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Found 49 results

  1. Hi im in houdini with a geometry that has a texture. i render with a camera that has transform information such as translate, rotate, also the pixel aspect, focal lenght and aperture etc i render in 1920 x 1080 if i know the geometry points position in the 3d scene, how can i calculate in which coordenates in 2D 1920x1080 those points gonna finish at?
  2. Hello magicians, I've been struggling with this all the morning, reading on forums and trying different stuff (att transfer, att promote, att interpolate, p deform) with no luck. I'm studying a file done by Ian Farnsworth , a awesome growth effect done with vdbs and curvature/gradient calculation. Now I'm trying to add a texture that sticks on the deformed sim, coming from a solver sop, but the texture doesnt stick. it keeps on the same space, I need to do this in order to texture properly in C4d (octane) http://i.imgur.com/mPryDKP.gifv File by Ian: http://fx-td.com/content/misc/recursive_growth_v2.hiplc Any help will be really appreciated. Thanks!
  3. Hello everyone! I am creating a pool of lava and am struggling with creating displacement for it. The problem is the remeshing every frame. How can you make points which are generated at the first frame follow the colour they have been given? My idea is once I have figured this out, to use those points for the position of the displacement. Any help is greatly appreciated, thanks! points_follow_colour.hip
  4. Hey guys, I am following the Game Tutor - Procedural UV Mapping Tutorial, and I run into a problem. The first example with the street works as demonstrated, but the box uv mapping kinda fails. Looking at the uvquickshade I don't get a result. The box stays grey. I attached the file, maybe someone would be kind to check if I am doing something wrong? I am using H16 Edit: Just to clarify, I went over and over the settings, and either I am blind or ... so I put some milage into it. Thanks, Igor box_uv.hipnc
  5. Hey guys ! I followed through Ben's tutorial on the gorgeous melting angel flip simulation. I'm trying to achieve this effect on a personnal project, with a Rubik's Cube. The only way I found to keep colors on my cube's faces is to have UV's and texture on it. I googled my problem and I found many topics similar as mine. Like Toadstorm topic's on his blog, like rurik topic's on ODForce. So I tried many solutions but I can not get a satisfying result. Could you guys help me to figure what's wrong ? I attach my HIP file, sorry it's quit heavy :/ Thank you in advance for your answer, Gael. RubiksCube_v01.hip
  6. Hi, I've got serious problems to figure out the wright UV's for my carved object. Also tried it with Polys instead, but the same and I prefer Nurbs. So.. Where is my mistake? Thanks in advance and good times. VDB_crack.hip
  7. Hey guys, I really need some help here, I'm in the middle of a project and can't export the simulated cloth with proper UVs (exporting it as alembic / must work in Maya) Here are some statements about the situation: - if I export the grid mesh, with no simulation, the UVs are read correctly outside of Houdini; - if I export the simulation, directly from the dopimport1 node, it doesn't work outside of Houdini; - the UVs are ok when I import it back to Houdini (and unpack the geometry); - the cloth is gettin' ripped on my original scene, this way I can't use an attribute copy to get the uvs from the original mesh (since it's point count is changing); - If I import it to 3ds Max, it work's at the first frame but as soon as I run the timeline it get id of the uv. I can get the 1st frame uv to stick to the object if I add an Unwrap UVW modifier to it. Tried to export it from Max to Maya but it doesn't work; I did a quick test here in a much simplier scene, with a plane only and get the same problem. The scene file is attached + 2 exported alembics (with and without simulation) Thank's in advance Cloth Problem.rar
  8. Hi! I don't know how to solve a simple UV problem, I created a basic file where i can recreate my case. I just want to get UV's sticked to the geometry, even if there is a rotation or gets partialy deleted. I tried using Vertex Sop for MAP matching, but no results. Can you help me? Thanks! UV_Problem.hiplc
  9. Hello, is there a VEX function for sampling N at arbitrary location in NURBS surface (based on uv location for example)? One way would be to convert NURBS to polys and get normals from them. But I thought that maybe there is easy way of getting N directly from NURBS? Thanks, Juraj
  10. Hi all... I've got a shape with some animated deformation & I've got wires sprouting off the surface, simulating happily. Now I've extruded these wires to achieve a sort of tinsle/fur effect. With the help of my work colleague I've managed to normalise my UVs so that each "fur" strand occupies the whole UV 0-1 space. However, as with most simulated things I need to bake this to avoid texture swimming and I'd like to use attribute-interpolate to lock this UV layout throughout the simulation now & I'm struggling to get the node working. (Said colleague has gone on leave now.... *shakes fist*) Could anyone take a look at my file or point me in the right direction? I'm assuming I want to interpolate to vertices & use vertex numbers and weights... and I'm assuming I just need to tell it that vertex 1 is vertex 1, with a weight of 1? Or do I? Also what is the deal with the polyextrude SOP? I just can't seem to get it extruding edges in a predictable and consistent direction, no matter the normals that I feed it! Many thanks fur_doughnut_001.hip
  11. Hello Guys, I am playing around with houdini on an extreme beginner level. Nevertheless I made this setup where I have moving fracture pieces over the surface. My question is. Is it possible to make texture stick to those pieces so not only pieces but also the texture flows and distorts itself over time? I so much would love to see that happen but my knowledge is not so deep to understand how could I achieve that. Especially because I assume that its not case of regural fracturing and geometry is different with every frame. I am using standard voronoi fracture node with points scattered into volume and I am making them move with vdbadvectpoints inside of a solver node. Do you think its possible to achieve the texture to stick to the pieces?
