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Found 95 results

  1. Houdini Liquid Surface

    Hello! I would like to recreate the following effect: LiquidSurface.mp4.mp4 I want to apply an image texture (with normal, bump, roughness, ... maps) to a plane that deforms in the certain way that it does in the .mp4 that i attached as a file. Do you guys know the technique behind this?
  2. UV from vector file

    Hey. My idea is to create a uv in Illustrator and transfer same uv on geometry object. I try to solve it myself, but now i need your help/some idea. My problem is wrong rotation island on target uv model. I try sort points, primitives and my other idea didnt work. (ofc I dont want fix uv islands by hand) I cleaned my mad project for you and attached project files here (project, vector uv file and texture for experiments) Thanks for your answers. //add The main problem i think wrong sorting vertices i cant solve it. If you unlock "sort" node in my project you see primitives was sorted fine (i hope) I think new map will be more useful (testUV_02.jpg) //new HoudiniTestUV.hipnc testUV_01.ai
  3. Copy UVs to other faces

    Hello all! I have a series of blocks that I am projecting a texture onto. In my animation the image breaks apart into individual blocks like pixels. The issue I run into is how can I carry the texture on the front face of the geom onto the rest of the sides? To create the blocks for the anim, I am generating a bunch of points and adding noise the the positions. The block models are being copied to the points, converted, then UVs projected. Any guidance would be a huge help!
  4. Fairly new to Houdini and I feel like there must be a trick to this- how to get accurate UV's from Vellum's Post Process node for export into an Alembic. I create my UV's at the top of the Vellum chain before sim- let's say it's a grid object. The last step in the Vellum process is obviously the Post Process node where you can subdivide and extrude the object. This screws up the initial UVs as now there is way more geometry. Applying a UV texture after this doesn't work as it recalculates every frame. How can I make this work correctly?
  5. Hi, I'm trying to assign a material to some instances and I'd like for the opacity to be driven by a set the instanceObject uvs (uv) and the basecolor to be driven by the instanceTemplate uvs (uvgral). Is this possible? What I'm trying is to call uvgral in the material but it's not working. Overrides I do at SOP level don't work (naturally) and my attempt to make an override at object level was unsuccessful. Thanks!
  6. I've done the UV's, a simple box, flat. Repeated several times. How do I get UDIM tiles, with each segment (box) in a separate tile. Do I need to create any UDIM stuff before the UV layout?
  7. I want to export model with animation to maya but when I import in maya 2018 UV is gone. I try to promote UV to point before export it can see UV in maya but UV is wrong. I want to know how to export alembic with uv, Thank.
  8. Open UV View (Uv Editor ) in Python

    Hello , I'm looking for a way in python to open UV View (UV Editor) in a separate window , any help .
  9. I understood from a tutorial that UV Flatten comes before polybevel and subdivide. It kind of keeps the UVs. But I noticed when I switched on the "UV distortion" in the viewport that when I add the subdivide after the UV flatten, there are distortions in the edges. Do you use UV flatten before or after subdivide and polybevel?
  10. I've created a subnet that sets up the UVs for texturing and it works correctly, until I apply a Voronoi fracture node, after that the texture no longer aligns properly. I've attached my scene file. Thanks a lot! ImageBased_Destruction_Cobble_Test_003 .hip
  11. How do I display the UV island in different colours AFTER having finished all the UV work: UV flatten, UV Layout and UV Quickshade. I'm texturing and I notice nasty stretching in Substance Painter, I need to go back to the UVs view in Houdini to identify which island is causing the problem.
  12. 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
  13. 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
  14. 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
  15. 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.
  16. fit UV into 0-1

    hey! is there a simple way to fit the UV into the 0-1 space? cheers!
  17. 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.
  18. 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?
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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?
  24. 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
  25. 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!
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