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Found 129 results

  1. Hello guys. I was wondering how to get the uv's from a rest position (time shift to frame 1) to a deofrming mesh. Otherwise my uvunwrap flicckers and calculates each frame which is not okay. Thanks a lot. P.D: Point number doesnt change.
  2. Hey guys! I require help dealing with packed alembic within houdini 17.5/18. I have a heavy geo but im getting an issue with textures not showing properly unless unpacking but unpacking causes scene to be extremely heavy. So is it possible to keep it a delayed packed primitive and unpack only the uv attribute to maintain the scene being lighter and yet allows the unpack uv to be read within renderman for houdini. Any thoughts?
  3. Hello; I would like to use the existing UV of my imported geometry as a starting point of UV mapping, So I tried UVFlatten SOP. The problem is by selecting "Preserve Seams", it locks existing UV seams and I can't sew them. How can I fix it? Thanks for helping.
  4. I've got some geo with 120+ leaf geometries and I'd like to procedurally move each geos uvs to it's own separate UDIM. I'm currently using a for-loop and some modulos but it's not quite working right transform x on uvtransform28 = detail("../foreach_begin8_metadata1", "iteration", 0)%10*2 transform y on uvtransform32 detail("../foreach_begin8_metadata1", "iteration", 0)-detail("../foreach_begin8_metadata1", "iteration", 0)%10 Any ideas?
  5. Viewing Additional UV Maps

    I'm trying to view an additional UV map. uv (a 3flt) views just fine. However uvWind (also a 3flt) refused to appear in the UV Viewport dropdown. I created a third with the UV Texture node - uvWind1 - and that show up just fine. Though I notice that as well as being a 3 channel float like the others Houdini has tagged it a Tex. How can you tag an attribute as a Tex so Houdini treats it as a UV channel in the viewport? Thanks!
  6. Hello; In the UV edit view, I want to load a texture from disk, as a UV background, but I can't find any option. Thanks for helping.
  7. UDIMS

    Hey magicians, I'm fighting to get proper UVs to substance, I made a signage with multiple elements, each one got their UVs working. Now I'm trying to export each uv organized and in separated UV islands, tryed uv layout but make's the UVs weird, if I change scale to "Fixed" they look good, but they dont have layout per island in the UV viewport. Any advice will be super helpful Thanks!
  8. Hi, I'd like to sample the UVs and texture from the models i intersect with but don't know how... Any advice ? Thanks Escherisation.hipnc
  9. Non overlapping UV's

    Hi all, I'm looking for a way to ensure I generate guaranteed non overlapping UV's. (Besides exploding it into all triangles and a huge mess). The resulting UV's don't need to be super great, the importance of fixing the non overlapping issue is key. flattenUV and unwrap and all tools I tried on my sometimes complex meshes produce overlapping artefacts. Thanks for any help!
  10. Hey all, Ive been following a tutorial on how to transfer the UV's to simulated flip fluid and all was going well untill I added a remesh node to the transferred UV attribute which was supposed to smooth out the mesh to preserve the detail of the texture. Instead what has happened is that the UV's have gone from being seperate shells to having all their edges connected together. There is already a vertex split in the node graph which fixed the issue before I added the remesh node. Any help would be greatly appreciated, I've provided the scene file - thanks a bunch Melting_Example_v001.hiplc
  11. Problem with UVs after fracture

