Jump to content

Search the Community

Showing results for tags 'uv'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • General
    • Lounge/General chat
    • Education
    • Jobs
  • Houdini
    • General Houdini Questions
    • Effects
    • Modeling
    • Animation & Rigging
    • Lighting & Rendering
    • Compositing
    • Games
    • Tools (HDA's etc.)
  • Coders Corner
    • HDK : Houdini Development Kit
    • Scripting
    • Shaders
  • Art and Challenges
    • Finished Work
    • Work in Progress
    • VFX Challenge
    • Effects Challenge Archive
  • Systems and Other Applications
    • Other 3d Packages
    • Operating Systems
    • Hardware
    • Pipeline
  • od|force
    • Feedback, Suggestions, Bugs

Found 84 results

  1. Hello! I'm trying to control frequency of Cellular noise with distance from the middle of the UV map. There is some weird distortion on the noise, and I'm quite sure now my whole approach to this is wrong. Any ideas how this could be achieved? Thanks in advance cell_noise_freq_by_rad.hiplc
  2. Hey guys, Any idea on how can I apply an image sequence on multiple objects? I have this set of grids and a sequence of textures to apply on it but it can't be randomly. My first thought is through stylesheets (like on crowds) but i'm not sure if this is the best approach. (the original setup doesn't have a copysop though, so I can't use stamps) this is the jpg sequence i have: Scene file is a attached Thx RnD_Texture.Sequence_v100.rar
  3. Hi all I am trying to figure out how to do transfer of uvs (with correct seams) from low poly geometry to hi. Example workflow (works for me in Maya) and to the point I’m stuck in Houdini. Take hi res 3D scan > do poly reduce (gets low poly) > do auto uv > transfer UV to high poly. now this for me works all the way to attribute transfer (vertex uv) but uv edges (seams) are not transferred. I tried transferring uv_seams edge group (and it works to some point) but just can’t get those clean UV islands as in low poly. I must be missing something simple but I can’t figure it out. thanks for help
  4. Hello, I'm trying to figure out this thing about UVs and polygons from vdb in Houdini and so far so good except for the new and nasty UV seams that are created after the transfer is done through attribute from volume. Maybe someone can shed a light on this, it would be much appreciated. So, i created a simple scene with the pig head, converted it to vdb (from polygons) and then back to polygons. My intention is to transfer the UVs from the original head to the converted polygons from vdb, just for studying purposes. I used the attribute from volume node and it worked almost great, the UVs are transferred nicely but with nasty distorted seams. Even though the UV seams get lost in the vdb conversion, the approximation performed by the attribute from volume node is quite good but i cannot imagine a solution to solve the distortion on the seams, at least through this approach. The attached images show the comparison between the original UVs and the transferred UVs to the converted polys from vdb. Any idea about how to clean the erratic distortion on the seams? Or, is it even possible to do such thing? Thanks.
  5. fit UV into 0-1

    hey! is there a simple way to fit the UV into the 0-1 space? cheers!
  6. Workflow for creating terrain I am trying to create a realistic mountain terrain, but I can't find many resources on it. There is Alex Dracott's "Generating HeightField Terrain Textures" and "GDC 2017 - Houdini 16 Terrain Tools" but it leaves me with some questions that you guys maybe have the answer to. When I look at Alex Dracott, and other artists terrains, it looks like the vertical side of the mountains is texturered very nice, but how is this possible? The vertical sides of a hightfield will always have very low resolution, because the UV's a projected down on the surface in the Y direction. One though I had, was to create the UV's based on the quads that make up the heightfield, but this will involve some kind of remeshing, because the mesh also are scaled (Stretched). Extreme example of UV stretching <stretched_uvs.PNG> Another thing is the texturing. In Alex Dracott's video, he uses cop to create colored noise from masks and applies them back as textures, but what is the practice for texturing a big terrain with textures/materials? I have been playing around with substance painter, and projection, to "draw" materials, is there another way? Is it normal to export the heightfield mask and generate materials in a more procedural way via substance designer, for these big areas, or it more common to create the material from scratch without any masks in something like substance designer? And last, is it normal to create some kind of LOD system for such a project, or using UDIMS, to get the details we want when getting near curtain areas of the terrain? Maybe I am lost, and not even near what a real world workflow looks like, but I am sure that someone on the forum has experience with this.
  7. Simply trying to UV map a hemisphere. Using a UVTexture SOP with Polar projection. Doesn't seem right to me. Is there a best practice when UV mapping sphere that also avoids seams?
  8. Hey guys. Is there any way to sync selections between multiple viewports such as perspective view and UV view so I can see my selections in multiple places? Here's how modo (and any other normal 3D software) shows selections: And here is Houdini which treats different viewport independently which I'm sure has some logical explanation but when I do UVs I'd like to see my selections vica-versa in all the viewports. Is there any way to do what modo does folks? Please help me! I don't want to abandon Houdini and roundtrip to another app to create and modify my UVs. Thanks in advance! Kristof
  9. Htoa Hair Problem

