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Found 240 results

  1. I am considering buying a dated computer but am uncertain if it is worth it. I plan to use it strictly for rendering using deadline and use my main computer for all of simulations. it uses an amd fx8300 cpu and ddr3 ram 1866. i am unsure if it will be running very slow because of its age and the old architecture it runs on. Might even not be able to run modern OS's. Hoping someone here might be able to offer some insight.
  2. Hi, how can I use the same node between different shading networks. In Maya every node exists on the same level so I can connect it to the multple shaders or as a mask. Coppying node between Material builder or building shaders in one MAT context, is not useful. And whether coppying it uses more RAM or processing power? Global MAT context Separate Material builders
  3. Hello, i'm trying to render a scene with karma but i get an error message when I start rendering which looks like: this: "<b style='color: red;'>Property 'vblur' cannot be specified on a per-instance at this time. Please set the property on the prototype instead.</b>" I tried to turn off motion blur, depth of field, swithed between XPU and CPU engine and I still get the error. I couldn't find anything on internet talking about this problem so I hope you guys can help me. Thanks for reading!
  4. Hey everyone, basically what I have is this: and what I want is this: Obviously, it looks like I could just move the pig head up in space haha. But I have a more specific case that requires the pig head to be visible through the plane giving the ILLUSION that it's on top of it. Put simply, I want the pig head to always be drawn/rendered on top of the plane, regardless of depth/occlusion. It's really easy to achieve this with compositing, but I'm hoping to pull this off at render time using materials in Mantra. I'm open to some complicated node setups (maybe turning the plane transparent wherever the pig head is behind it???) But hopefully it's just an easy setting that I've missed. Thanks so much in advance!
  5. FFF: Subject 071, Teaser

    Thrilled to show a teaser of my future Houdini tutorial. Key topics: - Proceduralism: geometry and animation - Pyro: explosion with love - Karma XPU: pain and joy *99.9% done with Karma XPU Release on gumroad soon.
  6. I am new to Redshift. For a very basic scene with three objects, at a resolution of 1280x720, it took 13 minutes to render. I have intel core-i7-8750H, Nvidia GTX1050ti -4GB and 16GB of RAM. This is the output. I have rendered more complex scenes in Keyshot at a resolution of 1350x1350 and it takes 6 minutes max for them on my machine. Please suggest a solution. Here's the houdini file. REDSHIFT ISSUE.hip
  7. mantra: Could not obtain vex

    Hey I am having a problem while rendering my Ocean Surface. Mantra is not displaying anything in the render view. I can see "mantra: Could not obtain vex from op:_auto_/mat/oceansurface " Any Idea what can be the reason of it, It is keep failing the render!!
  8. Hi everyone, I'm currently working on a material who mixes 2 shaders and I'm facing a stange issue. How to layering 2 shaders using a map in houdini ? I tried using the layermix and it works but only using a noise as alpha (pluged in alpha) But when i'm trying to use a map there is only the shader 2 who is render the map I want to use is a .pic sequence has alpha and using as mask for wetmap. Does anyone know the right way to use a map as mask for shaders ? maybe I'm not using the layermix correcltly or maybe using a texture node plugged in alpha is not the good way to do it..I don't know. There is not much information about the layermix in Houdini Help... Thans for your help !
  9. Hi there, I have gone through the forum and I could not find a solution to this problem, so please forgive me if it exists. The sad part is I totally figured this out months ago through trial and error and never saved the file somewhere that I could revisit it apparently ( silly me ! ). So I have made some flat tapered grids that represent disco lights ( light cones but flat ) and have coloured and animated them rotating with sin() and added a camera. Because this is for a 2D style project, there is no shading or lights required. The shader is literally just the Cd attribute plugged into emission with random colours per prim. What I would like to do is use COPS to render my scene as it's way faster to do this for something that has no real lighting. I just cannot figure out how to get : 1) the same view as the camera, but in cops 2) the colour information to show up. It's always cops that trips me up. lol. Any help is greatly appreciated.
  10. I am trying to render out a simple wireframe with depth i.e. the wireframe object fades into the background. Ideally, I want to control the fading threshold in compositing software but I don't have Nuke which is what most tutorials out there are using. Relatively new to render passes, wrote Z depth output into EXR but it is recorded in world units I believe so I find it hard controlling it. I tried using a COP network but can't seem to make it work/don't know how to remap Z depth mask. Any advice on that? Attached file. On a higher level, what is a good option to use for editing multilayer EXR sequences? I typically use Premiere for simple editing but there aren't many EXR tutorials for it? After Effects seems convoluted. Is Nuke my only good option? z-depth-test.hipnc
  11. Hello I am working on a Ocean scene with a flip tank integration. Now I have rendered out the ocean with the flip tank simulation. And now I want to render the white water. But a few frames after the white water simulation started rendering, the rendering process just keeps crashing, and I dont know how to fix it. Or I do something wrong? Should I cache out the white water first and then hit render or how? And how I can create render passes of the white water, so I just can overlay the different render layers in a compositing software on each other and I dont need to mask it out somehow... Help would be much appreciated!! also, I have used the pop advect by volumes node and the bounding box is cutting away some of the white water, how can I fix this too???? Thanks!
  12. Hi guys, I have a tricky question about the Houdini FX vs Core licences. I do understand the differences between the two licences, but on the Side FX website, there is a mention that isn't clear: "Houdini Core is ideal for modelers, lighters, character riggers and animators to use on its own or as a layout and lighting tool for visual effects created in Houdini FX." Does that mean that I can buy a Core and a FX and render a FX scene on a Core licence ? Does the Core version understand the FX scene, load it, and render it without the possibility to edit of course the content ? Any clarification on the subject of what can render a Core version from a FX scene would be great, because it's not the same price...I do need to optimize the cost and i need to know if my core license can render a FX scene without changing the setup. Thank you.
  13. Free video tutorial can be watched at any of these websites: Fendra Fx Vimeo Side Fx Project file can be purchased at Gumroad here: https://gumroad.com/davidtorno?sort=newest
  14. Hello there, I have a few problems here: I am trying to make a unlimited ocean scene which I have done without any problems. But now, on the ocean horizon, the water is white for some reason, and I just don't know why it is white, a bug, or I'm just doing something wrong. I tried to make all the bakes in one folder, but it somehow helped, but somehow it did not. I tried to change the parameters in the ocean spectrum, and then bake it again, it helped for some time and then the water was still white. If someone have time, you can take a look on my scene file and the screenshot with the problem. and also, when I try to make a flipbook render, then the flipbook is just rendering the first frame and after that it stops and when I try to render the scene with mantra, then mantra isn't rendering at all... here is a screenshot of the ocean problem and the hip-file: https://drive.google.com/drive/folders/19F8rb7mvUHI_7TNgVI9TzrNU4nlvWcSu?usp=sharing I would really appreciate the help if someone could figure out why it isnt rendering with flipbook and mantra and also the ocean problem.
  15. Redshift IOR Glass issue

