Houdini Tutorial: POP grains tearing effect

[@penvirohk6771]

Thank you! Very much and we need more Houdini tutorials from you

[@DiffuseFX]

Thanks! I appreciate it :)

[@mvximvleviticus5712]

i really enjoy the click sounds of your mouse

[@stikkgreen5237]

Just wanted to echo the appreciation for the insights, and the time it takes to share. Seriously, thank you so much man. Great content. Love your pace, and ability/willingness to explain everything so thoroughly. That really helps to understand a lot of this stuff.

[@DiffuseFX]

Thanks! And I appreciate the visualization tips - though I see you've edited them away from your comment ;) Don't worry - it wasn't presumptuous. There's still a ton I don't know!

[@milosgalovic5583]

great one as always. interestingly tho, i found that setting pin parameters upfront doesnt work with openCL

[@damagejacked]

Never too late to appreciate how incredibly clear yet advanced your tutorials are.

[@md310]

very grateful .. beautiful presentation - some nice concepts I had not thought of.

[@DavidWKimber]

What a goldmine of learning! It's still a bit above me re: VEX, but the more I go through these lessons the more it starts to imprint. It helps that I took some python and javascript but this syntax-type stuff, as a visual learner, always takes the longest to stick. That said, this effect will be super cool for some floor-eating acid I want to do. Thanks much!

[@DiffuseFX]

Any programming experience at all will give you a leg up, at least - but VEX is closest to C, and definitely has some unique idiosyncrasies, both in syntax and in the logic / execution flow. You'll get the hang of it, though!

[@marijnkarsten7323]

This is gold, couldn't get the wire thickness to work , will investigate!

[@DiffuseFX]

I didn't cover that step in too much depth, admittedly. Sorry! Hope you get it sorted :)

[@vincentthomas8492]

Your channel is gold for me, thanks you so much!

[@DiffuseFX]

Happy to hear it!

[@Elisnaike]

Absolutely fantastic! I can see there being tones of uses from this.

[@MElsadig]

Great Tutorial , Thanks

[@ahahlex]

😮😮 learn so many new stuff, thanks a lot ! The result is so good !

[@DiffuseFX]

I'm glad to hear it!

[@tunatopaloglu4770]

Amazing! Thank you.

[@excessoats]

Cant seem to have anything happen at 35:15, went through everything a few times and still nothing.

[@DiffuseFX]

Maybe check out the hip (link is in the video details) and see if you can side-by-side to figure out what went wrong?

[@philippwelsing9108]

Had the same issue. For some reason, the correction of the fit function to "...0, maxlayer-1" does not work. If you keep it at "...1, maxlayer", it works again. The HIP file shows the same.

[@philippwelsing9108]

Just tried some more, but here's the truth: The sheet sim does not work at all in H20. It works a little in 19.5, but not well. The orb sim seems to work in 19.5.

[@philippaps44]

great tutorial! really good breakdown

[@Carteblanchefx]

Awesome tutorial! Thanks!

[@DiffuseFX]

Glad you liked it!

[@massimobaita7178]

Thank You very much!

[@lveronese]

when "paste relative reference" into the wrangle you can select any part of the code and the paste command will replace only that instead of deleting everything

[@DiffuseFX]

Thank you!! I could have sworn I'd tried that, but I just checked, and sure enough! Still strange that it behaves that way in the wrangle context, but not in parameter fields where it will just paste at the cursor. A wrangle seems like the last place you would want a global replace by default... nevertheless - thanks for the tip!

[@StephaneSOUBIRAN]

Waow ! Awesome tutorial ! Merci

[@DiffuseFX]

De rien!

[@uzaykisi1863]

Can you make a cotton candy or fiber tearing tutorial, i just found one but it's asking for money?

[@arieskanp]

wow awesome!! thank you for sharing :)

[@DiffuseFX]

thanks for watching!

[@bekabaratashvili3178]

Great tutorial! Have a question. f@strength attribute (in created constraint_properties wrangle), where does the solver use this? as, i notice if i delete @strength attribute it does not change anything.

[@DiffuseFX]

From the houdini docs, strength gets used by POP grains for constraint breaking. It's possible that the dynamics are pretty similar when the default is used instead of specifying it. Certainly for the top few layers it wouldn't look too different, but I expect that overall it should be tearing faster if you don't specify strength. I'll take a closer look, though!

[@bekabaratashvili3178]

@@DiffuseFX Thank you

[@DiffuseFX]

@@bekabaratashvili3178 Ok - played around a bit more, and can confirm that strength works. If you set it really high, for example, you see a big difference. The reason it isn't showing a strong effect in this setup is because the geo wrangle in DOPs is also controlling the dynamics by scaling restlength in a layer-dependent way.

[@bekabaratashvili3178]

@@DiffuseFX Yeah, you are right, thanks again!

[@lveronese]

great stuff, If I may, you should eq out some low ends from your mic, every little bump on the table sounds like a sub.

[@DiffuseFX]

yeah - my setup's not ideal, and some combination of that desk and that keyboard really hammers. Things are a bit different now, but still far from ideal sound-wise. Working on it!

[@KageBlink]

Hi there! Just wondering, how does one add thickness to the wire? Thanks!

[@DiffuseFX]

I'm sure you've found a solution by now given how late my response is (catching up on a bit of a backlog!), but if you are rendering in mantra or redshift (and most others that support curve rendering), you can just set pscale (can even vary along the curve). If you want it in geometry, you can use polywire (but be warned - it's expensive!), or if you want something more organic, you can resample the edges at a small resolution, then mesh with fluid surface (also expensive). Hope that helps!

[@KageBlink]

@@DiffuseFX Yeah I think polywire is the solution I found, but I'm thinking on going back and setting pscale to ttry that one out! Doesn't matter how long it takes for the reply, still appreciate you going the lengths!

[@rustytoe178]

Hey, I've got an issue where the bottom layer never breaks, regardless of strength

[@DiffuseFX]

Hm. Did those points maybe get pinned?

[@DiffuseFX]

I was just looking through the project again to follow up on a different question and I realized the answer to your issue. Sorry I didn't catch it sooner. On the geo wrangle inside DOPs, the change to restlength is based on layer, and the way I set up the fit-range has the maxlayer restlength being left at 1 - so the bottom layer will never feel any strain.

[@SeedBaoLong]

good!!