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Found 107 results

  1. Hi. What is the best collision method of POP simulation for debris in large scale destruction simulations? I think that such scenes in RBD are optimized by convex collision and packed geometry, so its computational cost is few. However, with POPSolver, we need to use Volume or Surface Collision (I thought ConvexCollision would work a while ago ...), so the computational cost will be quite high depending on the size of the scene. Is there an optimal workflow for generating a Pop simulation with PackedRBD simulation and accurate collision? Or is this something that you have to pay a reasonable cost for collision like VolumeSimulation?
  2. 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
  3. Hi.I have been looking for a good edge detail way for Houdini destruction vfx. For Destruction, pieces are created by Voronoi split, but the straight cutting line is not good looking. EdgeDetail of RBDmaterialFracture node solves this, but it is very unstable for small or complicated geometry. Boolean-based segmentation (cutting) method is also less stable. so I want to distort the edges formed by Voronoi segmentation.And I don't want to use the shader-based method too much. The only way I found was https://vimeo.com/178206035, which is fast and stable, but for most geometries it forms strange polygons that don't fill tightly and can't keep the original geometry looking. This can be solved by the trick of TransformPieces only when the Lowres fragment moves by Sim, but the whole topology changes drastically, so it becomes very heavy if transferred to other software through Alembic etc. Motion blur is also difficult (especially not compatible with c4d) The problem of UV distortion is also serious. See the file for details of the problem. Does anyone know Edgedetail's method for a good Voronoi split that fills the gap exactly? edgedetail.hiplc
  4. texturing destruction

    I'd like to know if there is a way (a proper workflow) to add textures to a destruction simulation ? thanks destrcution.hipnc
  5. Hello everyone, Recently I tried to create a completely procedural building, which at the same time is ready to be destroyed with Houdini and this is what I ended up with. https://vimeo.com/355676432
  6. Hello Everyone, I have just create tutorial of making nuclear cooling tower destruction using new features of constraint in Houdini 17.5 Check in here: https://www.cgcircuit.com/course/nuclear-cooling-tower-destruction Best Regards, NhanVo
  7. Chimney Destruction - Constraints Problem

    Hi guys, I have a problem, with constraints. I create a simple scene and get a desirable effect. It is a simple setup with a combination of strong glue constraint and soft constraint, which is fine. But this setup doesn't work as I want in chimney setup, so I have to change the setup to two glue constraints, stronger and weaker. I tried to convert weaker glue to soft when chimney falls down, and get effect like in simple scene example. This conversion I tried to accomplish in SOP solver in the constraint network. if(@Frame>115 && s@constraint_name=="Glue2"){ s@constraint_name="Soft"; if (f@distance > 1 ){ i@group_broken=1; } } This complete mess my constraints both strong and week. So any advice to accomplish this? I am sure that there is a more intelligent way to do this but I am new in Houdini and any help is more than welcome. Aleksandar chimney.mov Test.mov
  8. Smoke keeps expanding

    Hi there, I'm working on a RBD destruction, but after the collision the smoke continues to expand. It should be a dusty smoke because there are not fire explosions.. I tried many ways, but it keeps expanding in the scene. I basically keyframed the emission of the smoke from the debris and it gives a nice shape to the smoke. What would you suggest? Attached you can find my scene. Thanks in advance! Tower_19_03_maybe_05.hipnc
  9. Pyro smoke issue in RBD destruction

    Hi there, I'm working on a RBD destruction project for my master degree. After I cached the RBD fracture and the debris I went on working on the smoke (using Billowy Smoke). I put in input the debris in order to emit a dusty smoke. The problem is that the trails don't look continuous.. And the smoke doesn't look realistic. Hope someone can explain me where I'm doing wrong, because is pretty urgent and I started using Houdini few weeks ago. Attached you can find my scene. Thanks in advance! Tower_19_02.hipnc
  10. Hey there, I'm working on a project for my master degree and i'm having an issue with glue constraint in my DOP network. It was working well until I deleted all the geometry and imported a new version of it from Maya. The ball should go through the wall and destroy the tower partially (just the active points), but it just bounces off. Could someone please explain me how to solve this issue? It's really urgent. Attached you can find my Houdini scene. Thanks in advance! Tower_16_more_windows.hipnc
  11. Hello Everyone, I have just create a ground breaking interaction effect on Houdini 17. In this tutorial we cover how to use H17 to creat ground breakking interaction with character. We will learn how to isolate inside group to create random debris, smoke and control the displacement on rendering of breaking parts. Please, Feel free to Check in here: https://www.cgcircuit.com/tutorial/ground-breaking-interaction Regards, Nhan Vo
  12. Senior FX Artist - LA