    I was hoping somebody could help me with a render of a glass bottle filled with fluid. I am using the RS_Material node with the stock glass preset. I'm attempting to get the refraction of the fluid to function as it would in real life where the liquid appears to go right to the edge of the glass. None of the IOR settings get me there, unfortunately. My model is double sided and the normals are correctly pointing outward on the outside and inward on the inside. The fluid is slightly backed off of the interior surface so we're not penetrating. No matter what I do I can't get the refraction to bend "out", but it will bend "in" no problem. I have a few images attached that show what the different settings are. As you can see, an IOR below 1 ( IOR_0.85.jpg ) correctly pulls the liquid inward as you would expect. An IOR of 1.0 causes the glass to disappear altogether. Nothing I do above 1.51 gets the opposite effect, so you're always seeing the glass thickness represented as a big transparent border. Any advice would be appreciated. Thank you.
  16. Hi everybody ! I’m working on a massive destruction scene (collapsing of 4 buildings with lots of windows) which have finally more than 200k packed fragments… You can see a preview here (the 3td test) : https://www.linkedin.com/posts/lionelalvergnas_bonjour-tous-le-monde-tout-dabord-merci-activity-6789944472420585473-s7mI I’m in trouble with “Object loading” time of Redshift (v3.0.44), with a render time of 7m30 almost 90% of this time is used to load the objects ! How can I speed up this (so long…) time? I’ve already tested the RS proxy, but finally I’ve the same render time with a 2Gb file for just one frame, and I’ve 450 frames… For now, I’ll use Mantra which take “only” 4min per frame, but I would prefer use Redshift because of my RTX3090 ! If you’ve any suggestion, I’ll be happy to read that! Thanks in advance Bye
  17. Hello. I tried to render the color ramp I made in Vop with RedShift, but it doesn't work.The red attribute vop in the attached hip is the one. I'm still a beginner in Houdini and don't know much about RedShift render, but I was wondering if you could help me. Apply ramp color.hiplc
  18. I would like to have light 1 from frame 1 to 10 and light 2 starts at frame 11 for example. Cheers
  19. Rendering cloth on both sides

