WEBVTT 00:00.270 --> 00:02.640 Welcome to the cell fracture add on. 00:02.640 --> 00:04.950 So this is going to be all about fracturing objects. 00:04.950 --> 00:08.970 In fact the next couple of lectures are also going to be about fracturing objects. 00:09.000 --> 00:10.270 Using this tool. 00:10.440 --> 00:13.350 So we're going to go ahead and turn on the cell fracture add on. 00:13.350 --> 00:15.260 It's not enabled by default. 00:15.300 --> 00:16.800 We'll just turn it on so we can use it. 00:16.800 --> 00:20.150 We're going to have an overview of that Aadhar add on as well. 00:20.160 --> 00:25.890 We're going to look at the various ways of fracturing our model and how to prevent random explosions 00:25.890 --> 00:28.040 when you start applying physics. 00:28.080 --> 00:31.770 We're going to break apart the model only use in the object itself. 00:31.770 --> 00:37.590 There are a couple of other options and we'll deal with the manual fracturing using these other options 00:37.650 --> 00:39.710 in following lectures. 00:39.720 --> 00:43.730 So let's go start fracturing things and hop on over in a blender. 00:44.440 --> 00:49.500 Okay so I've opened up blender fresh with our default cube in the scene that we can play with. 00:49.630 --> 00:54.180 I'm actually going to lift that up on the z axis by one. 00:54.400 --> 01:00.400 And yeah I'm going to say fats because I'd prefer if I'm going to start with a cue that it starts on 01:01.060 --> 01:02.550 some of the same my start up. 01:02.680 --> 01:07.180 Now you may also notice that the rest of my settings changed ever so slightly I had a bit of a computer 01:07.200 --> 01:11.050 hiccup but I needed to restore everything. 01:11.050 --> 01:14.330 So there may be some add ons that I need to re-enable etc.. 01:14.470 --> 01:17.710 But back to basically the standard default layouts here. 01:17.710 --> 01:22.840 Now speaking of add ons we need to go to our user preferences and enable the cell fracture. 01:22.840 --> 01:28.270 So once you're in the user preferences go to the add ons tab along the top in the search field on the 01:28.270 --> 01:31.290 top left there of which typing cell. 01:31.450 --> 01:37.540 We will have the option here object cell fracture puts a tick in the little check box then I recommend 01:37.540 --> 01:44.900 you press Save user settings so that this particular add on comes on every time you start blender. 01:45.250 --> 01:45.930 Okay. 01:46.000 --> 01:47.370 Now how do you access it. 01:47.410 --> 01:50.230 Well there are a couple of ways it should now be added to the tool shelf. 01:50.230 --> 01:56.800 If we scroll down there's a button that says cell fracture with an object selected or objects you can 01:56.800 --> 02:00.220 just hit cell fracture and it will come up. 02:00.220 --> 02:02.060 Now I'm not going to do it that way. 02:02.080 --> 02:04.130 I am going to skate to get rid of it. 02:04.150 --> 02:11.020 I'm going to use the space menu for searching in the 3D editor and type in cell and there it is. 02:11.020 --> 02:16.690 And that will enable me because blender remembers what you searched for last to come out changed the 02:16.690 --> 02:22.050 settings and literally press space and enter and bring this back up every time. 02:22.270 --> 02:29.140 Now it does pop up kind of in the way does it pop up whether 3D cursor is by any chance. 02:29.230 --> 02:30.880 Might do might come up on the edge. 02:30.880 --> 02:31.470 I'm not sure. 02:31.570 --> 02:33.100 But either way there we go. 02:33.100 --> 02:33.980 That's up. 02:34.090 --> 02:36.850 And oh my word there are a lot of options here. 02:36.850 --> 02:38.600 What did they all mean. 02:38.650 --> 02:44.860 We'll go through them individually kind of as we're going through would be a bit jumpy up and down this 02:44.860 --> 02:49.430 list and we'll reveal things as they become more important. 02:49.450 --> 02:56.490 First of all let's have a play or let's have a look at what options we've got along the top here. 02:56.530 --> 03:01.650 We've got a point source of this tells blender where my fracturing from. 03:01.650 --> 03:03.430 What am I using. 