    Looking for a VFX artist experienced in rbd destruction simulation effects with thinking particles/Houdini as well as a Nuke/fusion compositor for projects. Must be local to LA and able to work onsite. Please send resume/reels to camarenamusic@gmail.com
  13. Hi, I am working on an airplane destruction with a skeleton underneath the fuselage. At first this worked quite well. ( SimV15_V5_goodImpact ) But after importing a newer version of the model with wings it completely ruins the simulation. ( SimV15_V7_Glitch ). Once I removed the breaks in the fuselage and skeleton mesh it works as it should again but the skeleton glitches through the fuselage. ( SimV15_V7_WingFixSkeletonBug2 ). So I know why this happens but I don't know how to fix it. I also don't really understand why the skeleton glitches through the fuselage mesh all of a sudden. Can two deformable surfaces work together properly? In attachments, you can find the file ( Simtest_15_V10WingFix_SkeletonIssue ) and the ABC ( B25_V30_Turbo_AllWingsV2 ) Btw I used steven knippings rigids 3 tutorial to get the metal deformation. Thanks in advance SimV15_V5_goodImpact.mp4 SimV15_V7_Glitch.mp4 SimV15_V7_WingFixSkeletonBug2.mp4 Simtest_15_V10WingFix_SkeletonIssue.hipnc B25_V30_Turbo_AllWingsV2.ABC
  14. Hey guys! I've made a fairly simple destruction on a procedural building (not textured) in Houdini, I'm going to convert it for Unreal Engine 4 using the game dev tools - I've tested this before and it works fine. What I'm not sure of is the best way to go about the texturing process from here. Presumably I need to set up my UVs in Houdini to start, then I'm not sure if you take the asset into UE4 first or whether you can work with the baked Houdini asset inside Substance Designer/Painter? Of course I might be missing the obvious solution so I'm looking for advice really!
  15. Houdini destruction RnD

    Hello everyone, So I finally finished that one, took me a little big longer that supposed to, but that's to due to the fact that I had to figure out couple of the stuffs. This is rather a prepration of destruction workflow in Houdini before digging deeper in something more serious. Here's the link -
  16. Cant see smoke

    Hey all, So, I have a problem. I have a large scale animation where a sphere (a meteor) is destroying a brigde. I have add to the debris node - billowy smoke, but I cant see anything of the smoke in my viewport. What I make wrong? I hope someone can help me here the file: Brige destruction.hipnc
  17. Can anybody help me with a method of using the rbd material fracture node and run it through the destruction cleanup tool in Houdini 17? I just need to understand how to provide the correct data to the cleanup tool to get it to work properly. I am just looking for the most basic setup because I cannot get it to work in any situation. The goal is to export an optimized destruction sim to unreal. I have done fractures in 16.5 and successfully ran them through the cleanup tool, but with Houdini 17, I am running into problems with it. I am providing a file where I am stuck. H17_DestructionStarter.hip
  18. Hello I just followed tutorial about Bendint Metal using hard constraint. (www.youtube.com/watch?v=38RhntxXcMI) and had some problems with setup hard constraint and need your help TT In my scene, I setup my hard constraint like left screenshot(red lines). and just like the tutorial, write vex codes for make hard constraint where middle of each constraints. This is guide geometry of constraints in dopnet. Left side is the tutorirals constraint one and right is mine. Modeling is different(I create my modeling my own), but I don't think It makes those difference in constraint. I set up Rest length option same with tutorial but what are those additional constraint points ?? I think those points causes difference with the tutorial so I need some helps to get rid of them. How can I get rid off them ? Sorry for my English TT
  19. Breaking constraints

    Hello guys I'm doing some testing on breaking constraints, for now, I was only breaking constraints based on angle, force, torque and using a slider for adjusting values. Do you guys have any techniques to share for breaking constraints, what kind of rules can be used?
  20. Smoke is "killing" me

    While the subject may have been true in the Bay Area last month, the subject is much more about the vexation of getting smoke right. I had found a little bit of time to go through Steven Knipping's Rigids II video and decided to add some debris and smoke. To source the debris and smoke, I processed the constraint breaks. For the smoke source, I made a tiny pop sim with noise and some velocity filtering. The smoke for the explosion has pretty high velocities, e.g. around 30 units/s. Initially, the smoke was basically just smooth mushrooms. I then introduced a high value disturbance against the velocity field in the low density areas. This broke up the smoke but I never was able to get it right. Here is where I ended after I had decided I had spent too much time; see video below - ignore obnoxious sound track :-) Would anyone here be willing to point me in a direction on how to improve this? I ran a bunch of wedges against lower resolution simulations. The overall smoke container ended up being really large, so sim-ing and rendering low resolution wedges took a few hours of turn around. Hip file attached for anyone who wants to take a look. Thank you, Niels. rigids2_v7.hiplc
  21. Hi, I'm quite new to Houdini so, I'm probably doing something really wrong. When ever I go into my Dop network for my sim everything freezes up and it takes several minutes for any change to update, it's nearly impossible to work with. I've attached my scene File Thanks a lot Josh ImageBased_Destruction_Cobble_Test_002 .hipnc
  22. Hello, i'm new here. I'm a 21 years old student and I have a VFX class every 2 weeks… I have a lot of difficulties with Houdini tho. Our first project is t break a wall with a ball and then put a texture on the wall. I really tried but everytime something didn't works. So I come here for help. I'll let you the project Houdini, a screeshot of the nods and the textures. There"s supposed to have an Arnold light but I don't have Arnold at home so. SimulationV3.hipnc Global nodes: Textures: Constraints: Force: Thanks for your help!
  23. edge fracture

    Hi, Do you guys know how to make this effect? I mean small pieces on the edges of fractured pieces. It is a part of keith kamholz's tutorial and i can't afford it because expensive for me. Thanks.
  24. Any idea how Boolean sop fits with the new rbdmaterialfracture node in Houdini 17?
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