How to destroy 3D stuff in Blender

so as much fun as making things is we all know that destroying things is often way more fun so step aside Michael Bay in this blender tutorial you're gonna be learning three unique easy ways to animate destruction in blender the coolest thing is we're not using any paid add-ons everything we're doing today can be done by you for free at home and a big thanks to kamino for sponsoring this video their custom built water cooled workstations are Beyond incredible learn more about Camino and their grondo RM featuring four RTX 3090s water cooled later on in the video and check them out with the link in the video description below so our first destruction animation is going to be done using only blender's internal tools and that is going to be using particle systems and the explode modifier so I'll be showing you how to do this on a TIE fighter which I think is a good use case for this Method Of Destruction so I'm using this model here off of sketchfab I've modified it to work right inside a blender you can download this in the description if you want for this method you start by adding a particle system to your object extend the lifetime for as long as you want the animation to go and then adjust the start and end frames to when you want your model to start destructing to when it's completely destroyed this has to happen pretty fast to be semi-realistic so I'm going with 15 and 18. basically it's going to take three frames for everything to be destroyed into particles so jumping into your modifier tab add in the explode modifier this method works by taking the faces of your mesh and transforming them into particles and then you can interact with those particles with force fields and objects and stuff so it's pretty cool choosing cut edges will give you more of The Shard look that looks better for Destruction and you can make these particles a little bit smarter by going to the particle system tab checking rotation and then also checking Dynamic then in the physics tab you can choose multiply mask with size and increase the mass to something larger three Works in this example then under viewport display you can hide the particles by choosing none so now that your model is destroyed into particles you can do some cool things like using forced fields to control these here I added in a turbulence modifier gave it a strength of something big and you can see how it just rips the model apart now sending it in every which direction which might work well for a space explosion you can also add objects to interact with this for example I'll add in a plane for a floor here and under the physics just choose Collision give it a dampening of five and a friction of five and then add a little bit of randomization to both of these values as well for a little bit more realism and you can see with that the particles are now interacting with another object you can do the same thing with animated objects if you want to have a Suzanne head for example rip into the Tie Fighter so here I just added the same physic collisions to that Suzanne model I enabled automatic keyframing added a keyframe and frame one jump to frame 30 and added another keyframe now you can see that Suzanne had interacting with the particles and ripping through that TIE fighter like it's butter it's not always the most realistic but it's a super easy method to get quick results exploding things in blender second way you can animate destruction in blender is using the cell fracture add-on and rigid body physics I'm rendering all of these animations on the grondo RM from kamino kamino builds custom water cooled professional killer workstations and by killer I mean this thing destroys benchmarks the grondo RM I have here features a water cooled 32 core threadripper CPU along with four water cooled RTX 3090s blender works extremely well with extra GPU power so single frames in these animations were rendered in just seconds in the full HD rendered animations finished in just around 25 minutes learn more about kamino and their Grando RM water cooled workstations with the first link in the video description for this example I have a new 3D scanned Rock model that you'll be learning more about in the near future so stay tuned for that and you guessed it we're gonna be destroying this rock so for this one we have to start by enabling the cell fracture add-on and the preferences once you check that box it's enabled and if you go to your object drop down quick effects choose cell fracture here we have a lot of settings but it's actually quite simple The Source limit determines how many broken parts of the Rock gonna have noise adds a little bit more Randomness I found a low value of this works you can't go too high with it though and then the recursive shatter options allows you to take shards that are already broken and break them into even more small pieces you can go a little bit with this I like to go about two but again too much with the rigid body physics gets pretty messy there's a few other options here for determining which shards get broken into smaller pieces you can play around with these making it random or just breaking the big shards smaller but I actually found small to be more realistic and then the last setting that you want to pay attention to is the material setting here so if you look at the object I actually have two materials this is because I want a material for the inside of those shards as well and if you set your settings to be material one that will mean that all the materials on the inside of this object once it's shattered will be using the second material in your material tray so with that said go ahead and click ok now you can see that object is broken into a bunch of smaller Shard objects and your original object is still there you're going to want to make sure you grab this and move it out of the way otherwise it will be messing up your animation now go ahead and hit B to box select all these shards inside of that rock go object down to rigid body and choose add active then you can go back to object again down to rigid body again and choose calculate mass with them all selected still here you have a bunch of different presets for calculating different weights of different objects and for this one we're going to choose Stone crushed now you can see if you jump to the physics settings all of these objects have a different unique Mass depending on the size of The Shard this adds a lot of realism to your animations grab a floor plan then go object rigid body and choose add passive and that's the basic settings for a rigid body animation and as you can see once it's destroyed the inside of this rock has a different material and this is just a basic Rock PBR material with the mapping set to generated instead of UV this is really the only way to avoid too much stretching and the textures on the inside of those shards easily but now you can take these rigid bodies even further by using a few constraints so select all of your shards again go object rigid body and this time choose connect to keep it organized I like to select all the rock shards and constraints and then hit M to move them to a new collection that I'll name something like rack now if you shift grab one of your constraints to make it the active constraint and jump to your physics tab you can see that we have a few settings here for the constraints starting with breakable go ahead and check that on and then right click copy to