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Found 368 results

  1. Houdini Instructor

    short contract (3 months) Houdini Instructor. *must have work visa or legal right to work in Italy (work visa will not be provided)* - 4-7 experience specialized in high quality FX, demonstrated through a showreel - Well versed in the operation of Houdini and can easily relay the fundamentals on how to use and create in Houdini - excellent communication skills with both students and colleagues - rounded understanding of VFX industry and VFX pipeline - pro-active learner and problem solver - strong organizational and time management skills - previous teaching experience is preferred
  2. Hi everyone, so I have been working with some renders of particles that have a material assigned to them with 0 opacity. The problem comes when I try to render out as well a Deep Camera Map and bring it to Nuke. Using the usual workflow with deep images, I am able to see the particles only when I use the DeepToPoints node in Nuke - prior to that I don't even get an Alpha nor I can see them. Is there any way I can export a map for the deep so I can make holdouts with this? Thank you!
  3. hey guys. im pretty new to houdini. im trying to move particles in space but in a grid like fashion. similar to the old windows screensaver with these pipes. right now i try to find the highest velocity vector and would like to set every vector thats lower than the highest to 0. but i cant find a solution on how to do that. help would be much appriciated. cheers, jamin
  4. Ripple effect - rebounds

    Hello I am a newbie to Houdini. I trying to replicate the section from 28 - 1:08 sec of the link below, a electron duality experiment https://www.youtube.com/watch?time_continue=6&v=JlsPC2BW_UI&feature=emb_logo I thought that the ripple solver would be the right tool for my scene and I would get a realistic a ripple sim. But that has not been the case for me ... yet as the ripple does not interact with the walls. I cannot work out how to control the ripple. I looked into ocean sim but they don't seem to be adapted to what I am looking for I am also wondering how to use the ripple info to simulate a similar particle effect that reduces to a single dot on touching the end wall. I attach what I have managed to do in the hope that someone can push me in the right direction. Thank you 200615_ELECTRON_CLOUD_01.hip
  5. Fire Sparks from Pyro Simulation

    Hi there! I'm trying to figure out how to create a POP emitter from Pyro in order to have a realistic (and procedural) Fire Sparks simulation based on heat amount. I've tried something but it's a very rudimentary solution, especially because I'd love to emit particles from top of fire (maybe when heat field falls down). How I can use a pyro field as POP emitter? And, most important, what field do I need to use? Do you have any suggestions, tips or tuts to share with me? Any help will be really appreciate! Thank you for your time. mois_fire_sparkles.hip
  6. Am trying to have some light coming out from my particles and i am using a geometry light But i can't even see the reflection on the ground, i just have a little bit on my subject. I've also tried to use a sphere and copy to points with my particles but the result is very unnoticeable. Magician_Particles_V34.hipnc Ganfaul.abc ( Geomerty in the Character Animation Node )
  7. Hi ! I'm currently working on a vellum grain simulation for snow. I need to export it to Maya for the rendering process! (our light rig and texturing is made on Maya) So my idea was to separate my meshing in two parts: • one will be particles that moved at least one time (the real "grains") aka a dense meshing to get grains almost individually • the other will be the particles that did not move/are less important aka lighter meshing to get the shape of the grains. in these way, for big scenes, I'll have a two alembic low & high, instead of one very heavy alembic file. Problem is : I can't seems to find a way to separate the two of them. I saved my simulation (cache) with P and V , and wanted to create a group that'll update at every frames to put the new points that moved in it. Unfortunately: Houdini is overreding the group, like it's creating a new one for every frame. Any idea what I can do ? Thank you so much, Marine PS : On the file I attached, the idea is to get everything around the foot shape in red
  8. Initial particles orientation

    Is there a way to randomly orient particles on each frame? If I put down Attributerandomize node before DOPnet it gives me the same exact orientation every time particles are being emitted. I don't need that, I want completely random orientation for each particle on each frame. For some reason I can randomize color inside DOPnet but not orientation. What am i doing wrong? orient_particles.hipnc
  9. Ive currently got a melting object set up controllng individual points to start melting using a popforce node. This is all working find for when I want the whole object to melt but as it currently stands as the individual points Ive selected to melt do so, the whole mesh starts to warp as if influenced by the areas which are melting. Is there anyway to tell houdini to only apply the popforce to a localised radius around the melting points?
  10. 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
  11. Good day to you Houdini magicians out there! I have been following the Particles IV Tutorial by Steven Knipping (the one with the cherry blossom petals) and as i did with the previous tutorials i always found a workaround to get it to work with Redshift... except for this one and it makes me go nuts. On the surface level everything is working as intended, except for the materials. I've tried applying the shaders on the actual instancing items, even stuff like applying the material onto the instance itself.The materials are also set up to read the Cd attributes and i checked that the Cd attribute isn't replaced or erased somewhere. Can somebody help me? Did someone out there stumble upon the same problem and found a fix. If needed i can provide the .hip file. I know it's not a too big of a problem but it's bugging me really bad. I am thankful for every bit of help!
  12. Hello, I am looking for an artist, who can build me a simple tree particle system, based on a heighfield (HF comes from LiDAR). The trees have to fade out /pop away (like dying trees) and also have to regrow (fade in /pop in, so no crazy animated needed). The system should work with Redshift proxies and scatter about 3 random trees and give me the option to change the speed of fading out/fading in. While the trees die, they have to be replaced with dead trees. If you are interested, pls send me a PM. Thank you, sant0s
  13. Hi guyz! I'm keeping studying Houdini during this long lockdown and have found my self stuck in a really tricky R&D shot. I know it's a pretty easy thing to solve and I kinda think to know the theory to do it but I just can't solve it! I have created a classic chocolate bar with caramel that get spread on it and now i'm trying to cover it all with a nice chocolate cover. I've created a geometry for the external cover and a particle fluid emitter for the chocolate that collides with that external cover. I would like the chocolate to run along the geometry and cover it all, without dripping down. I've tried with pop attraction, and pop collision detection on stick... but non of them work properly. I think I should scatter the external geometry and tell the fluid particles to get the position of the scattered particles. In that way they should stick properly. I tried in adding a sopsolver and linked my sim to my scatter points but at this point we are entering in a foggy place for me. I don't really get how can I solve this. What am I missing? (for sure a lot of VEX ) If anybody wants to help I will really appreciate
  14. Hello all, I've been trying an effect where a character runs into the water. As soon as the character starts moving and colliding with water little spheres or maybe bubbles start emitting and I don't know why. Below I have attached my hip. file and a screenshot of my exact problem. man_water_run_v11.hip
  15. GLU - music video -