  12. Hi! Could you plz tell me how to make a world base texture in Houdini ?
  13. Hello guys, i think this is a peculiar problem I have to "fuse" 2 meshes and VDB looks just perfect for the job. The 1st mesh is an orange (alembic) and it have some perfect UVs. What I did is a simple vdb setup to combine the 2 meshes + an attribute transfer to get the uvs from the orange but, unfortunatelly, it looks like some of the polygons are still connected in some parts where it shouldn't be. Does anyone knows a solution for this? I can't share the original scene so I've recreated it in a simple way. The original one have a face to mix with the orange. here's the images + scene file (with abc) in case someone can have a look at it Thx again, Alvaro UVs Transfer Problem.rar
  14. Hi there, as title says I'm doing a simulation with solid objects and obviously after appending the tetrahedralize sop to the geo, before importing it into dop, I lose my uv attribute as expected. Is there a work around to this problem? What if I want to apply the previously generated uv layout to the simulated object? I've tried rendering out the sim with a rop_geometry node and re-importing it so to transfer uv attribute using attribute copy, but it does not work, I mean houdini doesn't play my animation anymore. What's the usual pipeline when working with solid object?
  15. Hello everyone, I'm doing a destruction project where I need to isolate the front faces of bricks in a bullet sim so that I can export out a UV pass of only the front face to use in compositing. I know how to setup Mantra to export out an overall UV pass but I'm not sure how to isolate only the front faces of my bricks geo in the UV pass.
  16. Hey there! Before I begin to describe my issue, please keep in mind that I am a beginner at 3D modelling and am still learning. The problem I am encountering is that I have installed the Quixel Colors tool to texture my model in Quixel. The problem is that once I try to render the material map, I get the following error in the Houdini Console: Traceback (most recent call last): File "C:\Users\Scott\Desktop\Quixel SUITE 2.0\quixelcolors\lib\QuixelController.py", line 129, in <lambda> File "C:\Users\Scott\Desktop\Quixel SUITE 2.0\quixelcolors\lib\QuixelController.py", line 149, in openDDO File "C:\Users\Scott\Desktop\Quixel SUITE 2.0\quixelcolors\lib\QuixelController.py", line 127, in <lambda> File "C:\Users\Scott\Desktop\Quixel SUITE 2.0\quixelcolors\lib\houUtils.py", line 148, in bake File "C:/PROGRA~1/SIDEEF~1/HOUDIN~1.523/houdini/python2.7libs\houpythonportion.py", line 341, in setParms raise hou.OperationFailed("Invalid parameter name: " + parm_name) hou.OperationFailed: The attempted operation failed. Invalid parameter name: vm_renderengine I am not sure that I can identify the problem and hope that someone can help me with this! Thank you in advance for your efforts.
  17. Took me a while to get this far on this project. But I managed to somewhat recreate the derez effect from Tron: Legacy.
