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Found 135 results

  1. Hi Everyone, Wanted to share a little person project I'm working on. Nothing too special but its got some neat ideas in it. The idea is to have a bunch of cubes sitting on the ground that will spontaneously "erupt" into a few more cubes. (Now that I think about it its a similar idea to the multiplying treasure in Harry Potter). I've got a crude but effective setup going. I think its got the basics in place and it seems to be somewhat stable. I didn't like how bland the actual "eruption" was looking so I've been working on a way to add some flair to it. At the moment I've got a simple hand-made animation done using two transform nodes. I then take each of the cubes, transform them into a specific place and orientation, run them through the transform nodes with a delay to get the animation, then transform them back to the original position. The transformation is mostly done through VEX. Transforming the pack prims in the right way turned out to be much more involved than I expected but now that its all actually done its not too difficult. The above animation is not integrated with the bullet sim. Its just a proof of concept to make sure that I can actually instance an animation to the cubes while taking into account their various orientations. The next step is to get the hand-made animation working within the DOPs sim, which I don't actually think will be as bad as I initially thought. Though time shall tell. The scene is a mess at the moment so I'll clean it up and post it along with some more detailed notes at a later date for those that are interested
  2. Bone border problem

    Hello Houdini masters! Can I ask You, I cannot find any tutorial where is explained this problem: I creaded animation of lets say snake (pipe), but I have problem on edges of animating bones, because it creates me the deformations. Is there any operation, which will make gradient more smoother on those edges. Basically something what will make those connections sofness, or smoother? I hope its understandable, from my question, maybe try to check uploaded file. Thanks for your help cheers! problem.hip
  3. For the folks out there looking for a way to do motion retargeting inside houdini, here´s a tease for a tool that has being working for 2 years now! In a couple of weeks I will share more info about how it works, since I don´t have plans to release it, but I will help anyone who wants to do the same - the tool doesn´t have fancy a algorithm, but works very well. https://vimeo.com/299246872
  4. Have built a decent rig for a Bat Model but cannot figure out how to adjust the capture weights once the Mesh is captured onto the Bone Hierarchy. Whenever I select the “Edit Capture Weights” tool it keeps saying I have no selected Captured Geometry, but I do have my mesh selected. I just want to adjust the Weights of my rig to get a better animation result. Help Greatly Appreciated! Bat-1.hiplc
  5. Animated Mesh on Vellum

    Hey guys, is ti possible to put an animated mesh, with changing point count, on Vellum? This is what I need to simulate: Scene file is attached RnD_Embroidering_v202_odforce.hip
  6. Hi, I am currently creating a simulation with flip fluids that are affected by a vortex force. I need the velocity/lift attributes to be animated independently throughout the simulation, though no matter how I set the settings for either the sop geometry, or vortex force operator, the values will not change throughout the simulation. What is the proper method for animating these attributes for use in dops? Thank you,
  7. Hi, It seems that generally when animating objects in scene/object level, you are only able to animate variables globally. I have a scene with a spinning propeller, and this spinning propeller needs to rotate around its own axis, while being placed in a certain spot in the scene. How is this achieved? All transforms in the scene are global space, so if you need to rotate the object 30 degrees on the X axis, the Y axis will not follow the local transforms and the propeller will spin sideways in circles. Followup question: I briefly had a teacher from Lost Boys school of VFX and he showed me how to properly load animation data into a dopnet. Unfortunately I was just starting out with Houdini as he showed me, so I did not catch the method. I gathered that this should not be done in sop-level ('Use deforming geometry'), and rather with motion / 'RBD keyframe active' operators in the dopnet -- how do I load in my animation data, so the velocities are correct with proper interpolation? Thank you,
  8. Hey everyone, I'm happy to introduce Bullet Breaker Core, a toolkit for easy animation of bullet simulations. Link to Bullet Breaker toolkit -> gum.co/hTnq The purpose of Bullet Breaker is to allow for easy animation control of fracturing objects inside of Bullet simulations in Houdini. Bullet Breaker Core comes with digital assets to allow for ease of use in setting up and visualizing Bullet Breaker attributes. Bullet Breaker Core also comes with a brief tutorial which goes over how to setup bullet breaker compatible fracture geometries. Bullet Breaker Core does not use Houdini constraints and while it is possible to use Bullet Breaker with Houdini Constraints it is not meant to be used with Houdini constraints. Includes the demo scene file and all digital assets! Hope people find this toolkit useful! You can reach me at trzankofx@gmail.com for questions or comments.
  9. Finally finished this example that's been sitting on my backburner. It's a really simple demonstration of how you can use the Pose Tool and Pose Scopes to get invisible rigs and motion paths in Houdini. Has anyone used them in production, by chance? What's been your experience? Caveat: that hip file is definitely NOT an example of good rigging practice, by any means! Industrial Robot Arm by UX3D on Sketchfab (CC BY-NC 4.0) invisible_rigs_motion_paths.hipnc
  10. I have a lattice deforming an object. I want to animate the lattice points, but I can't figure out how to animate the lattice points themselves and not the lattice as a whole. How do I animate/set keyframes on the individual points? Thanks
  11. Hey guys, i have an alembic animated file (there's no deformation) and I have to convert this object to a vdb mesh (vdb from polygons >> convert vdb). I did it on a static frame (using timeshift) and now i'd like to copy the original animation to this new mesh. A copystamp does copy the position but not the rotation. Can you guys help me with this? Just to make things clearer (this is not the original scene, i'm kinda faking it so i can share here) this is the alembic character animated: then I made this new mesh from it: i need to transfer the position and orientation from the first one to the second one. I guess i could make it with a packed object since it have just one point Thx! RnD_copy.tansformation.v1.01.hiplc
  12. guided ocean from animated geometry

