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Found 133 results

  1. REDSHIFT AOV EMPTY

    if I render with redshift my aov are always empty, whether zdepth, gi, diffuse raw....
  2. MultiColored Material

    Hi, Would anyone know good tutorial on how to make multicolored materials like this? It tried it with color mixer note and cell noice pattern , but i doesnt give me a good result , also is there a way to expand the color mixer note to use more than 2 colors? Thanks
  3. Hello! I'm trying to render a flip simulation and I'm getting a lot of flickering. They're all caused by my direct lighting, but decreasing the intensity still doesn't fix it. I've tried to change the sample rate and the rendering limits but I can't find a problem to fix the issue (noise is not a problem but the white reflections). I attached an image with the result. Thank you in advance!
  4. when rendering doesn't work

    To : all my friends in this planet When rendering, 'Houdini console'window only appears on render view and doesn't work. Can't figure this out by myself.. Hip file attached. Please help.. portfolio_v01(2).hip
  5. Hello guys, Well i am working on an ocean scene having foam particles over it, I need to render the scene but everytime i put the scene on render it starts using 100% CPU Usage and crashes. Plz tell me how to down sample my render i have 200 frames and not one is getting render. All the render settings are on default and rendering via physically based rendering. PC Configuration- I7 6700 PROCESSOR AMD 2 GB RADEON R7 DDR5 GRAPHIC CARD 16 GB RAM
  6. Hello guys, I wanna make an ocean with an ice berg floating over it, I already added environment light, And checked all the diffusion values needed for it but still getting such 2D type of look in my render view i donno what to do now Here is screenshot of my file-
  7. electric shader

    Hi guys, Do you know when i make this kind of electric effect what kind of material should i use? just basic principled shader or anything else? Thanks.
  8. Hi!! I'm a VFX student new to Houdini and i'm having some problems to render a "stone" shader because some of the stones in my displacement show some kind of glitch / flicker. I'm rendering in mantra in a 3-5 samples setup, I've tried to put normal node and it make the same error. My shading setup for the displacement is "Zbrush displacement map + 2 stone textures with some fits + uv noise + uvxform, all of this connected to color mix that goes to displacement" my zbrush displacement is 8k resolution in tiff. Dragons_FlickerGlitch_h264_ivanp.mov
  9. RenderFarm

    HI, any suggestion for houdini mantra online render farm ? i have contacted grid Market. any other ?
  10. matte and phantom?

    Hi guys, I have a simple question. I can't understand when i want to get render in mantra forced matte and forced phantom options. i get render separate every time for example if have destruction scene and if i want to get render that rbd, dust, debris, smoke etc. Do i need to put something forced matte and forced phantom in mantra settings? are they so important? thanks...
  11. HI , I was rendering Ocean using Ocean spectrum and surface, nothing advanced , but I'm getting this weird issue. When I render out in 540p, everything is as it should be but when I render it out in 720p, some parts of it is missing and when I render it out in 1080p, even more parts are missing. So i decided to change the camera angle just for testing, and there it is, everything is perfect, no cutting the edge or anything been noticed, even in FUll HD. I have attached all 4. (in the top view render you can notice the shape of my Ocean, Actually Those are only area i want to render, so ignore the shape ). Please Help me out.
  12. Hi everyone! Just a quick question out of interest. Speaking very generally, fluids usually take longer to compute/sim/render than other types of sim(e.g. rdb). Just wondering why from a technical point of view? Is it anything to do with equations used to compute it? or i guess more particles stuff in the scene? I've just seen how vague and ridiculous this question might sound but any info on this would be really interesting! Thanks in advance!
  13. Hi, I'm searching for a way to create a pointcloud from rendered geometry. More or less it was possible with prman where I was able to save point positions with rendered color information during rendering (or in a pre render pass). Same procedure worked in more ore less in mentalray. Can I do it in mantra as well? The result should be a camera independent point clouds with rgb and position data.
  14. Hello! So I'm not sure if I should be posting this in a Maya forum, but I'm having issues with constrained objects in Houdini. The object was rigged in Maya and then exported to be rendered in Houdini, but when brought into Houdini, on certain frames the parent constraints freak out and cause a weird effect ( show in the picture ) I've narrowed it down to the objects that are being parented. I've tried to delete the constraint and just parenting under the geo, still no luck. Has anyone else ever encountered this? If so what did you do to fix it? Thanks
  15. Hello node friends ! I have a problem in hands here. Basically I'm doing a stadium crowd sim. So far so good. I'm then doing the shading over on the material style sheet and rendering with mantra. I also have a cloth sim with the same proprieties over on that style sheet. The problem I have here is the following: I can render the flags over on the farm with the IFD generation, I've included the SHOPs on the mantra ROP. That part is solved. When it comes to rendering the Crowd, it just renders black. I've tried caching out the results, using procedural geometries and the procedural agent SHOP but it still renders black. I can render it just fine on my machine, when it comes to the IFD rendering part, the machines can't render it. Notice that I have all the agent caches and maps over on a shared network drive that it can access, otherwise the cloth wouldn't be able to render it either. Any ideas?
  16. How to get smoothed UVs at seams in new Subdivide SOP? It was possible in Houdini 16.0...
  17. How can I render animated trail like these from my simulation? Be able to add material to these and do other stuff too if possible. Thank you so much for your help. I succeeded to see these trails in my Dop Import but it shows nothing in renderer (example pic from internet) http://www.sidefx.com/docs/houdini/images/visualizers/volume_trails.png Thank you so so much
  18. Flipbook every other Frame??