    Hi guys, I have a problem with my workflow Maya -> Houdini ->maya. Let's suppose I've modeled an asset in Maya and then I want to fracture it; I usually import it as an alembic, do my fracture, create UVs for the inside faces, etc... and then ROP it out as another alembic, keeping my original UVs and hierarchy intact. Super simple setup example Now, the problem is that the original UVs, have the new seams for the fracture, but some points are fused together. This creates some manifold error in Maya and means extra steps to fix it; also, inspecting the UV connectivity in Houdini, all the outside parts appear to be under the same island. There is a way in Houdini to split the UV island into the individual fractured parts, even if the shells when points are overlapping? What I get What I expect (created adding a cutPlaneOffset under the voronoi node, but is something that I don't want to do) Walkaround that I've found: ROP out an OBJ doesn't have this issue, but the OBJ can't store a hierarchy like an alembic Add a unique path attributes to each fractured piece, but then I need to re-combine the object in Maya and re-adjust the hierarchy (and Maya don't behave well with tons of shapeNodes). If I cycle over each fractured piece and shrink the outside UV shell, then the points don't overlap anymore and I end up with the right divisions, but I don't want to touch my original UVs Hope it makes sense, I attach some screenshot and a hip file. Thanks, D fractureTest_v001.hipnc
  12. Hello, I’m new to houdini, so I don’t know much. Is there a way to import particle fluid surface (water fluid displacement) into a displacement texture map? For example, oceanEvaluate node have "export to texture" tab and I can export displacement texture for FFT ocean. Is it possible to do the same for a particle surface mesh?
  13. Hey guys. Any idea how I could get render time displacement, based on values of points that I scattered on the surface? This is a simple scene of what I`m trying to achieve. Basically I have sourceprimnum and uv values on points and I just need to transfer those values to UV maps I think so I could use them in redshift to drive displacement. I tried using geomerty to bake displacement maps in COPs and it works, but original geometry is would have to be subdivided too many times and would get way too heavy for what I`m after. Any ideas how I can do that in render time? I`m gonna use Redshift, but that doesn`t really matter. Cheers Janis displacement2.hip
  14. Hi, I want to use a Mixamo character for a scene. I'm using v18 and when rendering, the render uv cuts/uv seams are visible! I tried in 17.5 and they don't! I want use v18 because the render result is much better. Is there any way to hide UV cuts on v18 render? Sorry for my english and I hope you can help me, thanks in advance. demon.fbx character.hipnc
  15. How to normalize a UV grid to square

    Hi guys! I need some help with uv unwrapping. Can someone explain to me how to normalize a UV grid to square: Thank you in advance! Best regard! hair.hipnc
  16. Hi all, I have been researching for this for days and so far haven't found a solution for this question. Maybe someone with more knowledge can point to the right direction. So, I have converted a 3D geo to a 2D version of it using the UV as reference through "@P = @UV". So far, so good. Now I need to perform some simple modeling procedures on the 2D geo like individual face extrusion, bevel etc and then bring the geo back to the original 3D version but with the modifications added. Would someone know how to bring the modified 2D mesh to its 3D format but keeping the mods performed while it was in 2D? Any suggestions would be appreciated. Thanks.
  17. Hi; To stick UVs to a melting geometry, I tried to transfer vertex UVs from the main geo to my scattered points, but there are some problems shown in the image bellow. How can I solve this? Thanks for helping. UV_Melting_01.hip
  18. Hi All, I'm having a problem here where I'm deforming some terrain geo using a vdb network. These are just like growing particle plants which create little mounds in the dirt as they birth. The terrain UV is jittering around as these seeds move through the vdb, reshaping the terrain. I've tried a rest position which would normally work. But i've not had experience using the rest with VDB transformation. I've attached a file and a redshift render. Thanks! ground_deformation_example.zip Particle_Growth_v3-Redshift_ROP1.mp4
  19. Can any uv, modelling experts have a look at my geometry in the attached and tell me if my Normals are 'ok'? The geometry is an inverted pyramid shape hollowed out. I should have a normal perpendicular to each face in my geometry which deosn't seem to be the case. I'f tried every setting on the Normal SOP and nothing seems to make a difference. Also, when do you know if you should be applying normals to vertices, points or primitives?
  20. GameDev Auto UV

    Any UV experts familiar with GameDev Auto UV? What are some good starting settings to try?
  21. Hi there, Im stuck on this problem im facing. I have created a material which basically shows the wetmap (collision history) of my flip fluid colliding with my static object. The issue I face is how to export this diffuse material as an animated image sequence in the correct uv space and unwrap of the static object model. i want to use this in maya as a shader. If anyone has any suggestions i would be thankfull forever :). Cheers.
  22. UVing curved grids

    i have this scene made of simple curved planes i want to uv. The desired result would be a perfect 1x1 square filling one uv tile for every surface and then moving to the next. i thought uv flatten would do the job but for some reason it doesnt work as expected even though its just curved surfaces almost flat,no weird curvatures. Any tips much appreciated! uv.bgeo uv.hip
  23. uv and closed spline

    I need to uv a circle sweeped around a closed curve, I've used the method of Indie PIxel with a group of point, but the result seems to be not correct, is there another way to generate uv with vex or uv texture for this case ? Thx closed uv.hipnc
  24. Hello everyone, is it possible to make stamped textures, mapped to geometry using UVs, visible in the viewport? Best Regards, Chrizzo stamped_tex_test.zip
  25. Hi Guys, I'm trying to replicate COP workflow from Simon Holmedal, in the video below about 29:00 he folding UV coordinate VOPCOP filter... I can't make it work... Any Idea? Thanks.
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