    Hello this question was originally asked here (and I have pretty much the same question) https://www.sidefx.com/forum/topic/46028/ "I am wondering if it's possible to simulate a thin layer of ocean from any given geometry mesh in houdini?" Or from my input mesh that is a deforming animated plane? It is basically wave previs anim from Maya -- I am looking to drive a flip sim with this animation similarly to bifrost guided parameters: In the sidefx forum I linked someone mentioned "- detect position of flip particle if it is below or above the surface if below the surface but the distance with the surface is below a certain threshold advect it by the point velocity. if the distance is more than the treshold it get deleted every frame." I was wondering if someone can headstart me with how to go about this implementation, does this process need to be done within the solver? Thank you all for your time! -Shane
  13. I have a Digital Asset of my character. It is animated in the animation scene. Is it possible to transfer animation to another scene with the same asset with standard Houdini tools?
  14. Animated Impostors

    Hey All, I've been trying to work out a simple pipeline to generate a crowd from impostors for use in Unreal 4 using models from Fuse with animations from Mixamo. Creating characters in Fuse is extremely fast and simple, and the one-click option to send it to mixamo to rig it and load in animations opens up a lot of potential for easy crowd generation. However, with a lot of projects shifting towards VR / AR these days we need more and more efficient crowds. The impostor workflow offers a great solution for that, and the GameDev Impostor Camera Rig + GameDev Impostor Texture ROP really set it up to be really nice and easy to generate the output - but I'm running into some issues and could use some outside opinions. For reference, I'm following Mike Lyndon's documentation here: https://www.sidefx.com/tutorials/generating-impostor-textures/ So far, the following steps are working out pretty well - 1) Create Character in Fuse 2) Rig and Animate Fuse Character with Mixamo 3) Import FBX to Houdini 4) Extract FBX Geo to new Geo node 5) Create new Mat inside new Geo node, remap existing materials 6) Create GameDev Impostor Camera Rig at obj level 7) Create ROP Network, create GameDev Impostor Texture inside ROP network 8) Direct Camera Rig towards Impostor Texture, Direct Impostor Texture towards Camera Rig 9) Set Impostor Texture to 'Animation' mode and render out to $HIP/TEST/${OS}_${WEDGE}.$F4.png (or appropriate directory / filetype, this is for testing purposes) The problem I run into is at render time; the ROP is intended (afaik) to render out the frames of animation, rotate the camera, and then render out the frames of animation again from the new angle. It does exactly this, but overwrites the first frames of the animation each time the camera rotates. I thought the _${WEDGE} portion of the file naming would handle this but it doesn't seem to be appended to my filenames. Right now I'm getting "rop_impostor_texture1.0006.png" where 'rop_impostor_texture1' is the name of my impostor texture and '0006' is the frame. Any thoughts as to why this might be happening or possible solutions would be appreciated. Please let me know if any specific screenshots would help (ie. the ROP, Camera Rig, etc). UPDATE 001) **NOTE: This only applies to non-production build 1.20; the naming is set up properly in production build 1.12** Solved the naming / output issue, it turns out the GameDev_Impostor_Texture rop was looking for the wrong output picture parm. This is the field that needs to be re-directed for the output to work as expected: Also worth noting is that if you assemble the sprite sheet expecting the Unreal shader template to work, be sure to have the animation frames in the Y axis and and camera rotation in the X axis. The next major hurdle for me is to try to reduce the camera rotation range to 180 degrees, since I don't need the back views of my crowd characters, and to limit the animation frames... which I'm more concerned about at the moment. I need to retarget a 64 frame animation down to ~16 frames or less. The fewer I can get it down to, the potentially higher resolution I can let the individual sprites be. More updates to come.