    Hello, I was wondering if anyone knew how to flipbook every other frame or every three/four/five frames etc? And if this isn't possible which I'm not sure if it is, how would you go about doing this with a render too? [ without manually flipbooking or rendering every other frame etc. ]
  19. I'm trying to provide an option to render to background so my artists can continue working on their shots Houdini. Currently in my OTL I am calling hou.hipFile.save() then proceed to trigger the render in background option in my mantra rop. hou.node(node.path()+'/render/render').parm('executebackground').pressButton() Despite saving the file, when the render executes, I receive an error telling me to save the file. Is there a better way to approach this?
  20. Hello, I have encountered strange difference in render outputs from different computers and I have hard time figuring out what might cause this to happen. I have created scene on my laptop and then tried to render it on workstation. Both computers have the same Houdini version installed (16.0.736) but they produce different results when rendering. I am attaching both renders - first one rendered on laptop and second on workstation. On second picture, there is strange noise and highlight around area in the middle (exactly where the point light is located inside cloud). I was rendering the same scene and I expected the result to be the same as on my laptop. The main difference is that my laptop is running on Linux while workstation is running on Windows. Also there are different CPUs in these two computers (laptop - xeon; workstation - i7), but I guess that should not make any difference. Please, does anyone know what might cause this difference in renders? Thank you very much. Best regards Trandzik cloud_test_01.mantra1.0001.exr cloud_test_01.mantra2.0001.exr cloud_test_01.hiplc
  21. Hey, When you use the render button in the toolbox, then click view:Mantra, what render node is it using? It definitely isn't using my render node. It renders from the perspective view as expected but its at some weird resolution and not my render node's settings. It renders at 640 x 465, lol. What node is it using and how do i edit it?
  22. Render Wrangler needed - TRIXTER Munich

    TRIXTER is currently looking for a Render Wrangler. Description: The After Hours Render Wrangler & IT Support position is a part-time but mission critical role to offer both after hours IT support and assist in the effective use of the computing resources (renderfarm) utilized in rendering computer generated images for our active projects. To start as soon as possible. Long-term contract. Primary Responsibilities: - Monitor, manage and keep the renderfarm running at maximum capacity - Monitor jobs on the “Pixar Tractor” render manager: identify stalling jobs, follow up and report failed jobs to artists/Production. - Check and re-start failed render tasks. - Update and maintain Render Manager job priorities according to instructions from Production. - Monitor disk space usage and flag high disk or network usage over-night. - Restart unreliable blades and report them to the IT as necessary for later diagnosis. - Provide first level technical support to artists and production team members working after - Provide additional information to, and where required, liaise with the IT team to assist in trouble-shooting larger technical issues. Required Skills & Experience: - A focus in Computer Science/Engineering as an undergraduate is a major plus. - Experience with Linux/UNIX, in particular the shell environment and navigating through the file system is a requirement. - Experience and/or interests in any of thefollowing IT technologies is a benefit: ZFS, Layer 2 Networking, esxi, vsphere, pfsense, RHEL, iSCSI, git, rpm, Bacula, NFS, SMB, python, Asterisk, Ansible, Graphite, Nagios, Observium, Cacti, Solaris, bash, csh. - Excellent communication skills, both verbal and written - Good organizational skills and attention to detail - Ability to handle a fast paced, occasionally high pressure environment - Ability to work well both independently and as part of a team - Willingness to work very flexible hours, including weekends and/or evenings. Please send your CV and your earliest commencement date by email to Laila.sleiman@trixter.de and/or jobs@trixter.de We are very much looking forward to meeting you! www.trixter.de
  23. Render depth layer but force matte object in the depth layer.
  24. Render ROPs in background

