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Found 99 results

  1. Boolean Fracture Seams

    Is there a way to fully eliminate seams in a model after a boolean shatter? I'm able to get rid of most of the seams with the boolean 'unique points along seams' flag and a Normals SOP, but in both Redshift and Mantra renders it's still clear that the surface has been shatter before a sim is applied. Any way around this? -- mC Boolean Seams - Sphere - 01.hiplc
  2. Hi guys, I created a sim with proxy pieces and then tried to transform the high res pieces with the sim data, but for some reason it gets messed up. I set the pivot and transforms with setprimintrinsic. Please see below. It seems to have done different things for different groups I've split them into. After the initial fracture, I've split the pieces into small, medium and large pieces and fractured the large pieces again with added constraints which I intend break later in the sim. You can see the correct size of the figure in the middle, which seem to be the large pieces. Could someone please take a look at my file and tell me how I could fix this? Angel_goes_toheaven_cleaned.hipnc
  3. Hi, all...need to do a shatter effect where the outer 'shell' of a static (for now) character/figure crumbles to reveal a different material/surface beneath. Been doing a lot of testing with a simple torus as it's a fair representation of the tubular topography of most of the figure (arms, legs, torso, etc). I feel I've finally got a good grasp on all the fracturing basics, but for the life of me I can't keep the outer shell fragments from interpenetrating with the underlying shell. I've tried: Increasing the DOP network substeps Increasing the rigid body solver substeps Switching the RBD packed object geo representation from Convex to Concave Altering the collision padding based on what it does to the guide geometry Increasing the number of fragments in connection with all of the above The changes either lead to little difference or in cases where I kick up the substeps and subsequently (I think) the precision, the fragments do the old-style 'exploding off the surface' thing. At this point, I have to wonder...in this situation should I just switch to the RBD solver? I'm okay getting hammered on sim time if I know it's going to work in the end. Oh, and a question about the collision padding...is that designed to pad the fragment intersection with other surfaces, each other, or both? Any help would be great. Really been banging my head against the wall on this one. -- moltenCrazy Shatter Tests - Torus - 02.hiplc
  4. fracture trick

    Hi guys, I have seen in some videos that kind of fracture (large, medium and small chunks) but i don't understand how they make it. Can you show me please? Thanks.
  5. Hello, could someone explain to me what this parameter does exactly? What is being sampled for tolerance?
  6. Hello, This is very strange behavior, wondering if someone knows whats going on or if this is a bug. So I have a simple cloth set up involving a rest shape and fracture. I noticed when I had both rest shape (or target deformation) and fracture enabled, my cloth would randomly move in strange patterns. I could not figure out what was causing this, it's almost like extra velocity is being added. I got lucky and decided to delete the bottom section of the sphere rather than use a clip node. For some reason, that fixed the problem. Why would using the clip node cause all this weirdness as opposed to deleting the geometry with blast. I added a switch node in my scene so you can see both variations. thanks in advance cloth.hip
  7. Hi, I came across the Visualize Noise Scale option in the Voronoi Fracture and realized this would be the perfect approach to texture a project I'm currently working on. What I'm after is a way to use a gradient or uv map so the inside fractures are textured like layers of peel. To illustrate this, see the attached image which is what the Visualize Noise Scale gradient looks like. How would apply a texture and UV map the pieces in a similar way? There is an outer color (blue) and the inner color (red) as part of the Visualize gradient, so there must be a way to map the fracture pieces using similar coordinates via UV or expression. Any help would be greatly appreciated. Thanks!
  8. Hi All! So we've all used a voronoi fracture, and seen it used. That's the problem! Is anyone able to suggest methods to stop the voronoi fracture fracturing with the classic voronoi look with more ‘randomness’? Obviously it depends on the material we’re fracturing but just in general Thanks all.
  9. Hi ! I am working on RBD in Houdini 16.5.268 and I render it with redshift 2.5.56 I have some problems during the rendering : we see the edges of the fractures ! I tried a lot of things without managing to get rid of it. It works fine in mantra, no artefact. My geo has UVs, Normals and rest position. Do you have any idea of how to correct that please ? Scene is attached and some pics of the results. PS : I also had other problems while rendering rbd in redshift. In some scenes, applying two different materials with different displacement values on inside and outside groups of an object results with a gap between inside and outside faces. In other scenes, the displacement of inside surfaces flicked. It seemed that it was moving along time, I didn't find out why. I read the redshift documentation and watched several tutorials but maybe I don't work the correct way with displacement in redshift, could someone help me ? Thank you very much ! Have a good day ! no tessellation no displacement tessellation no displacement no tessellation displacement tessellation displacement mantra displacement material MAT_prob_v01.hipnc
  10. Hi, I'm currently trying to texture the inside and outside of my fracture geometry, however, I have been creating a group 'Inside' and an 'Outside', which I have created UV's and a material node fine. Its when I view the dop import node it gets rid of the groups meaning the materials have gone.... could anyone help i'm really struggling, thanks, Here is the .Hipnc file... Fracture_Project_V03.hipnc
  11. Problem with UV