  15. Hello all, Getting to it I have a camera in Maya with camera shake enabled. I know baking can only work if the Horizontal Shake and Vertical shake options have been moved from the background to the channel box with the Channel Control in the shape node of the camera. Once it's baked I export it as .fbx into Houdini(16.5 if it matters). But the camera shake still doesn't show up in Houdini. Also of note, I looked through the camera settings in Houdini and I don't find anything similar to a camera shake option in there, so maybe because there isn't a setting it won't use that baked information but I am truly stuck. For fun I attached the camera, don't know if it's useful but its there. TL;DR = Camera shake from Maya camera doesn't import into Houdini, what do? Thanks. Edit for all the people out there. The solution is to just not use .fbx. Just use alembic guys, it works. Hopefully somebody else in the future will be able to use this advice so they didn't have to be me scrolling around google for two hours. CameraExport_01.fbx
  16. Hello everyone! Even though I've had many help on odforce it's my first time posting. As the title says I'm trying to figure out how you would use particle velocity to increase and decrease the speed of a looping animation. I have done it with a copy stamp but I was wondering if there is any other way around it. Thank you in advance
  17. Hi guys! I am working on a project that needs a spirit moving through a scene, it needs to be like flowing smoke with a glowing light effect so that if reflects on objects in the scene. I cant work out how to emit light from the smoke and move with the animation, i have been playing with both volume lights and geometry lights but i cant get either to move with the animation, they both stay at where the animation is on frame 1. I have tried selecting the volume and creating a volume light from that, and also using the original animated geometry before it was turned into a volume and making a geometry light from that, but neither use the animation. Can anyone suggest what i am missing or doing wrong? Or way to get the smoke to emit light and use the animation to move? I have attached a r&d scene file and a play-blast of my problem as it stands at the moment, any help would be really appreciated! smokeLight_001.hipnc smokeLight.mp4 smokeLight_001.hipnc
  18. Hey all, I am quite new to Houdini and am wrestling with an issue. I have used table import to add a list of values to a set of primitive's attributes. The attributes of the primitives is then set to change to the next columns value in the list every ten frames. I then poly extrude by this value. Therefor each primitive extrudes by the value it has been individually given which changes every ten frames. This however means that the animation is not smooth and jumps every ten frames. The best way I thought to smooth this was to find the sum of the current frame and following 9 frames and then dividing this value by ten. Therefore finding the average value over the ten frames and smoothing the transition between values. Is it possible to write such an expression? If so how would it look? Cheers
  19. Hey Came to London to work for Crowd at MPC. Here's a summary of the challenges I responded to in Houdini: At the moment, I'm looking for the next thing to hop on. Most jobs for Houdini are VFX centric and I'm mostly a generalist leaning more towards geometry, rigging and motion processing side of things. Here's some public Orbolt Assets: https://orbolt.com/search/?q=probiner Building one right now to upload, to alike the matrix one, visualize arrays of vectors: https://i.imgur.com/ZPki1XN.png Let me know if there's something fit mid-term going be it for Houdini or XSI or even just if you're around and want to have a chat! Thanks
  20. Hello, today I am facing very difficult problem, maybe you could help me in this struggle. Scenario looks like this: I received animated tree exported from SpeedTree as an alembic file. Now in Houdini it looks like wind is moving leaves which is perfect. The problem is I would like to collide with the leaves with RBD objects which are bouncing around my scene. I would like to keep my “wind” animation on a tree but make the tree responsive to any objects that may collide with it and make it so the leaves would bend on collision. Is it possible ? If so what would be the way to achieve such effect. Have a nice day and thank you for your input in advance. P.
  21. Some Looping RND Animations

    I'm not working in a studio setting anymore, so I've been doing random little houdini experiments to challenge myself, and keep learning new techniques. It's been a lot of fun. https://www.instagram.com/rycofx/ Hey does anyone know a better way to present these than instagram, or have a suggestion for a good GIF converter for linux?
  22. Houdini Lighting Artist - Interference Pattern

