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Found 140 results

  1. Hi, Is it possible to export animated geometry (Alembic/ OBJ sequence etc) from Houdini Apprentice? Thanks a lot Josh
  2. Hello, I'm working on a project and I'm a bit stuck on matrix transformation. I don't have a strong background in matrix manipulation. Here is what I am trying to do: I have a packed alembic that has been created from an external program. The alembic has a fullpackedtransform intrinsic that contains my translate, rotate, scale and shear data. I want to shatter this alembic geometry, pack the shatter pieces and use the original alembic transform to animate the pieces which will then be input into a rigid body simulation. I'm having trouble extracting the relevant data from the 4x4 matrix on the alembic. I can get my points to translate, but I don't yet understand how to make them rotate. I hope my diagram makes sense.
  3. I have an exported of an .FBX and .ABC format. I'm trying to get rid of the name issue in houdini when using FBX. But .ABC doesn't have this problem as I can use "Name Group Using Transform Node Name" in the option below. I used a blast node to display the groups which I group them in maya. FBX : @ALL_Windows/Windows_1/Glass ABC : Glass
  4. Houdini23ds max through Alembic

    Hello, So, first I exported flip tank particles in .abc format then I load that in 3ds max with vray proxy. But how to render them with proper whitewater or ocean shader? It is rendering a blobby mesh in my case. And there is also absence of particles in some frames and some kind of clipping in between. Can someone please guide me in this. Thanks in advance.
  5. Hi, Recently I had to develop a method for Alembic Sequence files export from Houdini and Load Alembic Sequence files in Maya, I couldn’t find any solution for this problem at that time, so I decided to develop some Python script to do these tricks. Below you can find my tutorial and source files for abc sequence files Houdini to Maya. Hope you find this useful in your workflow. If you have any questions or anything feel free to replay here. Thanks, Mahesh MS. HELP_abc_sequence_files_Houdini_to_Maya.pdf abc_seq.zip
  6. Hi, Recently I had to develop a method for Alembic Sequence files export from Houdini and Load Alembic Sequence files in Maya, I couldn’t find any solution for this problem at that time, so I decided to develop some Python script to do these tricks. Below you can find my tutorial and source files for abc sequence files Houdini to Maya. Hope you find this useful in your workflow. If you have any questions or anything feel free to replay here. Thanks, Mahesh MS. HELP_abc_sequence_files_Houdini_to_Maya.pdf abc_seq.zip
  7. Hey magicians, I have an RBD sim that when I export as bgeo looks fine, but when I export as alembic it goes crazy, the geo flies everywhere, anyone know what can be causing this? P.S: Also sometimes don't show in Arnold, I tried deleting "name" attribute and works, but not sure what is causing this, maybe because I have lots of dop networks? Thanks!
  8. Hi forum. I am trying to export simulated curves from Houdini into Maya using Alembics so they drive the XGen anim curves. I have exported curves from Xgen into Houdini and connected them to the 16.5 Hair System and simulated them. The problem is the Alembics from Houdini are exporting all the curves as shape nodes under one curve, instead of exporting each curve separately. XGen's Anim nodes wont read these. Does anyone know how to export curves from Houdini into Maya with Alembics without them packing?
  9. Alembic Velocity Issue

    Hi guys I am having a rather strange issue. I have a particle system which is advected by volume from a pyro sim, and then I have bits of geometry copystamped to this system. But when I export this to Maya with ROP Alembic I am not getting velocity. What's strange is if I do a convert to points from volume using the original pyro sim, copystamp that and export it instead... the velocity works in Redshift Maya.. why does it break when using points from pops? Does anyone have an idea about what's going on? EDIT: Found a workaround. Convert the velocity to colour in houdini, and use it as the motion vector source in Maya mesh controls.
  10. Hello I have an animated Alembic file which I am piping through the instant mesh SOP ( game shelf tools ). How do I export the mesh's state at each frame into separate files ( Obj/Fbx) ?
  11. Hello! I hope someone here can help me understand how I can access packed alembic geo. I have 2 sets of alembic files. One which is a point cloud where the points have a attribute called "inst_obj" and the second alembic contains the geo which should be instanced to those points. I could use a single alembic for each geo, but it would be more handy if I could have the geo in a single alembic file. I just can't figure out how to access the attribute and instance out the corresponding geo. Does it make sense? (simple alembic files are attached) best regards stefan bblock_geo.abc bblock_pos.abc
  12. Hi there! I am trying to use my flip fluids sim in unity, so I export it as alembic; everything works fine, except for the whitewater. I supposed that is because it is points and not geometry, any clue about how could I use my whitewater in Unity? Thank you all
  13. 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
  14. Hello, I know it is basic question but I still think that there is a confusion. What is the workflow to bring whole bunch of models from 3ds max(or any 3d package) to houdini with textures? Because we cannot relink the textures in houdini by hand, it will be very very time consuming. Or I think there would be a script out there to relink materials after importing them in houdini. Thanks.
  15. Hello, I have a feeling this is a common issue, but its a bit hard to explain / search for a solution. I've imported an animated alembic file, used unpack to get the points and put it through a trail node to get the point velocities, the problem is that the point count changes as some of the objects "disappear", so you get brief flicks of extreme velocity as the point IDs shuffle, I am curious about the method(s) for dealing with this problem.. Thank you
  16. Alembic export