    Hello! I'm having some issues with keeping the UVs on an object that i'm breaking in Houdini. I checked and the UVs are in the imported geometry. In the DopNetwork, after the rest node the UVs are still there, but then they're gone. How can I preserve them until dopimport and further Alembic Export?? Can't post any files but this is a simple setup with a Voronoi breaking geometry with a scatter over itself. Feel kind of dumb and might be overlooking something either very basic or very important. Thanks in advance. Cheers
  12. Hello , just wondering if it is possible for pieces in an rbd sim to reassemble according to the positions specified in the sop level i have a simple fractured sphere (about 60 pieces) , and looking to reposition each piece based on the exploded view outside of dops i have managed to get an almost correct animation by using an Sblend after caching out the sim , but obviously no collsion between pieces would be present. I was thinking of trying to create an attribute with the positions of the exploded view and rerouting it back into dops. does anyone have an idea of how to tackle this, much apprieciated for your help
  13. Hey All! So i'm scattering points on a geometry to Voronoi fracture to break into multiple chunks. There is a portion of the geometry I want to break of in just one chunk Is there a way to tell Houdini not scatter points in that particular area of geometry? Thanks everyone!
  14. Hey all! I'm shattering an object with voronoi and obviously the result is a bunch of pieces with straight segments, but what I want is pieces with curve profiles, like the image attached. does anybody have any idea on how to achieve that kind of look? cheers!
  15. Hello ! I tried to make fracture for game engine but I stumble into several problems : Most of the time the object I need to fracture is lowpoly, when I try to make them hollow I encounter several problem. Usuing booleans with sphere I get ugly topology (ngons, floating triangles) is there a way to polyreduce it without breaking outer shell and existing UVs ? Anyone tried to shatter using booleans like the video ? Thanks
  16. 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!
  17. Hey, I'm trying to create a Sail and Mast rig so I can smash it up with cannon balls. I've got a cloth sim constrained to the pieces of a RBD fractured object making up the woodwork for the mast. I can get the cannon balls to collide with the sail and mast and get the sail to tear right, but the canvas won't pull on the RBDs like it should; they just stay still like they're static objects. Everything's set to mutually affect so I'm not sure what's up. The woodwork is also set up with Fracture Params so it will break but that doesn't work either... Thanks in advance, J JunkSail017.hipnc
  18. RBD Fractured Obj with FLIP?

    Hello! I'm doing R&D for a project that will involve and egg breaking, releasing the yolk/white. Right now I'm just trying to get the principles down. I am currently just testing fluid inside an egg (making sure it stays inside when it's supposed to and falls with the egg in gravity) and am having issues with the fluid disappearing or leaking from the egg. I am used to using rbd packed objects for destruction so I started out my workflow with the egg as an rbd packed object, but saw some examples on here that suggested using an rbd fractured object so I have tried that as well. When I use the egg as a packed object, the fluid seems to just slowly disappear over time, and when I use a rbd fractured object the fluid sticks to the eggshell on the second frame and then flies out. I know the eggshell is thin geo for being a collision object (it is accurate to a chicken egg), but even when I thickened the geo I still had fluid disappearing. Any advice regarding using fluid inside rbd objects would be appreciated! egg.zip
  19. The Cube

    Hey all, I got super excited on this image and started to make something based on it And now I'm reaching out for some guidance. Attached is where I was heading... still not getting the nice symmetry and variety that the image has. Any help would be appreciated thanks! cube_v001.hipnc
  20. The Cube

    Hey all, I got super excited on this image and started to make something based on it. And now I'm reaching out for some guidance. Attached is where I was heading... still not getting the nice symmetry and variety that the image has. Any help would be appreciated thanks! cube_v001.hipnc
  21. Simple project to learn Houdini

    I'm new to this place, so apologies if I'm being dumb about anything. The project is to fire a beam at a piece of geometry, and have it fracture at the point of impact, like a simple sci fi gunshot. I have a rough idea of how to do the destruction, but which nodes should I use to cast the ray, and then find the intersection? Also how do you even define a direction or a vector to start off with? Currently I'm using a very long single-span curve, but I'd like to find a way to cast the ray infinitely. Any help is much appreciated. Thanks very much.
  22. about cache

    hi guys i am new in houdini and i am making fracture project and i am using file cache sometimes. if i change something, do i have to get file cache again? because it takes long time. thanks.
  23. Hey, I would like to add some detail to the interior faces of my fractured geo. I have separate materials for the inside and out. I added a displacement noise to the inside shader. The only problem is that it breaks the edges. How can I get some detail like that on the faces without breaking the geometry? Thanks
  24. Hello all, Newbie calling for help here. Now, more angry and with less hair... I am trying to export out an alembic file that will have my packed fracture in a grouped hierarchy rather then a solid piece of geometry. My end product would be an alembic that I can auto assign bones(via script) to each piece of geo inside of maya. From there I would like to export out as an FBX. My geometry setup in houdini does have an Assemble node with Create Groups, Create name Attribute and create Packed Geometry selected. In my fracture voronoi I have an attribute created called piece. Also in my voronoi tab under groups Ive selected create groups with named prefix, interior and exterior groups. I dont know if Im setting up my tree wrong in my fractured Object (Door) or if my settings to render out with a ROP Alembic are jacked. So my question is 2 fold, Am I setting up my packed fracture correctly to give me individual pieces come alembic time. AND are there special settings/ and or combination of settings of both. Ive read the manual, rumbled through sites and still no bueno. I've included my scene for further diagnoses. ANY help would be greatly appreciated. I've also tried incorporating Laidlaw's RBD/FBX export into my hip and couldn't get it to work. On that note any FBX workflow that can be recomended. I tried the game tab RBD to FBX export but I'm confused as to what node to export I should select in my file. Everything Ive tried so far just throws an error Again I appreciate ur help! DoorExplode_OD_v005.hip
  25. Hi, I'm pretty new at Houdini and am trying to find a way to get fractured objects from different glue networks to glue together. For instance, I want the wood of a window frame to have different glue strength than the glass in the widnow, so the glass shatters more easily than the wood. But I also want the edges of the glass to be glued to the frame. My attempts so far only manage to glue every piece of glass and wood together in a third network which is not what I want; I want only the glass pieces adjacent to the wood to glue together. Is there a way to do this procedurally? Thanks