Jump to content


  • Content count

  • Joined

  • Last visited

  • Days Won


mrWolf last won the day on December 3 2016

mrWolf had the most liked content!

Community Reputation

22 Excellent


About mrWolf

  • Rank
  • Birthday 01/10/1972

Personal Information

  • Name
  • Location
    Los Angeles
  • Interests
    Squash, Food and Particles
  1. hey Horizon, no, I didn't use any sss. I worked in comp to achieve a satisfactory result. Something that really helps with smoke is finding the right density value. High density can give you great details, reduces render times (cause the ray tracer has to travel less samples before accumulating the full opacity), shadows really dark, smoke very thick and dirty and not a lot of transparency (like in your render). I would recommend playing with density values in the volume procedural shader and in the material shader too. On top of that, play with the ramp associated with the material shader, that changes a lot the look of the smoke too. I hope this helps.
  2. hi Horizon ! The hip files included are supposed to present a technique more than matching a specific look and they are a simplified version of the setup I created to achieve those effects in production. The purpose of the presentation was to inspire and trigger the desire to learn more. It's up to you to tweak parameters , use bits and pieces in your setup or maybe re-create the setup from scratch to understand the details and maybe come up with your own flavor. If you've a specific question about technical details in the setup please let me know and I'll definitely try to help.
  3. hey Ben ! the presentation was recorded by Framestore. It is being edited in these days and hopefully it'll be ready soon. I'll get you in touch with who's dealing with this so you'll be the first person to know.
  4. Hey Peter, it was just a bash script containing one mplay command reading more than one sequence, and with -V option to create specific row / column layout so I could visualize more than one file sequence per time. Example: mplay -V 2 2 -g flipbooks/03_tenPoints/* flipbooks/04_thousandPoints/* flipbooks/05_millionPoints/* .. this line will open mplay with a 2x2 row-column layout (in total 4, but since I'm specifying only 3 image sequences, the 4th spot in the lower right corner will be ignored) and 3 file sequences. The -g option " ... groups the command line images into separate sequences, based on base name and extension". An option that I use a lot is the option -C. This will pre-cache all the files before opening the actual player view, so that when the viewer finally shows up, the play is in real time. I didn't use this one during the presentation cause I thought it's less boring to watch the frames pre-caching opposed to a progress bar slowly reaching 100% The reason cause I was using the syntax "bash ... script.sh" was because I was storing the presentation on an FAT formatted HD, which doesn't allow to chmod +x to flag the script as executable, so I had to run a bash shell and the script as a parameter. p.s. mplay is awesome , pity it doesn't play videos
  5. Thank you ! Here it is the zip file including PDF and all the hip files with the ink setup and tornado setup. The scene files have been created with Houdini 15.5.632. Enjoy ! Hug_Nov2016-AlessandroPepe.zip
  6. Peter thank you for posting this ! I really enjoyed talking with you all yesterday , the vibe was really good and despite the length of the presentation (2.5 hrs ! luckily we had beer :D) I got really good feedback. I was totally not expecting such a response and I'm happy there is such an alive, vibrant and apparently growing Houdini community in L.A. Thank you all for attending ! @Eetu : totally ! I'll get the pdf and hip files ready in a nice zip file and post it tonight in this thread.
  7. hey j00ey, is it possible that you defined $mp as a float ? If so, that might be the issue. Try to define $mp as an int. p.s. did I just reply a 2 yo post ? lol
  8. convert connected segments into a nurbs

    Works flawlessly. Thank you Tomas !
  9. Is there any sop node to convert an open polyline into *one* NURBS curve ? This is the poly object I am starting from : Each segment, forming the polyline, is an open polyline that connects two points. There are no overlapping points. The topology is very clean and it contains all the info required to rebuild a NURBS but I cannot find any SOP node that achieves this. I tried "Convert" sop , forcing the conversion to NURBS curve, but of course it creates a ton of tiny NURBS curves , each one matching the original segment. I am sure I am missing something very obvious
  10. DOP groups for rbd Packed Objects

    hi Pradeep, thank you for the example hip file, very much appreciated. Your explanation makes sense and it works great ! I was trying to stay in the rbd land and use the old style way to drive rbd objects. But I guess with rbd packed primitives , since we deal with points and transformation matrices opposed to real geometry, we are suddenly in a pop world instead ! I've read often here and there that it's possible to access the real geometry of a rbd packed primitive in a sop solver (meaning, unpack ... use and re-pack), but I wasn't able to accomplish this. Meaning that when I re-pack the element it's not the same as the one I unpacked (primintrinsic are lost when unpacking), so the sim breaks. Is there a proper way to actually extract the packed data , within DOP, use it, and repack it seamlessly ?
  11. I have a RBD sim, with 1 packed object which contains 9 elements. I am trying to disable the gravity only on certain elements, within the packed object. In order to achieve this, I would like to control the gravity node with a dop group. I created a point attribute "falling" which I control in a sop solver, within the dop network. Then I created a DOP Group that creates a group based on the following expression: point($DOPNET+":"+$OBJID+"/Geometry",$OBJ,"falling",0) Now, this seems to work but ...not quite. I see elements that start fluctuating at a certain moment, but this moment doesn't match the moment when the "falling" attribute is triggered to 0. To start, I'd like to understand if I am using the above expression correctly. I am quite confused with the global variables $OBJID , $OBJ used with Packed Objects. Could anyone shed some light on this? I am on H13.0.547
  12. hbatch executing python script and ui error

    Graham, it works great. Thank you a lot man
  13. hbatch executing python script and ui error

    ehi Graham ! this seems very interesting ! I am not the most expert python coder out there at all, I am trying to figure out the syntax for this to work but I am struggling a bit with the syntax I tried this code: import hou def setStatusMessage(message, severity=hou.severityType.Message): print (message) hou.ui.setStatusMessage=setStatusMessage But I get this message: hbatch Version 13.0.447 (Compiled on 06/17/14) Traceback (most recent call last): File "actor001.py", line 18, in <module> hou.ui.setStatusMessage=setStatusMessage AttributeError: 'module' object has no attribute 'ui' Can you give me a hint on what I am doing wrong ?
  14. hbatch executing python script and ui error

    thank you for your reply Graham, unfortunately I cannot access the content of whatever script executes the call to hou.ui cause it's a pipeline script. I was wondering if there is any way to catch any call to ui, and ignore it. I tried with a try: except: structure but it doesn't work.
  15. I'm using a small python script to open a hip file, "do something" , save, and press the button "render" on the proprietary node that sends the job on the farm. Of course this all happens without ui, so my script errors out cause somewhere there is some python code that uses hou.ui.setStatusMessage, and I guess hbatch doesn't load the ui module. This is the error I get: hou.ui.setStatusMessage( "Creating the render data", hou.severityType.Message) AttributeError: 'module' object has no attribute 'ui' This the script: import hou hou.hipFile.load("myfile.hip",True) <change parameters and do interesting stuff> print ("submitting job on the farm\n") farmrender=hou.node("/out/farm_render") farmrender.parm("FarmRender").pressButton() print ("done\n") hou.exit() and this is the error message ... hou.ui.setStatusMessage( "Creating the render data", hou.severityType.Message) AttributeError: 'module' object has no attribute 'ui' I already tried to execute the actual code contained in the button, but I get the same exact error. Is there any way to suppress any call to hou.ui when a script is executed via hbatch ?