VMT 029 - HOUDINI - Destroying Sand Castles

[@Bolaway]

A 4 years tutorial save my heart!! I used your concept to finish my job on vellum. Thanks so much!

[@rickybansal9465]

Thanks for all your tutorials Varo! What I love about your tuts is that I learn so many side tips and tricks along with the main topic that I can use!

[@MIXTraining]

that's the idea Ricky, so glad you're learning, thank you for watching

[@activemotionpictures]

Thank you so much!! you make Houdini look so easy!! :D

[@MIXTraining]

Thank you, it is easy when you put the time to learn it, you can do it to!!

[@BlacBaluun]

Great tutorial, much thanks!

[@B_dav]

Plenty of useful tips, thanks you

[@MIXTraining]

thanks

[@MESHQuality]

Awesome tut! Thank you!

[@MIXTraining]

glad you like it, cheers!

[@chancenorris8854]

Thanks, very helpful...didn't know about the upres tool.

[@MIXTraining]

UP res tool makes it more sandy looking is nice

[@IvanEngler]

awesome tutorial!! (and i'm a c4d user, but i had to watch it to the end)

[@MIXTraining]

that's great Ivan, I do that as well, gives you ideas, thank you

[@rajeshmohanty91]

Nice tut with nice presentation... especially that logo one and 10 min waiting Jaja ...cool

[@MIXTraining]

thank you, glad you like it

[@NiuqCam]

Thank you!

[@k4keshaw]

wow looks cool varo

[@MIXTraining]

Thank yoi

[@jacobhinston1676]

Appreciate the good work please make a full of details about the parameters on how to control create & manipulate volumetric simulation like fire smoke & clouds

[@MIXTraining]

already did for fire, check it out here magicalfirefx.mixtrn.com/

[@Marienkarpfen]

This was a useful tutorial. Short, Easy, and explains many things. I like it if someone goes over shelf tools and explains the different things int hem so you understand them (instead of reading through the documentation). Would be awesome if you had chosen a normal sand behaviour so the sand flies all over and rendered the whole scene out, so you see if the result is realistically looking. I dont exactly know what you did at the end tho? Why did you visualize the ball in the grain sop as smoke? Was it about rendering? I thought you put a null under the ball, then import it into your dop, link particles and ball, then Cache it, then render the cache? Also the roberto running gag never gets old :D

[@MIXTraining]

Hi, glad you found it useful, normal dry sand wouldn't be able to have a shape like that, needs to be wet, At the end I add the ball in the DOP imports to cache it at the same time since it reacts to the sand, if you cache it separately you'll have to simulate everything twice :) that's why

[@Marienkarpfen]

Oh so that ball is the actual modeled sphere you created around minute 10? I thought you always had to reference it in some way. Good to know!

[@MIXTraining]

yes is that ball we are using to collide with the sand

[@caveman357]

@@MIXTraining Why didn't you just keyframe the ball? Why put velocity on the points? Is there some type of advantage?

[@MIXTraining]

@@caveman357 is different, if I keyframe it, it won't react back to the sand mass and friction, it would just move, adding velocity we are making the whole system dynamic

[@weizhaozhang5988]

非常好，感谢分享

[@yusufamplifice8260]

Great tutorial! Quick question: Any idea on how to animate the Sphere (ball) so it stops after moving? I can't wrap my head around attribute wrangle and the vexpressions. I want it to move to y +1 and stop.

[@MIXTraining]

If you need the sphere to do something specific just animated as any other object and import it to dops as a static deforming object

[@felipe_ai]

Really amazing bro, how would you shade this or render it?

[@MIXTraining]

Just render it, is all prepared to render, the grains have color and attributes to render, for my test I just placed lights, camera and render, didn't add any shader

[@waweep9380]

Hey there, love your videos. Was this rendered with redshift?

[@MIXTraining]

Hi Thank you, no it was rendered with Mantra :)

[@Lorelei347]

Hi amazing tutorial !!! I have a question, how can I say to awaken by geometry to influence just one of the object? Because I have a castle and the ground, and I don't wont the awaken by geometry influence my ground. Can you help me?