    Houdini Lighting Artist Interference Pattern are recruiting for a full-time Houdini Lighting Artist. The Role We are looking for a Houdini Artist to take a lead lighting role on projects. An ideal candidate would also be skilled in Nuke (or similar compositing package). The Role requires a broad knowledge and experience of the entire 3D Pipeline, with a focus on producing polished lit shots. We appreciate that potential candidates may have varying levels of experience; we are primarily looking a proven track record in turning out great looking work using Houdini and a candidate who can demonstrate a strong sense of visual aesthetics. Responsibilities Responsible for final Houdini 3D scene assembly and output, including Digital Asset creation, setting up lighting and rendering final outputs. Working closely with a project’s creative team, directors and clients to define the best approach and execution for projects. Optimize and troubleshoot lighting and rendering problems. Additionally candidates may be asked to work on compositing final shots dependant on experience. Shading/texturing work as and when required. Requirements Demonstrated knowledge and experience of Houdini within a production environment. Strong understanding of multi pass 3D rendering and compositing. Strong understanding of lighting/shading/texturing principles and techniques. Knowledge of rendering techniques and optimization processes to minimise render times. Ability to work within a style established by the Client / Creative lead. Experience with Nuke or similar compositing package (eg Fusion). Programming or scripting skills would be beneficial, but not essential. Ability to problem solve and predict potential problems. Strong communication skills are critical. Artist must be able to work within a team, taking direction and exercising attention to detail. Solid work ethic and a positive attitude in the face of challenges Strong time management skills and organization. Minimum of 3 years production experience and a degree qualification required. If candidates do not possess a degree, 5 years production experience required. Degree and work experience requirements may be waived if candidates can show exceptional skills. Currently be able to work in the UK. Able to be located on-site in Edinburgh About us We are a small and perfectly formed animation studio based in Edinburgh, one of the most beautiful cities in the UK. We do a diverse and interesting range of work, including documentary features, commercials and original shorts. Application process To apply, please send us your CV, cover letter and links to an online showreel or portfolio to info@interferencepattern.com Job Type: Full-time
  23. Senior 3D Artist - Interference Pattern

    Do you want to come and work at a vibrant and passionate animation studio, based in the beautiful city of Edinburgh? If the answer is yes, then check out our current job opening below. …about Interference Pattern We are a small and perfectly formed animation studio based in Edinburgh with a diverse and interesting range of projects in the pipeline, from documentary features to original shorts, working in 2d, 3d and vfx. …about Edinburgh Edinburgh is the beautiful, historic and vibrant capital city of Scotland. With a blossoming creative arts scene and great access to the rest of Scotland it offers the best of both city living and the great outdoors. Senior 3D Artist We are recruiting for a senior level 3D artist for a full-time position at the studio. Ideally the candidate should have a minimum of 4 years production experience, with some of that time spent in a more senior artist role. This timescale is negotiable depending on an applicant’s portfolio. A generalist 3d skill-set is required, with strong lighting and compositing also being an advantage. The role will entail most aspects of 3d production, with a focus on modelling, texturing, lighting and compositing, with rigging and animation, if covered within the candidates range of skills. If you have a more technical mindset then there is also scope for contributing to the development of our studio pipeline and procedures. Start date is negotiable depending on the right candidate for the position, but we are aiming for immediately. If you relish the prospect of working in a dynamic, growing animation studio this could be the perfect position for you. Responsibilities working on all aspects of 3d content for studio projects from modelling to lighting and compositing working closely with a project’s creative team, directors and clients to define the best approach and execution for projects Requirements Artistic Requirements a generalist 3d skill-set strong lighting and compositing a bonus portfolio showing both photo-realistic and stylized 3d examples an attention to detail and ability to self-critique Personal Requirements minimum of 4 years production experience excellent problem solving skills an ability to guide and direct junior members of the team a strong track record in successfully delivering projects within deadlines, whilst meeting the required quality and creative criteria currently be able to work in the UK. able to be located on-site in Edinburgh Technical Requirements (bonus) familiarity with the following software would be a bonus (but not essential) Substance (Painter & designer), Photoshop Houdini, Maya, Zbrush Nuke scripting and coding skills a bonus Application process To apply, please send your CV, cover letter and links to an online showreel or portfolio to info@interferencepattern.com
  24. Hi guys, I'm having some trouble using bone length for squash and stretch as its giving me crazy deformations that I cant fix. (see attached file) if anyone knows how I can solve this, it would be much appreciated. Also, the other problem is, how would I implement volume preservation with the squashing and stretching? In maya, we would use the joint scale but Houdini seems to give weird results if I scale bones. Any help is much appreciated. Thanks. rigging_bone_stretchy_problem_01.hip
  25. Hi guys, I'm having some trouble using bone length for squash and stretch as its giving me crazy deformations that I cant fix. (see attached file) if anyone knows how I can solve this, it would be much appreciated. Also, the other problem is, how would I implement volume preservation with the squashing and stretching? In maya, we would use the joint scale but Houdini seems to give weird results if I scale bones. Any help is much appreciated. Thanks. rigging_bone_stretchy_problem_01.hip
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