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Found 147 results

  1. When I do some simulations like pics at bottom, Scene view become crazy like those .. I imported alembic files and set their position. but If I do simulations with dopnet, They are gone to randomly strange position like secone pic, and going to be black like first pic. When I delete scene view and make it new, It looks like when I set up. But I have to see that simulations preview and these problems make me crazy :S Help me with this plz !! Sorry for my poor English and thanks for read Have a good day
  2. Hello, I am currently doing some RnD on a rocket engine. For this to work properly, I need a way for my emitter geo to shoot flames with initial velocity in the normal direction of the emitter. I made a gif to show the problem. Red is the emitter, the arrow represents the direction of the initial velocity. Right now, my simulation only shoots flames with an initial velocity in one specified direction. I used the "add initial velocity" in the create volume source node of the emitter. But I don't really know how to animate that. Appreciate any help, thanks!
  3. Hi first, I'm beginner of Houdini and I'm just challenging to control pyro without shelf tool (I mean, pile nodes up from bottom) But, Even I use shelf tool, It is still hard to deal with flame height, amount of smoke and etc .. First of all, I wanna make fire of match and that flame height makes me to be confused .... I controlled options at combustion and simulation tab at Pyro solver but I can't understand it yet ;;; How could I deal with this ?? Sorry for my poor English and thank you for read ! Have a good day
  4. Link to tutoial -> https://gum.co/imSYS In this comprehensive stand alone tutorial we will go over how to set up scene-scale clustered pyro simulations and blend them together post-simulation to make it appear as if it is one large simulation. This process will lower simulation time, allow for higher resolutions, and be more efficient when saving to disk because there are fewer voxels. This process will also optimize large scale pyro scenes, so that simulations are only calculated where absolutely necessary and blend them together so that it appears as if it is the same volume. This tutorial comes with all digital assets, a documented and fully set up file as well as a starter file for following the tutorials along the same as I work through them. An intermediate tutorial for those looking to speed up their pyro workflow, learn some VEX and create massive sims. Includes a documented scene file and all digital assets! Hope to see everyone leveraging these optimizations in the future to create massive simulations and squeeze in those extra few iterations before deadlines! You can reach me at trzankofx@gmail.com for questions or comments.
  5. Offset Mesh

    HI Does anyone know how to make an offset mesh, to create thickness?? Also, does anyone know how to make the exterior surface of my mesh like the image? I have uploaded my hip file. scene3.hipnc
  6. Ripple Fade

    Hello, I have a ripple sim created with a sphere moving through a grid and the points deforming based on the velocity transferred to said grid. What I am trying to do is isolate the geometry based on where there are ripples via colour then as the rippled geo begins to settle back into what it was originally have that colour fade back to black. I'm halfway there I think. I was able to isolate the rippling parts of my grid by using a facet to compute its normals and then a point SOP to add colour based on the normal in it's Y (@N.y < 1). I was thinking of trying to use a vop or another point sop to make it so when the normal is between x and y multiply the color by 0.95 to get it to fade over time but was wondering what other ways I could try to do this. Cheers, JP ripple_example_1.hipnc
  7. Hello, i am currently working on my final student projet where i make a plane crash with Houdini. I base the workflow of this project around the RIGIDS III tutorial by Steven Knipping. Everything is working fine until i bring in a simple glue constraint, and when the simulation gets activated at a said frame the simulation simply does not happen. It works when i disconnect/disable the constraint. I already tried to unpack the alembics upon importation with the alembic node but that didnt change anything. What is weird is that everything was working fine when i used the model given with the course. I haven't really found anything that helped me online, so hopefully one of you can help me with this issue, i would appreciate it A LOT. I will attach the files down below. Thank you ! plane_sim.rar
  8. [New User] Wood Splinter Problem

    Hello, I'm new to Houdini and 3D in general. I'm trying to make some demo reel pieces and I've decided my first project would be to split some wood! I used Boolean fracturing technique to cut a box into splinters, and then assembled them into Packed Geometry. Then I did dual constraint set-up taught by Steven Knipping, where I have an inside glue (STRONG) and an outside glue (WEAK). I then brought everything into the DOP network to simulate. But as you can see from the video I've attached things are not going well. The initial hit is doing alright, but once the big piece lands on the ground (when it should be resting), it bursts on its own without further influence. I'm guessing the forces there are exceeding the inside glue and causing the pieces to propel outwards pushing others with them. Anyways, really would love some feedback on this first test and perhaps some solutions on how to fix the issue I'm encountering. I've attached the HIP file as well, if you can also point out the things I am doing wrong and how to improve the setup, that'd be greatly appreciated! Toothpaste, Brush everyday. plank.hipnc - 362.7KB woodSplinter.mov - 1.8MB
  9. Looking for opportunities in Los Angeles, in-house or remote. My email: aximixa1@gmail.com Phone number: 310-425-6812
  10. Hi all I am trying to simulate rain splashing on an already full tea cup, like the reference below. I have done a FLIP simulation which fills up the teacup quickly using an emitter inside the teacup, i have also done a basic rain simulation using the POP solver. BUT. i cant get the two to interact, the rain needs to be splashing the water as it hits it but i have been struggling for a few days and just cant seem to get it to work. I'm guessing its because i have used a FLIP solver for one and a POP solver for the other, but i have tried making them both FLIP or both POP but i just cant seem to get it to work with either. I don't know a huge amount about particle simulations so i might be being really dumb here but can anyone give me any advice or spot anywhere where i have gone wrong? I've attached the scene file and the geometry .obj that needs reading in, along with some screenshots of my nodes. Any advice would be amazing! Thank you in advance! rain_issues.hipnc teaCupV3.obj
  11. Apple Decomposition