    Hi there, I have a problem exporting an .abc into C4D. I always did the same workflow: Simulation/ROP alembic output driver(bgeo)/File (load the .bgeo)/ROP Alembic export/Open in C4D/work like a charm. But recently i've changed my computer and for the first time I tried to do and animation and make an alembic, doesn't work I tried a lot of things and I'm desperate right now, but I think somehow when I export .abc don't concatenate all the files and when I open it on Cinema, it only read the first frame. You guys know what I mean? Is not a problem of Cinema (I open and old .abc file already and works great) I use : Houdini Indie 16.5.473 Cinema 4D R19 I share the file with you guys, thank you in advance. Appreciated the help. cuadradro__boole.obj Flujo_indie.hiplc
  17. Hi there, I'm trying to stick points on an animated alembic without the points moving all over the place. At the moment I've got my alembic attached to a vdbfrompolygons to scatter. How can I make sure that these points will follow the alembic geometry? (the polycount doesn't change while animating) Thank you for your time and help. (I've attached an alembic file) AlembicTestFile.abc
  18. Hi ! I have some problem with export :S I imported alembic file from C4D to Houdini and simulate some props. then, I cached that simulation and export with ROP Alembic Output node. and when I import that abc file at C4D, All textures gone T_T Where Do I have to add Rest position and UV texture nodes ?? It is too difficult to me Help me ! I set up my nodes like this. Imported alembic file -> blast props -> unpack each prop, add rest position and uv texture node -> pack -> simulation(DOPNET) -> file cache -> convert node (If I didn't add this node, Houdini get fatal errors) -> ROP Alembic Output. At the pack level, I added ROP Alembic Output and export it for test. and It works ! but when I finished simulation and cache it, use convert node and ROP Alembic Output nodes. Its Textures are gone T_T How Could I do ?
  19. 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.
  20. Hi there! I would like to render my water sim and whitewater in c4d to integrate it with an animated scene. I got two questions. 1. I was wondering what a good workflow is to render the simulation out over to c4d, are alembics still the best way to do this or is houdini engine faster or are there other ways? my 7 million points seem to be very very heavy for c4d in alembic... 2. How do I render out the whitewater correctly in c4d (octane render) does this need to be GEO or particles for rendering? and also how do I get that nice lifespan on it too. Thank you for taking the time to help me out! Cheers!
  21. Hi all, I have a hard-surface vehicle animation coming into houdini via alembic (no deformations). The vehicle needs to be fractured for a RBD sim. The first frame of the alembic is the vehicle in its rest position. This is where the fracturing is done and the constraints are setup. Now, how would I apply the animation in the alembic onto the fractured pieces? The transform pieces SOP only gives me translation. I guess there needs to be some wrangling with intrinsics happening? I attached a simplified scene with an alembic, maybe somebody can take a look! Thank y'all! cube.anim.v3.abc transform.frags.w.alembic.hipnc
  22. Export Points to maya 2017

    Hi, I looking for a way to export points/particles from houdini to maya. Houdini 16.5, Maya 2017. I've tried exporting in alembic, importing in maya with exocortex, but nothing work. Houdini digital asset is not a solution for me (render farm, licenses ...). Any solution ? Thanks a lot
  23. Hi all! I have alembic file from Maya and something wrong with it. If I rotate it in SOP context with attribute wrangle node or transform node rotation is okay, but if I rotate the same geometry in DOP it fluttering as if pivot is offset. I think it is on the Maya side not Houdini. The question is is it possible to fix it in Houdini? Or only to take back in Maya? I tried in Maya though but I didn't find a way to fix this geometry for proper work in DOP. abc_test.rar
  24. Hi, I have a complex model came from Maya in alembic format. It has several UVs and many parts are shadered in houdini. I'm talking about few dozens of Material nodes in Materials and Shop. Is there a way to change the alembic without the need of reassigning all the material nodes? A solution would be much appreciated
  25. Getting random flashes of rectangle geometry after rendering Alembic sequence to disk from Houdini 16.5, see below: Would it help to share all of my FLIP, fluid particle, static object node attributes or is this a familiar problem people have run into before?