[@MIXTraining]

When you set the awaken by geometry it only uses what you tell it to use, in my case I just used the ball to wake them up

[@Lorelei347]

I resolved thanks! I discover that you can say to the awaken to exclude an object. Now I have an other question sorry, how can I say to the ball to hit the castle ( I want the ball tuck the castle just a little bit) an then I want it come back from the same position of frame one. How can I do it? I think I need to add something to the script of the attribute wrangle, but I realy don't know how.Thanks so much for your patient :)

[@MIXTraining]

I don't understand what you want, but you could just animate the ball doing whatever you want if you don't want to simulate the movement

[@martinwettig]

Good tutorial, keep it up. And fire your sound guy.

[@MIXTraining]

thanks, yeah not sure why my mic was getting so saturated, I will fire myself :)

[@martinwettig]

Hehe.. I'll survive, I guess. Best regards...

[@mattisclement7680]

sry for the rookie question, but when I use awakenbygeometry the ball bounces back from the castle. And it remains still, like it would bounce against a wall, what have I done wrong?

[@MIXTraining]

When you add more particles the MASS of the castle increments so you need to increment the MASS of the Ball to compensate I actually mention that in the tutorial 13:34 Cheers!

[@haarisha5101]

hello sir i m trying to collide the sand with a man punching the sand everything is working fine when the man punches, the sand activate and falls in but its not colliding with the hand in ur video when ball collide the sand will fly and fall , and another problem is awaken pop white cloud thing is shown in render pls help me sir

[@MIXTraining]

Is hard to understand your issue with just text, go to our discord channel and post your issue there with some images

[@haarisha5101]

@@MIXTraining where can i find the discord link sir

[@MIXTraining]

@@haarisha5101 mix-training.com/ community support

[@VFXLtd]

Hey, got a problem with grains in houdini. Why is it sooo slow? I mean, even when i turn the simulation off as well as the display node just to adjust the settings, it somehow keeps "Baking" and my mouse turns into a clock icon. Also, when i save it to disk,and when i enable "play back simulation" and the timeline is purple, why does it say its baking again?? E.g. cooking OP Grain_particles. Even though i have simmed it to disk, i cant play it smoothly. Its only got 3M points, and it feels like 300M However, i have no problems with FLIPs. Any ideas? thanks

[@MIXTraining]

maybe you saved t o disk but didn't load from disk, maybe try disabling the sim node completely

[@VFXLtd]

I actually used the AutoDOP out node to save it out. Is there a difference between this and grain particles DOP I/O ?

[@MIXTraining]

did you cache the result or the .sim files, cause that's different

[@VFXLtd]

Seems like the problem occurs when i press "upres sand". Do i upres sand and cache first, or cache and then upres?

[@MIXTraining]

cache when ever something is slow :) first cache the sim, then you can upres that but that will be slow, so if you want cache that as well

[@ДмитрийКисляков-ь4е]

Hello! I can't get "sand castle destroyer" achievement:) Have a problem: then huge pile of sand felt down it has some kind of exploding bounce... cant fix it ((

[@MIXTraining]

try activating OpenCL in the grain update node I found that is more stable

[@ДмитрийКисляков-ь4е]

openCL add some weird behavior to my sand, but anyway, I increased constraint iterations and bouncing energy almost disappeared.

[@MIXTraining]

OpenCL make mine really stable, but yeah is always sim and tweak until you like it :)

[@mykebo15]

nice tutorial and tips dude, love your channel, i tried this weekend, but the result same line him, huge pile of sand felt down it has some kind of exploding bounce, still figure it out why, turn on opencl, increased constrain, do you have any tips for that, this happen when i'm tried hi-res simulation with small particle separation. thanks anyway

[@markroxy1750]

particles awaken not working.. where did i do wrong? keep getting error. wakeup with volume is error .

[@MIXTraining]

I’m not sure, you can go as in our community and post screenshots, go to www.mixtrn.com link on the top

[@azizulk4641]

why isnt your houdini the classic one?

[@MIXTraining]

I just have a different color theme

[@azizulk4641]

oh may i know the settings to it? because mine looks dull and boring

[@MIXTraining]

Menu >> Edit >Color Settings, has some themes you can try, if you want mine you can get it from here mixtrn.com/community/tools-and-scripts/houdini-mixtrn-color-theme/

[@azizulk4641]

thank you very much