Wall destruction simulation in blender

welcome to another blender tutorial in this one i'm going to show you how you can create realistic wall destruction effects using only built-in addons in blender we're gonna learn how to create four different materials including realistic wood that splinters when it breaks apart we're going to build the wall add some particles for the fine details then simulate our own smoke elements shade everything and render out a fantastic render let's not waste any time and dive straight into the video okay so let's start with opening up a new blender scene then adding in a cube tabbing into edit mode and changing it to the scale of a brick then we want to hit ctrl b to bevel the edges then we can go back into object mode and add an array modifier this will allow us to stack the bricks automatically change the factor x until they barely touch each other then increase your count until you have your desired length of the wall then add in another one and change the factory set this time until they barely touch each other then multiply it by 2 and increase the number then duplicate the entire object move it up until it fits precisely then move it to the side select them both then hit ctrl a and apply visual geometry to mesh this will apply the modifier then go into edit mode select the bricks that stick out hit g and move them until they're flush with the other bricks do this on both sides hit ctrl j to join the objects into one then add in an armature to reference the scale of the scene hit s to scale the wall until it fits your desired scale then go into edit mode select everything hit p and then select buy loose parts this will separate all your bricks into individual objects okay so let's give this guy some physics properties select everything then hit object rigid body and add active then add in a ground plane and give it a passive rigid body as you can see the bricks fall to the ground and collide with each other but this isn't really our desired effect we want to make sure that the origin of each object lines up with the actual center of the mass of the object to do this select everything hit object set origin you can select either surface or volume here it doesn't really matter as you can see the origin of each brick is correctly at the center which is great let's keep moving when the projectile hits the wall we don't want the entire wall to just collapse on itself so we're going to select some of the bricks around the edges of the wall and change them from dynamic to animated every time we change a physics property and want it to copy to all of our selected objects just right click that property and select copy to active this will copy the settings to all of the selected objects alright so now we have something that looks good but the explosion happens immediately all by itself to fix this we want to select everything and then apply scale if we were to simulate right now the piece would just fly apart without sticking together at all but we want to add constraints between them we keep them together select all of our rigid body objects then hit object rigid body and connect when it's done calculating change the connection pattern from selected to active to chain by distance this will connect the bricks to their neighboring bricks but we want to change some of these properties select all of the constraints then go into one of them head to the physics tab and deselect disable collision then we want to check breakable and change the threshold to something pretty low as usual we want to go through all of these settings right click and select copy to selected to copy the settings across all of the constraints now everything sticks together nicely so we can begin breaking it apart for now we're just adding in a sphere and giving it a passive rigid body just play around with different sizes of the collision object and different settings for the constraints until you get something that you like this is optional but i decided to displace the sphere to give it some more randomness in the explosion when you're happy with your simulation you can select all of the objects then go to object rigid body and bake to keyframes this will make it so that the computer doesn't have to actually calculate the trajectory of these pieces over and over again when we add more layers to it so it will cut down on the processing speed and allow us to add more details without slowing the scene down too much let's create a layer of plaster this time we're gonna do the exact same process but instead of building the pieces like we did with the brick wall we're going to use a built-in add-on in blender that is called cell fracture to fracture the object into multiple pieces first select the object and add a particle system this particle system is going to control how the object is shattered so keep the number pretty high then you want to change the source to emit from volume and distribution to random then set the end point to frame 1. as you can see this creates a lot of particles across the entire volume of the mesh then we need to enable the cell fracture add-on so go to edit preferences add-ons and search for cell fracture you will find it right here make sure this one is enabled then you can save your preferences now you can hit object quick effects cell fracture select own particles and change the source limit to zero [Music] when it's done you'll see that your object has been shattered into multiple small pieces then we want to select this entire layer and copy it because we want to use it for the plywood later so we don't need to do the whole fracture thing one more time before we do anything else let's organize