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poppy

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About poppy

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  • Name
    Patchara
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    Thailand
  1. Hi, I tried help card and forum, but seemed like the topic was lightly touched. - In H 14 we have new option, "Use OpenCL", in FLIP solver which, when on, disable preconditioner. - The preconditioner help card said disable for 4 sockets machine. This mean 4 cpus machine. But this card was old, like since H12. I'm running dual xeon with total 24 cores 48 threads. Does this rule still apply to 4 cpus only? - The openCL look like a faster solution than single threaded preconditioner. But it said for large viscous fluid. Now im confused. Is there any rules of thumb for this?
  2. Pls help. Proper way to continue simulation?

    Thanks Pradeep! Luckily my sim still running fine so far. I'm sure this will save my ass when the time come.
  3. Hi I have this alembic file exported from maya, few dozens of boat. They were structured, each under transform group. the path attrib was like "/boat/boat_insta###". The problem was that Alembic created thousands of polysoup, each for every wood planks. I wish I could chance them to one soup per each boat. or Maybe, is there a way to re-instance them? I'm sot sure if the boats are instanced. They look like a huge chunk of polygons instead of instanced geometry. Maybe I can transfer transform data from these maya transform group into point data. Then use Houdini point instance to instance one boat on all points.? If they was normal group and poly I might do it with foreach sop. But Alembic kinda lost me. I have to render a whole city in H. So I want to have then as light as possible. Thanks!
  4. Best linux distro for Houdini

    Centos 7 It work right out of the box. Yes it take time to setup some hardware, but most of the time it work. It was rock solid. You could try those super minimal linux, but just my two cent, too minimalists or lite Linux make thing even more complicated. Say you want some package installed or config something. For Centos, there were large support from community, and redhat method also apply to Centos. If you were worried about desktop environment, Centos 7 can take MATE or Cinnamon. I'm working on a dual xeon 24 cores, 48g ram, quadro 6000, and Dell perc raid card. Centos work like jet engine, the OpenGL was phenomenon. I have win 7 on same machine and OpenGL on Centos work like 150% Performance compare to win. The memory management was super efficient. For example, with filled up ram, I quitted Houdini. Centos take like 2 sec to quit Houdini and clear memory. Win take 10+ sec or never clear memory. I would also add that "hrender" command work natively in Linux. No need for Cygwin like windows. Centos 7 never crashed even once (so far) in my project. Cinnamon crash once or twice, but I can restart just cinnamon without killing Houdini or restart Centos. Imagine, in windows, if your desktop crash, you need to restart windows. That mean stoping the simulation. But in Centos, the beast keep running like steel train, never stop calculating.
  5. Pls help. Proper way to continue simulation?

    So I continue on the last successful explicit cache frame or the frame after it? I mean on the dop import I/O.
  6. How to "scale" beach wave?

    Thanks, I also relate volume resolution to particle seperation. It's simulating now. I will update when the result come out.
  7. Pls help. Proper way to continue simulation?

    Here, the the hip file im working on lot_1_cg_04_v15.hip
  8. Hi, So, I need to continue simulation after what I left of. I generated last 5 sim files using explicit cache. I was following Alessandro's tutorial. It worked on test, but not in real sim. Also I tried setting last working sim file as initial cache, failed too. What is the proper way, fool proof method of doing this? This is what I did 1. explicit cache last 5 frame named explicitcache.$SF.sim. Say, I got 100-105 2. delete last sim file (105). 3. reopen houdini. open scene 4. Reset Simulation on AutoDopNetwork 5. left start frame as 1 on AutoDopNetwork 6. set dop import rop to 100, hit render or set dop import rop tp 105, hit render or set cop import top to 106, hit render all failed. It cook for a while on frame 106 then swoosh to last frame in few second. The bgeo file came out 500kb instead of 3GB, as it should. I've been using H for a year and never get this thing right .
  9. Pyro explosion RND

    Hi, I like your latest image. For controlling emitter, you could either keyframe (or $F==) on activation or source volume scale. For upres, I'm no expert, but H13's pyro was so powerful that you could go straight for hires. Or if you rly want to upres, you could use GasUpres node or shelf tool Up-res. And for SLR, I use Raytrace, I believe it faster than PBR for volume imho.
  10. How to "scale" beach wave?

    Hi! I'm working on a shot of beach with waves. I'm using velocity from ocean eval to drive flip tank, with beach geometry for collision. The thing is, my tanks was 50 x 20 houdini unit (50 m beach), but the wave behave and look like a zoom in 5x2 meter scale. There was neither many detail nor as much breaking waves. I tried to play with ocean spectrum, getting the ocean eval to look right, but my flip still not. Any suggestion? Could it be volume resolution in Ocean Eval? Thanks
  11. Iceberg shader

    First, I have to say that the model look awesome. And I have no idea how to help you lol.
  12. My FLIP stopped moving

    anyone?
  13. My FLIP stopped moving

    Hi, I've been trying to figure this out for a few days, but no success. It was a sceen with flip simulation that recieve vel from curve. Somehow my flip decided to completely stop moving around frame 287. I use Houdini 13.0.237 Thanks custom_vel_test.hip
  14. approach to dangling rotten flesh sim?

    Thanks ChristianW and Sierra I will do some test on both. Btw is it possible to like make the whole deforming mesh a solid object then paint where i want H to simulate? Or cloth? Say, the whole horse skin is one piece, animated, then i paint only the area around wounds to simulate (stop being deformed by mdd cache). I saw Lightwave softbody dynamic and it look interesting.
  15. Hi! I has this quest of making som kind of dynamic on a character. It was a zombie horse with dangling rotten flesh and skin. The animation will be in Lightwave then cached and import into H via mdd or alembic. How could I do this fx? Painted attribute cloth? New FEM stuff? Thanks!
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