  18. i simlated a fracture animation ,then i wanted to export it to maya ,but i found no uv in the alembic file. even though i read the abc file by alembic node , there is no uv too.the model has uv in houdini file. plz help forgive my poor english ,hope you guys could understand it
  19. Hi community, I'm trying to use the primuv vex function to move an object along a curve in sops and have it correctly oriented as well. Any ideas? I've attached a hip file. Thanks. obj_along_path_SOPS_01.hip
  20. Hi All, I am trying out Mari NC to see what kind of workflow is needed to get UV models out of Houdini and into Mari. In this image I have nice a Box projection that provides a decent looking UV grid across the object. However, if you examine the UV grid you will see that there are a lot of overlapping areas which will not work with Mari. Overlapping areas mean if you paint on one face color may appear on another unintended face. So I have tried out the Houdini UV layout tool and set the scale to limit my UV layout to the maximum of 6 UDIM squares that Mari NC allows. And while this fixes overlapping faces and makes a UV set that Mari can work with it destroys the ability to select associated faces via a UV island. Also there is a ton of wasted space. It looks like the algorithm finds the largest area and populates all the large UV areas on one UDIM tile then moves on to the next UDIM tile, not considering that it could actually use 6 UDIM areas to start with. As you can see the UV faces get smaller and smaller as the UDIM count increases. This ultimately limits paint resolution in Mari when you have to paint on slivers. If the Houdini UV Layout area distribution were smarter I could increase the scale and reduce the number of sliver elements generated. Also, selecting faces in Mari is fairly primitive yet selecting UV islands is quite possible but with the islands split into so many tiny areas selecting by UV areas becomes quite tedious in Mari. I am just wondering if anyone has any tips on UV layout workflow? This probably applies to Substance Painter users as well. ap_runabout_uv_projection_layout_1a.hipnc
  21. Hey all, Ok, so I have a line, which I am duplicating (manipulate) 10 times, then feeding into a wire sim. After the sim, I am animating a fuse on the wires to create an effect of 1 wire turning into ten, then doing a polywire. My question is, how should I map my UVs so I can texture the polywired wires separately? Obviously this is a little tricky because of the fuse, as it's creating a non-consistent topology. Any ideas? Unfortunately I can't share a .hip right now, but the setup literally is as simple as I described, you could even replicate a similar animation by just animating offset in the duplicate sop. As always, thanks in advance for any pointers!
  22. Hi everyone, I'm trying to solve a tricky problem in Houdini, and I could use some help! I need to project my live action plate onto some 3D dummy geometry and essentially bake down every individual frame. Essentially what I'm trying to produce is a 3D representation of my scene using the live action images as a diff map, because each projection should either overwrite or paint in new areas of the scene. My geo matches the scene and the camera is tracked and solved from the plate and matches well. The shot doesn't include any moving objects so we don't have to worry about that. I have experimented with the sop solver, the bake texture rop, and material layers, but I haven't quite made a breakthrough just yet - as these are concepts that I don't have very much experience with. Any guidance or suggestions will be very welcome! Many thanks
  23. Hello ! I'm not sure I'm at the right place but I would like to share an asset with you. It make a cubic projection, not revolutionary (As that exists in all others common 3D packages) but is missing in Houdini (correct me if I'm wrong). Additionally I add some options for automatic alignment inspired from the code of this author : http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&p=88114&highlight=#88114 Quick Demo : I hope you like it ! Cheers. uvcubic.zip
  24. Hello All, I am using VDBs to combine geometry and I am interested in a way of maintaining specific attributes from the two input geometries. Currently I have two poly objects which are being converted to VDBs and then combined using VDB combine and then converted back to polys using VDB convert. What I want is to be able to identify which polygons on the resulting combined/converted object comes from which input object and also maintain their respective UVs. I have had some success with using the second input of the convertVDB node to transfer attributes. Using this method however, I am only able to maintain some of the objects attributes, not all. I've attached some images and a file to demonstrate my issue. In the attached file I have three objects; Base, Add Sphere and Sub Sphere. All objects contain UVs and an ID attribute (tmp1), they are all converted to VDBs then combined using VDBcombine nodes. Finally the resulting VDB is converted to polys using convertVDB. When both original sphere are input into the second input, the UVs and ID attributes are transferred correctly however the Base object is not. When all three objects are input into the second input of the convertVDB, only the Base and one sphere's attributes are transferred correctly. I have tried several different combinations and methods of making this work to no avail, but it feels like I'm so close if I can get all three objects to transfer the attributes correctly, just not all at the same time. It is possible to use two convertVDB nodes, one with the two spheres in the second input and the second with all three objects in the second input, then deleting the problem polys from either (using the ID attribute) and then merging the two together, but this is not very ideal. In the image on the left you can see the results of the convertVDB using only the two spheres as the second input, the middle image is when using all three objects (base, add_sphere and sub_sphere), and the right is an image of all three input objects showing their UVs. I am new to VDBs so I was hoping someone might have some alternative methods or could point me in the right direction. Thank you all in advance! Cheers, -Mat VDB_attributes.hip
  25. Hi, I'd like to have some dynamic objects, or particles and then project the uv's at a certain frame, it can be the last frame and then I want them to be locked to the geometry to from this frame and the first. I tried with rest node but I could not achieve what I want. Can you help me? I sent a file with a example with some spheres. uvs_lastframe.hiplc