    Hi, I made Hairs in Houdini 16.0.557, I made a Hair Standard (Arnold) material where I used Ramp in "V" for color along hair strand. It works in Htoa 2.0.0 (Arnold 5.0.0.1) , unfortunately I have to render this on farm with Htoa 2.0.1 (Arnold 5.0.0.2) and this is not working anymore, it looks like it taking the source geo for hair and colouring whole hairs. (I have kind of strips on these hair strands) - not any more on Htoa 2.0.1 Any Help? Or some workaround? Thanks. B
  10. Hey all, I'm trying to set something up here that does some automatic UV placement for UDIM based texturing. What I'm having trouble with is setting it up so that every tenth iteration adds 1 to the value of the translate Y in a uvtransform node. I've got it working to loop through and translate it in X each time, but I need it to move up in Y by one, but all the way back to 0 in X after each tenth iteration. I hope that makes sense, here's a file so you can see what I've got working also. I'm just not good enough with the syntax and expressions yet to make it work quite right. AUTO_UDIM.hipnc
  11. search and check for UV's in scene

    Hi, I have large scene with alot of geometry wher some have UV's and some who doesnt. I imported the whole scene as one obj file so it thinks it has UV's. I know there is a way to determine if it has to uv's I saw in the simple baker that it has a switch that unwraps the model if it doesnt have any: haspointattrib(0, "uv")||hasvertexattrib(0, "uv") But this doesnt work. because it has a attribute uv, which is empty on some object. Is there another way to look for objects that doesnt have uv's? or where the uv attr views none uv's? thnx
  12. handles in uv-viewport

    Hi I'm trying to create a boundingbox handle in my hda much like the boundingbox handle in the new uvlayout SOP. And exactly like in the uvlayout sop I want to modify it in the uv viewport. I did a simple rightclick and "export handle to digital asset" and it creates the handle but only in 3d viewport. so my question is if there's a easy way to tell the handle in what viewport it should operate?
  13. UV Flatten node bugged?

    Hey guys. I need someone to take a look at my scene and tell me why it keeps crashing using the UV Flatten node. I have in the file a working example, and then a non-working one. there is only a few operations in difference between the to uv flatten setups, however one of them is not working. Any help, or confirmation that this is in fact a bug and not just me overlooking something, is appreciated. Cheers Hershey_mod_v0010_workinguvs_jra_.hiplc
  14. 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!
  15. Attrib From Map: Color too Dark error

    Hi, Hope someone can help: Screenshot Left: using "attrib from map", the color is too dark. Screenshot Right: using "UVquickshade", color is ok. How can I get the result on the right using attrib from Map? Thanks in advance for info! Mark
  16. VDB smoke uv mapping

    Hi guys I'm trying out some stuff for my upcoming project and was wondering how to make uvs for smoke converted to poligons, so that they would remain stable rather than jumping around every frame. I found some info on using dual rest position, however I'm not sure how to tackle it, or if it could work with this approach. Here is what I have right now ( I'm not sure if you can see that, but there are scratches on the surface of the smoke which as expected change where they are every frame, the question is how to make them remain in place even tho the number of points is changing and whole thing is deforming) Here is the type of effect I'd like to achieve: Any tips are very much appreciated!
  17. normalize uv??