the scene a bit create collections for all of your layers so that will be bricks plaster wood and plywood then you want to select all of your objects to go into the collection and then hit m to move and then select your collection to then select the entire layer just right click on the collection in the scene manager and then select objects then we just kind of copy the steps from the bricks and they give them rigid body properties connect them and simulate but just keep in mind that you have to give the bricks rigid bodies again but this time instead of them being dynamic we're going to have them animated because remember we already baked the simulation for these ones this is looking really good so we'll just bake everything to keyframes and then we'll move on to the wood add in the cube and copy the steps we did with the plaster so add a particle system change source to volume random but keep the number lower this time go to object quick effects cell fracture hit own particles and set the source limit to zero then fracture select all the pieces and scale them up on the z axis what we're left with is something that looks a lot like wooden splinters and when we simulate this is going to resemble a wood beam breaking apart give them active rigid bodies and then go to object rigid body connect to connect them and also don't forget to set the connection pattern to chain by distance select all of our constraints go into one of them then make them breakable and enable collisions again and copy all the settings to selected constraints then move everything to the wood collection now that you have your pre-made wood beam we can copy it multiple times behind the wall to create some kind of wooden support structure behind the bricks and keep in mind all we're doing here is just adding more layers to make the effect more detailed and interesting you can use all of these steps by themselves but it looks best when you combine them now if we select the ends of some of the wooden beams and make them animated instead of dynamic and simulate we see that we have something that looks pretty good but i want the wooden pieces to fly more forward so i'm just gonna sheet and add in another sphere and give it a passive rigid body scale it down and place it behind the wall so it forces them forward this is a good example of how you can shape the physics of the scene just using basic tools it doesn't have to be realistic it just has to look good and then when you're happy with the wood just bake it all to keyframes for the layer of plywood behind the wooden beams we're gonna do the exact same thing that we did with the plaster but this time we're gonna give the constraints a bit higher breaking threshold this will make it so that the plywood sticks together more than the plaster did which is what we want okay now that we're happy with the simulation let's texture it the website i like to use for my textures is called polyhaven if you go to textures here you can find hundreds of high quality 4k textures that are completely free to use and what's even better than that is that we can just download the texture in a blend file and then append the material so we don't even have to do any node work at all so just find the textures that you want to use then hit download right here this will download a zip file with the blend file and the textures so just extract it and put it anywhere you like then back in your blend scene you can hit file append and then find your downloaded blend file browse through the blend file until you find materials and then select your material so now the material has been appended to your scene and you can use it with whatever object you want so just head to the material tab and select your material to copy the material across all of your selected objects hit ctrl l and then select link materials now if you go to the uv editing view you can see that all of our pieces are already unwrapped and ready to go so just scale up the uv islands until your texture matches the size that you want for your scene and when we play the animation the material sticks nicely to the pieces the bricks were a bit harder to get right so just select all of them then hit numpad 1 to go into front view from there you can hit u and then project from view then you just have to scale the uv map until the seams line up and you will have a realistic brick texture for your wall this will take a while but just try to get it right do the exact same thing with the wood and the plywood and your scene will be textured and i think this is really starting to take shape but i missed some more details so let's add a couple of particle systems that will simulate the smaller fragments from the explosion create a new collection and call it something like wood splinters then if we select parts of the fracture wood we can use these as the particles for the particle system so just grab a couple of different collections of splinters and then we're going to join them using ctrl j you can select them then hit m to move them to your collection then we want to add a uv sphere go into edit mode and delete the lower half and scale it down a bit this is going to be our particle emitter so add a particle system to it we can change the frame end to frame number two to have it emit all of the particles at once we can add in a plane and give it a collision modifier to how the particles collide with the ground you want to increase the friction and the damping of this then back in the particle system we want to change the render as halo to render as collection and then select the collection with the wood splinters this will make it so that each particle in the particle system