selected this will add the same setting change to all of those rigid body constraints same with the threshold select them all change the threshold to something like 25 and then right click that value and choose copy to selected now all of these constraints have breakable and a threshold of 25 set to them and so if you played back the simulation you can see it's quite a bit more realistic as some of the shards hold together and some of them break now that just playing around with this threshold value will determine How likely a rock is to break when it collides with something as you can see a value of 55 breaks a pretty decent amount still but a value of a hundred actually holds together more or less another great physics use case for the cell fracture add-on is something like a log or beam like I have here if you want to have a little bit more control on how your object or log in this case is shattered you can use The annotation tool you can select it on your toolbar or you can hold down D and draw some lines across your object here now if you go object quick effects and choose cell fracture you can shift select annotation tool and now when you process that you can see that all of these shards are focused around those lines that we drew on our object now you can even affect the cell fracture even more but this time along the X Y and Z scale change the Z value all the way down to something small like a 0.1 and that will make these shards very long and skinny along the z-axis as you can see here which look a lot more like shards of wood if you're going to shatter this log as of course enzymatic specs I went ahead and did now you might have realized the default Cube almost made it throughout the entire video without getting destroyed so we have to take care of that right now for our third Method Of Destruction inside of blender we're going to be using the molecular free add-on first we'll install the molecular add-on by going into your preferences and making sure you've downloaded the molecular script I'll leave the GitHub Link in the video description where you can download the script for your specific computer then just click install in the blender add-ons and choose the molecular zip file and if you switch from all to user installed add-ons make sure you have the molecular script enabled with that little checkbox there so to bring up your molecular script add-ons you're just going to hit n on your keyboard to bring up your properties tab along the sidebar we have a few different tabs just select the molecular plus option here right off the bat with the cube selected you can choose 3D grid and if I hit Z to go into wireframe mode and you can see this adds a whole bunch of particles in a grid inside that Cube you can go ahead and add a floor plan choose the collider option on the plane within the add-on here and then if you played back your simulation you can see all those particles would pour out and fall onto the plan but something's different because unlike blender's normal particles these are actually piling up on top of each other because they're interacting with each other that's one of the ways where the molecular script is super cool we can make it even smarter if we jump to our physics tab with the cube selected you can see we have some settings for the molecular add-on starting with the link setting go ahead and choose Link at Birth then choose calculate particles weight by density and give it the preset of sand which I found worked pretty well just by changing those two settings if you were to move your Cube up into the air free the bake and then calculate the stimulation again you can see that it now bounces around like a chunk of jello because all those particles are linked together but if we wanted to break apart because this video is about destruction you can take the broken value here at the bottom and give it something smaller like a 0.1 a little bit of random broken also helps add some realism to the simulation now you can see it's breaking with only certain parts of the particles still holding together depending on where the velocity is hitting that cube in a very realistic satisfying fashion I might add now to render these particles you can just add in another Cube select your particle Cube and under the particle settings first change the viewport display to not show the emitter so uncheck show emitter and then under the render settings also uncheck show emitter then under the render as change it from Halo over to object and for that object choose the second Cube that we just added into the scene now if we recalculate our simulation you can see it's made up of a bunch of smaller cubes this is pretty cool but I still don't feel like we've caused the default Cube enough pain yet so go ahead and add in another Cube this will be our destruction Cube and the molecular settings set it as the collider enable automatic keyframing and on frame one give it a keyframe on frame 50 move it to swipe through the cube and add in a second keyframe and then when you calculate the simulation you can see here that I missed that's a little embarrassing so go ahead and move those two keyframes down a little bit and you can see that now it collides with the cube when we calculate the simulation and it looks really sick you might notice that these cubes aren't rotating and they're keeping their exact same rotation the whole time which doesn't look very cool so just like we did for the first method of destroying things if you jump to your particle settings and turn on rotation and enable Dynamic then calculate your simulation again you'll see that those cubes are now rotating and when they get collided with they go spinning and fly off in a very satisfying destructiony type of way now you can change the quality of this by selecting your particle Cube and changing the size I found going down to a .05 was about as far as I wanted to push it then you just free the bakes and click 3D grid again and as you can see it added about twice as many cubes to our simulation you can adjust the step setting here as well in the add-on going smaller we'll calculate the physics faster but lose a little bit of accuracy so this is up to you I'm going to go with a value of 12. if a lot with the magic of editing here is our finished simulation and it's looking very dope so go ahead and Destroy as many different fault cubes now as you like now as a bonus tip you can use this method in combination with our second method having the molecular particles as a ground plane underneath a cell fractured surface and when you set up an object as a collider for the molecular add-on as well as the rigid body physics you can get some pretty cool results bursting through both of these layers combined so if you guys have learned a few new ways to destroy things inside of blender hope you enjoyed this video if you did let me know with a like on the video and if you had a question you can leave a comment below thanks again to Camino for sponsoring this video check out their incredibly cool pun intended custom water cooled workstations with the link in the video description that'll do it for me guys and I'll see you soon in another video bye-bye

Channel: CG Geek

Views: 196,178

Keywords: Animation, Physics, Blender Tutorial, Destruction, Destroy things, Easy, Beginner, Fun, Tutorial, Tutoril, CG Geek, Blender, Game Engine, After Effects, CGI, 3d video

Id: 5PxUhCcodes

Length: 11min 56sec (716 seconds)

Published: Thu Dec 08 2022