    Hello! I have a question concerning ROPs, because I can't seem to figure out how to render them "in the background" as you can do with other write-to-disk SOP-nodes or Mantra-render-nodes. I really like this options as it gives me the ability to still work in the same scene without having to open another window. My particular case is that I have a flip sim and want to render two caches out at the same time (one fluid cache, one surface), frame-by-frame dependent on each other. If, as I expect, you say that there is no way to do this, because of the dependencies, then I'm fine with that. I just wanted to ask if I missed some usual Houdini-black-magic. Thanks!
  25. Hello friends, I was using Arnold for a long time while also playing with Mantra, but until now I never really had a time to dive deep to Mantra. The thing I really adore about Arnold is that in its settings it has this beatiful "Samples calculator". It seems just like a small detail but in my personal experience it was a great help for optimizing heavy renders. So few weeks ago I decided that I would try to create some similar calculator for Mantra. At first I implemented it by Arnold example which works like this (I'm not 100% sure with the equations but in my tests they work ): Camera (AA) Samples = pow(Camera (AA) samples parameter, 2) Diffuse Samples (Min) = pow(Camera (AA) samples parameter, 2) * pow(Diffuse samples parameter, 2) Diffuse Samples (Max) = pow(Camera (AA) samples parameter, 2) * pow(Diffuse samples parameter, 2) + (Diffuse depth parameter - 1) * pow(Camera (AA) samples parameter, 2) Specular Samples (Min) = pow(Camera (AA) samples parameter, 2) * pow(Specular samples parameter, 2) Specular Samples (Max) = pow(Camera (AA) samples parameter, 2) * pow(Specular samples parameter, 2) + (Specular depth parameter - 1) * pow(Camera (AA) samples parameter, 2) Transmission Samples (Min) = pow(Camera (AA) samples parameter, 2) * pow(Transmission samples parameter, 2) Transmission Samples (Max) = pow(Camera (AA) samples parameter, 2) * pow(Transmission samples parameter, 2) + (Transmission depth parameter - 1) * pow(Camera (AA) samples parameter, 2) Total (No lights) Samples (Min) = Sum of all min samples above Total (No lights) Samples (Max) = Sum of all max samples above But soon I realized that Mantra does not work this way. (Well yes, it was silly to think it works the same way ). So after reading a lot about how sampling works in Mantra and talking to my friends I came up with this calculator: ray_count_calculator.hdanc Which counts ray count like this: Camera Samples (Min) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) Camera Samples (Max) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) Diffuse Samples (Min) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) * Diffuse samples parameter * Global multiplier parameter * Min ray samples parameter Diffuse Samples (Max) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) * Diffuse samples parameter * Global multiplier parameter * Max ray samples parameter Reflection Samples (Min) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) * Reflection samples parameter * Global multiplier parameter * Min ray samples parameter Reflection Samples (Max) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) * Reflection samples parameter * Global multiplier parameter * Max ray samples parameter Refraction Samples (Min) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) * Refraction samples parameter * Global multiplier parameter * Min ray samples parameter Refraction Samples (Max) = clamp(Pixel samples X parameter, 1, ∞) * clamp(Pixel samples Y parameter, 1, ∞) * Refraction samples parameter * Global multiplier parameter * Max ray samples parameter Total (No lights) Samples (Min) = Sum of all min samples above Total (No lights) Samples (Max) = Sum of all max samples above While using premise that these parameters in Arnold and Mantra influence the same things: Arnold Camera Samples = Mantra Pixel Samples Arnold Diffuse Samples = Mantra Diffuse Quality Arnold Specular Samples = Mantra Reflection Quality Arnold Transmission Samples = Mantra Refraction Quality Arnold SSS Samples = Mantra SSS Quality But there is a catch: In Arnold if you set Diffuse Samples to 0 you will get black diffuse indirect pass In Arnold if you set Specular Samples to 0 you will get black specular indirect pass In Mantra if you set Diffuse Quality to 0 you still get samples in diffuse indirect pass In Mantra if you set Reflection Quality to 0 you still get samples in reflection indirect pass So I think we can be sure that Mantra pixel samples fire also diff/refl/refr/sss samples - so when having diff/refl/refr/sss parameters set to 0, their corresponding rays cant be 0 (but I really don't know and can't find out how much of them is fired) Also pay attention to the clamping of pixel samples - in my tests pixel samples parameters were always clamped like this: clamp(Pixel samples parameter, 1, ∞) - when using values lower than 1 the result was always the same as when using 1 This catch made my calculator useless It seems that Mantra fires all kinds of rays even when using pixel samples only while Arnold does not. I personally did not expect this behavior and as far as I know it is even not documented. (Or at least I could not find it). I spent few days trying to figure out how these parameters could relate to each other but I did not find any good solution. So in my frustration I decided that it would be probably better to ask you guys if you did not try to create some calculator like this before or to find out how all Mantra parameters relate to each other I think it would be a great help for all Mantra users to find out how Mantra works "under the hood" Thank you very much for any advice and have a nice day.
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