    Hi guys. I have a quastion 1) how to render cloth on both side? Do i need to use something like polyextrude? 2) Im rendering cloth on extremely high angles of the normals and thats why cloth become white. How to fix this?
  20. Hello all, I am having troubles with the way colours look between the color editor, the render preview, and the output. There is something I should know that I don't know yet. I heard about linear workflow but if I could have your tips on this, that would be great. First in the colour picker when I choose a color for a material (I am using Redshift, but I saw the same issue in Mantra), the color in the little square doesn't match the color I am sampling from an image. How should I set up this color picker: Linear/Raw/sRGB ?? Then that color taken with the colour picker doesn't look similar in the renderview. How should I set Redshift renderview ( Linear/Raw/sRGB/OCIO) ?? And in the Redshift ROP, is there something I should be aware of, something to tick? Are you using the settings in the render preview of RS, as far as I can tell, you can only render a frame from here, not the sequence. I have been looking online but most tutorials I saw don't talk much about this. I read that having everything linear is best apparently, as it works better for post editing, but when I set my color picker to Linear, my RS preview to linear, when I output my EXR, it looks dull (it looks like the sRGB of the RS renderview) Voila, any tips about your personal workflow for this would be amazing and if you know about a tutorial about this, please share Thank you very much
  21. Hello guys, I made a quick example to illustrate my issue. I figured out how to bring the colour values of the different vellum stresses out of the solver, so I can use them in rendering (in my example I am talking about the stretchdistance) I use the attribute transfer and then try to remap the colour range. Vellum uses this purple to red range and I am just trying to remap it with the point vop to a different range but it doesn't seem right. The gradient is different. The blend between colours seems a lot harsher after the PointVop. Attached some screenshots to illustrate my point. I put the hip file in case. Any clues? Thanks test_color_att.hip
  22. Karma Noob Issues

    Hello all, I’m returning to Houdini after stepping away for a bit, and figured I’d brush up a little by giving the Karma renderer a spin. While the general workflow appears to one-up the ancient Mantra, I keep running into the same dumb wall, despite going through basic tutorials by three different artists (per this LesterBanks page: https://lesterbanks.com/2019/11/all-about-karma-and-lops-in-houdini-18/) While everything else seems very straightforward (though still possibly buggy) the thing I can’t seem to get to is any kind of final rendered bitmap that is not just a field of black pixels. I’ve tried rendering through every file-type option (.exr, .tif, .pic, etc) and through every render buffer (tried MPlay, Render to Disk, Render to Disk in Background, etc.) but I am only getting black images, no matter which tutorial I’ve followed. Here’s a link to my project structure: https://www.dropbox.com/s/0edzqf0ivr24scx/KarmaKitchen.zip?dl=0 I took to monitoring CPU / GPU activity: While Karma IPR is running, CPU / GPU activity is ~90%+ / ~15%. For “straight to disk” rendering, CPU doesn’t go above 3%, though Houdini’s Scheduler / Render Manager verifies that the computer is actively rendering. I’m not sure if this will give any clues, but here’s a snapshot of the RM during render. https://www.dropbox.com/s/em4bnzcm4rtnd0i/RenderManager.JPG?dl=0 Otherwise, I’m running Houdini’s Indie license, though as far as I’ve been able to research, Karma is compatible with the Indie license. Am I wrong about this? Also, as a general question, is there a hugely significant speed advantage to Mantra? Seems like it might be wiser to hold-off on Karma until it’s out of beta stage. Any thoughts on that thought? Preemptive thanks to any responders! NpF
  23. I would like to take this value out so I can create a colour gradient out of it and use it in my texture thereafter. I know how to do it with the stress attribute as it appears in the constraints attributes, but I do not have a Bend angle attribute in my solver. Cheers!
  24. I would like to take this value out so I can create a colour gradient out of it and use it in my texture thereafter. I know how to do it with the stress attribute as it appears in the constraints attributes, but I do not have a Bend angle attribute in my solver. Cheers!
  25. Hello, This is more of a question of curiosity at the moment. Although compositing is usually done after rendering multiple passes, how would one go about if one wanted to composite more procedurally at render time, using shaders? Sort of bringing the compositing phase into the SOP/MAT context. I do not mean grabbing a pre-existing image from disc or creating something procedurally and then combining them in a shader with layering or the Composite VOP, I mean making the same calculations, but on the pixels that would be rendered if the object weren't there, something like transmission and ray-bending calculations on glass like surfaces. Basically I'm talking about getting "what would be rendered if the object weren't there" information into the shading context as a possible layer to be made calculations on, blended with, etc. Would there be a specific VOP, something I haven't encountered yet? This could provide some interesting possibilities, I think, for example the option of controlling blending modes at SOP context with attributes more intuitively without having to promote some attributes to shaders, render them as separate passes, and then try to do procedural operations on them in COPs or some compositing application. A more specific example would be a lot of grids, pointed towards the camera, moving around in world or object space, and having materials applied to them that dictate, based on geometry attributes, weather whatever is used as their surface color or texture, would be "overlayed" over everything in the 3D space behind it, added to it, multiplied, used in a difference or subtract calculation, or something else. I hope I communicated clearly enough. Anyone tackled this?
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