?

    Hi all, Going to get straight to my point here. I've been trying to wrap my head around a proper workflow for achieving good timings explosion and smoke simulations. Let's say in this example explosion , the look and the timings are great. My ideas are either having proper advection methods, using animated divergence, injecting high velocities for first few frames and then using drag to slow it down or (last idea I had today) using Time Warp node, to retime the whole explosion caches to your preferred look. Could someone experienced enough drop a few lines around what the approach of an FX artist is whilst tackling a explosion in a shot for a film or just in general. Am I going down the right path with these methods or is it completely off? Thanks
  20. Hi; I would like to render smoke with motion blur, so I turned on "Geometry Motion Blur" option on "pyro_import" geometry, but it doesn't work. Any idea? Thanks.
  21. Pyro I - Smoke & Steam

    Check out the course at: https://www.cgforge.com/course?courseid=pyro-i Thanks for watching!
  22. Hi everyone, I've run into an issue and I'm looking for some help coming up with a work around. We've got a lot of effects that involve smoke trails from characters flying around and we've been using pyro clustering to make the trails. However there is one particular issue I just can't think of a solution to. The default cluster setup transfers the cluster number to a trailed collection of your source points and then finds the lowest source frame in each cluster in order to determine which frame each cluster container should be created on. This works fine normally, however if your trail loops back on itself or comes too close to where it was in world space at another point in the shot then the cluster gets confused as to which container should be used resulting in gaps in your trail. I've been trying to come up with a way to fix this procedurally but keep hitting dead ends. has anyone run into this issue before? Short of trying to convince animators to never have the characters loop back like this does anyone have any ideas on how to circumvent this problem? Thanks in advance, -Brandon
  23. is SDF and VDB are same...? if not what is the difference between them?
  24. Render Smoke Question

    This might be a strange question. I have been learning about rendering the smoke. I went through some basic tutorials to get a final render in mantra. The main one I followed was about transferring the attributes from the viewport shader settings to a mantra shader. I managed to get a good result in one file as far as a good opacity and subtlety. The problem is that if I try to recreate the look in another file I can't find the key attribute or setting I tweaked. Here is the file I had luck with. Maybe someone with a little more experience might be able to help? Thanks, renderBase.hip
  25. 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
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