is a random object from the collection the reason we did three different ones was to give it a bit of randomness check the rotation and dynamic and give it some angular velocity you can play around with these settings until you get something that you like but generally just try to make it look random if we place the emitter object in the center of the explosion we see that we get lots of small splinters when we're done with the wood splinters we want to add in some smaller particles from the plaster as well so add in the taurus this time scale it down subdivide it and displace it with a cloud texture we want to animate this emitter object to grow bigger as the plaster crumbles for these particles we're just creating a new collection and adding in a couple of low resolution spheres that we displace a little bit and give them the plaster material i suggest that you shade these ones smooth and also you want to scale down the uv map so that the details are the correct scale give it some velocity in the direction of your explosion do the whole random rotation thing and then you're done all right now let's make a couple of different smoke elements that we can place around the scene to bring it all together okay so we're going to open up a new blender scene and delete the default cube add in a sphere and increase the subdivisions then we want to add in a displaced modifier give it a new texture and select clouds this is going to be the object that emits the smoke so we want to make it pretty random you can increase the strength of the displacement modifier right here then what we want to do is hit object quick effect and then quick smoke this will give us a basic smoke domain that we can work with so just scale it up to a pretty big size and then we want to enable initial velocity on the emitter object increase the resolution to something like 64 and change the emitter object from smoke to fire and smoke when i add a couple of keyframes to the emitter object so it goes from really small to quite big in a couple of frames this will give the explosive effect of the smoke simulation and when we're done with the basic shape of the explosion we can shape it however we want using different force fields i'm gonna use a turbulence field that i'm animating to be more turbulent in the beginning of the simulation and fade off as it progresses also you want to make sure to enable dissolve and put it to something like 35 this will make it so that the smoke dissolves with time keyframe the surface emission to go from 1.5 to zero when you want the smoke to stop emitting i'm actually animating the size of the cloud texture as well to give it more randomness all these tips are optional but you can play around with them and see whatever works best for you then when you think you're ready to bake you want to change the cache type from replay to modular and also check is resumable activate noise and then bake the simulation you want to make sure to hit both big data and then when you're done hit bake noise as well alright so now that it's done baking we have something with great detail and we've shaped it just to our liking in the output folder that you selected under your cache you should now have an openvdb sequence that you can import to your original scene so just shift a then hit volume import openvdb then browse to your output folder and select all of these files and then hit import open vdb volume as you can see blender will now have imported your exact smoke simulation and all we need to do now is add some shading to it in the shading tab change the density attribute to density underscore noise and then set the density to something pretty high add an attribute node under the name you write flame underscore noise and then you connect the color to the emission strength to set the color of the fire add a black body node and connect the color to the emission color i went with a temperature of 3000 to control the strength of the flames we want to add in a math node that we set to multiply and then we can choose a value that fits the scene and as you can see this very simple note 3 creates some pretty realistic results i created five different smoke puffs using the same method that i just showed you the only thing i changed was the shape and movement of the emission object and some of these settings with the force fields in the future i may make another video where i go more in depth into making smoke simulations but let's stick to the basics for now but you can find all of these smoke elements for free on my patreon along with the blend file if you want to play around with it yourself and i kept it open for everyone so you don't even have to subscribe to my patreon although i appreciate if you do just import all of your smoke elements and place them around the scene then i added in a ground plane that i textured with a material from poly haven then i added in a displacement modifier to roughen up the surface finally all we have to do is animate the camera and hit render i want to thank you so much for watching this entire video and also thank you for all of the great comments on the last one i'm really working on improving this format so if you have any suggestions on how i could improve the quality of these videos please leave them in the comments below and also thanks a lot to iagonyardman for providing the music for this video i'll link his youtube channel in the description below so you can check it out if you want to thanks again for watching and see you in the next one

Channel: FxForge

Views: 121,826

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Id: VFmaKeZ0Sko

Length: 15min 25sec (925 seconds)

Published: Sun Feb 20 2022