    Hey, I made a few Fx on a music video for the band GLU. Had to be done in a rush, so it's far from good : / here are some fx :
  16. Wetmaps are not visible

    Hi, I am trying to get my model wet by rain. But wetmap is not visible on the object completely. It just shows up on the half body like the only half of the body is getting wet. I have attached my file Thank you rain_nine_v08.hip
  17. Hi forum! Seeking out some help here, cos I can't get my head around generating vellum geometry. I am working on a scene where I need to create close-up splashing water droplets on a static surface. Typically this would probably be a FLIP task but it seems like overkill and I am only after a couple of droplets, so the idea is to make rain and splashes with particles, copy some spheres on them and feed them to vellum to get some nice softbodies, then VDB them. My problem is I don't understand how I can "emit" on my source points that come to existence arbitrarily (ie. not on frame 1) and differentiate the newly created vellum patches. I've looked around, watched the masterclasses, I understand it has to be somehow parallel to constraint creation, maintain point count/id etc, but I cant figure out the solution. Its gonna be a single splash so continuous emission (as in a particle emitter per se) doesn't work for me. Any pointers are appreciated, check the hip for a rough sketch of the problem! Thanks in advance! od_vellum_splash.hip
  18. Hello Houdini Magicians, This little bit of code is, according to the performance monitor and some debugging, slowing down my simulation... alot. Specially with a high number of particles. The nPt comes from the nearpoint function. I analyzed the performance impact of the nearpoint function with many particles and it is not significant. Its the conditions and moving/removing particles from groups. What is the optimal way to do this?
  19. Hi there, A bit of a noob question so I apologise for that. I have a file attached with a basic particle system, connected to a copy to points, and a grid with a png image sequence as the particle geometry ( 12 frames long ). Everything is working well, except I cannot figure out how to start the image sequence on a per particle basis. All the particles start their animation on frame 10 simultaneously and new ones born after that just start with the last hold frame. I have this - " Star Sparkle_`padzero(5, clamp($F-10 ,1 , 12))`.png " in the texture field on my principled shader and this seems to give me a 10 frame offset, and it holds the first and last frame, instead of turning into a white grid, which is great. But how do I get each particles animation to start at it's birth or at an offset from it's birth time/age/frame ? I've included the required png sequence with the file. Thanks to anyone who can help me with this, it's making me feel very silly that I can't figure it out in over a week. Have a great day ! Sprite Particles.7z
  20. 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
  21. Hello good people, Let's say I have a particle simulation, I would like to store the position of every point at the starting frame and then later on, say frame 25, I'd like to reevaluate each point position. If the new number is different than that on frame one, ie the particle moved, something happens to the particle, it stops, turns green, whatever. Basically some kind of if statement, if newVal != oldVal: turn green Any help is welcome!
  22. Alembic particles to C4D

    I spent a fair bit of time trying to figure this out today so I figured I'd post a quick tutorial for posterity. The only other guides and info I could find were specific to getting pscale and Cd into C4d for Redshift. Nothing on orientation or other attributes generally. Long story short: - Unless your attribute is explicitly typed (i.e. Vector, Quaternion, Matrix instead of 3flt, 4flt, 9flt) C4d will read it as a float (or "Real") - Orientation is handled by the "Alignment" TP channel, so you need to convert your @orient to a matrix3 before export Hope this saves someone else some time.
  23. Hello; When I use scattered points as a POP source, how can I apply velocity to some group of points, dynamically ( during frames, not just at the initial frame)? I know that I should apply the velocity force inside the DOP, but I don't know how Thanks for helping. Add_Velocity_to_particles_01.hip
  24. looping particles

    I have been looping particles using CGmonkey's method: Once I raise the particles to something high(500000+) the particles start to freeze and stutter towards the middle. In theory they should all loop together, but for some reason they are not. I'm looking for a way around this or any help with looping high numbers of particles. Thanks. torus_particle_loop.hipnc
  25. Hello! I'm doing a school project, and I have to create something like a slime mesh. The main problem I have, is that I get a lot of flickering when I try to mesh the vellum grain using the particle fluid surface node. The same thing happens when I'm trying to mesh flip particles. Does anyone know how to get rid of this flickering? I've been searching a lot but can't find an answer. Thanks!! StickyFluid.mp4 bloodRND.mp4
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