    Hey! This is my first post on here. I've been working on this apple decomposition shot. This is where it's at now, but I'm going to be taking another stab at getting it to a higher level of realism. Any feedback on how to approach it better/critiques on whats standing out are appreciated! Thanks!
  12. Random shooting box

    Hi guys , I'm totally beginner of houdini and I'm stucked with some problems. I set up boxes randomly in scenes, and want them to shoot at same direction. I mean, some box goes to X-axis at 3 sec, and some start to go at 6 sec like that. Here is example, I want to shoot boxes randomly to blue arrow direction. But I don't know How do I deal with Id(?) or that boxes point numbers T_T Please help me !
  13. Hey Everyone! So the issue is... I am using Voronoi to fracture an object. The inside and outside faces are in two groups named 'inside' and 'outside'. I'm using the 'assemble' node to pack the primitives however, doing this, it looses the 'inside' and 'outside' groups which I need to use later on. Is there a way to use the assemble node and keep the groups? Any advice is massively appreciated! Thanks All!
  14. Hi! Houdini beginner here, I am trying to make a basic rain sim of rain interacting with an object and splashing on the ground making puddles. I am having a problem with the particles splashing on the ground, they are acknowledging that the ground is there but 50% of the particles splash against it but the rest go through it and splash just under it, i have tried using different things for the ground like a groundplane and geo but i keep getting the same problem. Any suggestions or help would be amazing! I Have attached the scene file if anyone would be amazing enough to have a quick look? Thank you in advance! Rain_001.hipnc
  15. Hi all. I'm making a lightning FX generated by a sphere. My problem is that i would move a sphere but, if i try, the generated lightnings do not follow the sphere. They are created in the sphere current position, but after they don't move following the sphere. I suppose it is the fault of the solver node that control lightning life, but i don't know how to do. I'm following This tutorial (http://lesterbanks.com/2016/12/build-custom-lightning-solver-houdini/) to learn, but he does not want to move the object, so for him is not a problem.
  16. Hi guys, I made several text by font node and I want to pop out them randomly. I thought about that make some variable to each of them like 1,2,3 and rondomly selecting in wrangle node. but I have really poor logical thinking and It is taking lots of time. Help me with it plz ! Have a good day and sorry for my poor english too :S
  17. I need some help with making this corals and animation. I wanna make that corals to be shaked when I blow wind. If I already have those corals modeling, Do I have to make it to cloth objects ? I really have no idea with this T_T I'm just beginner If you have any good Idea about it, please let me know ! and about making procedure corals too Thank you for reads
  18. Hi all, i hope you are wall well. I have a quick question regarding exporting of transform data from my rbd object. I need to use the transforms in Maya. So i have tried to export the rbd as an fbx, however i still do not get the individual transforms for each peace in my rbd sim. So as an example imagine a sphere attached with cubes. I would want to export the cubes and each other their transforms from Houdini to Maya. any one have any solutions? Thank you
  19. Intersecting geometry fix

    Hi guys, I hope you are all well. Okay, I have this issue for this personal project I am doing for a friend's short film. Basically, we have a rigged animated model of a man walking. I need to attach these cubes to the body (all over the body that is) completely covering his body with cubes. I then need the cubes to be colliding with each (basically to have no intersections between the cubes). Can someone please give me some advice as to how I will stop the intersecting geometry. I have scattered points on the animation, copy to points the cubes and have run a rbd solver to solve the penetration but I still do get some intersecting. I am sure there is another way for this. Thank you all soo much. Merry Christmas
  20. Hi Could you explain me how can I make this scene at 02:50 in this video ?? If you let me know tutorial about this, It'll be big pleasure to me Thank you , and have a good day !
  21. Hi Everyone, I am still new to houdini and I frequently run into the following problem. WhenI use VDB volume for collisions in houdini Particle or Flip sim, particles collide with the bound of VDB volume instead of actual VDB shape. It kind of creates a boundary around VDB and uses that boundary for collision. Its visible in the viewport in orange color (yellow color in the provided SS as d object was selected when took SS). I often get this issue and I dont know what I am doing wrong and how to solve it. Even If I use shelf tool the problem still persists. If anyone of you have ran into this problem then please let me know how u solved it. thank you for your time. Cheers!!!
  22. Cracked Ground Geometry

    Hi, I am working on a collapsing ground scene. On a hillside geometry I create curves for shattering the geometry into organically cracked pieces. It's working. But when I shatter these pieces again the boolean operator causes a trouble. It says 'Nonmanifold edges in solid'. What I tried: polydoctor sop to check the wrong geometry and repair it. It does not solves the problem. What was working, but maybe not an optimal sollution to convert the shattered geo to vdb and back to poly and shatter then. But it looses it's details in geo. My question: 1. Is there a way to prepare the geo to avoid nonmanifold error. 2. In a loop of more cracked pieces how can I check the boolean result error to make a correction. Thanks in advance!
  23. Explosion with PyroFX Series 2

    New tutorial available at cgcircuit. Creating explosion https://www.cgcircuit.com/tutorial/explosion-with-pyrofx-series-2
  24. FX TD/Artist Diego Grimaldi Looking for work

    Hey all, I am an FX TD and artist currently looking for work in Canada, Europe or remotely. Email me at: grimaldi.diego@gmail.com This is my latest reel
  25. Deform Groom curve stretching

    Hi Odforcers, Im working on a project where I have to tear up a lawn using bullet rbd's and hair to generate grass. Ive come into a problem, or maybe a bug where the grass in the deforming rbd patches becomes very long either when moving through space, or even at rest. I cant seem to find any other topic where this has happened before. Has anybody encountered this kind of problem with H16's hair and deform groom? Any incite would be appreciated. Id love to attach a screen shot however the content is under NDA. All I can say is imagine a bunch of curves spidering out from underneath a few selected skin patches. Cheers!
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