    I am trying to normalize uv, I could do no procedural way, I think I need to get max and min uv position but I don't know how, If anybody knows how or have good idea! please help me! thank you!
  18. I've laid out UV's procedurally in Houdini with the sweep or skin sop and using arclen on the input curves, but I'm wondering if there is a solution to straighten/unwrap geometry that is generated in ways other that using a sweep or skin SOP. If anyone is familiar with the Unfold Strip from Loop button in 3dsMax's Unwrap UV modifier it basically takes any edge or loop input and straightens out the geometry into a strip. It's super useful for cylinders and chamfered/extruded edges. I'm wondering if there is a workflow to do something similar in Houdini. I tried messing with the new FlattenUV node and I can get something kind of close with the enable loop straightening, but the UV's are still wobbly and not perfectly straight.
  19. rbd sim lost uvs

    hey all! I'm importing an obj with uvs into houdini, shatter it and sim a rbd bullet dynamic. I've noticed that after the assemble node created by the shelf tool uvs are gone. now I'm trying to cache out an alembic but once imported outside of houdini I can 't get uvs back...any idea why? cheers
  20. UV's on grain sims

    Hey! I have a shot of a flower pushing up dirt and growing. I used the sandbox grain preset with my ground geometry. I am trying to figure out the best way to create uv's, because I need to texture the dirt. I converted my particles to vdb then to geometry. I noticed that after the grain source was created it also dropped a rest node. How can I utilize that rest node later on? I know i need to use it to keep the texture in place, because the mesh will be deforming. I have attached a scene mimicking my actual scene. Any help would be appreciated. Thanks dirt_uv.hipnc
  21. Hi, apologies if this has been asked before but I couldn't find an answer. I've done a crowd simulation in Houdini but now need to export to alembic so I can bring it into C4D as a necessity due to my company's pipeline. I've unpacked the agent primitives and had to run through a polyreduce node to create a sensible alembic, but I've lost all the UVs along the way. I'm pretty new to Houdini, please could I have some guidance on how I can export the alembic with the original UVs please? Many thanks!
  22. Hi, I can get arclen of the curve by UVs using primarclen() Can i do opposite thing ?
  23. Hi, I was wondering how one would go about laying out UVs based on the selected shells' world orientation. Lets say I have an arbitrary boxy shape with chamfered edges. I would like to be able to box map the selected polys, stitch the shells together and then have all shells organized in the same orientation basically. So regardless of them being aligned in world X Y or Z they need to end up in the same orientation in the UVs if that makes sense? I attached a mockup from 3dsmax Any ideas? Thanks!
  24. Hi, In building a terrain, I used Entagma's tutorial on live rendering of Heightfields in Houdini using Redshift: The issue I'm running into is that my UV's are now super stretched on the terrain from using displacement on a grid. My terrain is huge, like 8,600 units across square. If I convert to polygons, it's pretty heavy. I'm trying to figure out the best workflow that will allow me to have the detail I need, but not be so polygon heavy. Would exporting out some lower resolution geo for rendering along with a baked displacement map be a good option? I need to be able to somehow edit the UVs as well so they are not stretched on my terrain texture. Any help would be appreciated. Jim
  25. convert curve to edge selection

    Good evening to the best forum in the world. got a little problem I need an extra pair of eyes on.. I have some geo I would like to lay out UVs for. I have used the shortestpath node to create curves of where I would like my seems to be created. now my question is, how do I proceed? I am not really familiar with the uv tools in houdini. I think I would want to convert my curves into edge selections on my mesh (which I am not sure how to do), and then from there use somekind of uv node specifying my edge selection groups as seems to flatten it out. any ideas? Cheers
×