03:03.430 --> 03:11.290 So we've got the option of own verses which are the verses that are of that object we've got child vertices. 03:11.380 --> 03:19.130 Okay so if this object has any children will be using the vertices of that chip or of those children. 03:19.150 --> 03:20.860 There are more than one next. 03:20.920 --> 03:23.670 We have own particles and charged particles. 03:23.680 --> 03:29.020 As you can probably tell they are to do with the particle system that it has or any of its children 03:29.020 --> 03:29.660 have. 03:29.680 --> 03:35.080 Now we're not going to use those in this particular ammit discussion on the cell fracture as we've already 03:35.110 --> 03:37.150 played with the particle system. 03:37.150 --> 03:39.530 Feel free to play with that yourselves. 03:39.550 --> 03:47.290 We also have the grease pencil as well so we can actually draw and help guide this tool where we wanted 03:47.320 --> 03:48.610 to fracture. 03:48.610 --> 03:50.740 So let's actually start fracturing something. 03:50.740 --> 03:56.500 What happens if we go to Owen Virts because that's the only real option we've got at the moment and 03:56.500 --> 03:58.390 we're going to leave recursive alone. 03:58.480 --> 04:05.170 And in general if you're running a physics simulation recursive can cause you a lot of problems especially 04:05.170 --> 04:08.230 when it comes to things spontaneously exploding. 04:08.230 --> 04:14.460 We don't want that meshed data we may need to tweak this Slider here. 04:14.460 --> 04:18.710 This value which if we hover over it says the gaps for fracture. 04:18.820 --> 04:22.080 So occasioning you need to make the gaps bigger. 04:22.450 --> 04:27.670 And as it says there to give more stable physics that's how you really avoid things exploding if you 04:27.670 --> 04:30.490 start cutting them up into smaller amounts. 04:30.490 --> 04:33.960 Now physics and volu Well that's absolutely fine. 04:34.240 --> 04:37.570 It's going to give all the bits that it breaks into a mass of one. 04:37.570 --> 04:42.880 Now that can be problematic if you got small pieces that weigh the same amount as larger pieces it's 04:42.880 --> 04:47.680 going to look pretty odd especially if you've broken up one object because all of a sudden you've got 04:47.680 --> 04:51.890 a small piece that weighs as much as potentially the whole object to begin with. 04:51.970 --> 04:53.850 That's going to look very odd. 04:53.950 --> 04:59.200 Now when you break things up into individual mesh objects they're all going to have origins and this 04:59.200 --> 05:05.350 make sure this setting that's already tic's recentre make sure that the actual origins are all at the 05:05.350 --> 05:12.580 centre point of all of those objects and will look at making the weights more logical as well in a few 05:12.580 --> 05:13.330 moments. 05:13.390 --> 05:15.210 The scene now this is important. 05:15.220 --> 05:21.370 This next layer thing is through me the first time I started using cell fracture it means that when 05:21.370 --> 05:27.040 we actually run the operation which will do momentarily it puts the way that it's broken it up it puts 05:27.040 --> 05:29.800 all of those objects onto another layer. 05:29.800 --> 05:32.090 In fact it puts them on the next layer. 05:32.110 --> 05:33.420 So in this case we're on layer 1. 05:33.430 --> 05:37.150 They would appear on late too and finally show progress. 05:37.270 --> 05:43.210 I like having the show progress on because it basically means you can see where the blender has crashed 05:43.210 --> 05:43.810 or not. 05:43.990 --> 05:50.650 And this is one of these operations that can either crash or you get a value wrong and it blows everything 05:50.680 --> 05:57.280 to pieces which we don't want and I don't mean blow it to pieces as in the physics engine it shatters 05:57.280 --> 05:58.170 all over the place. 05:58.180 --> 06:02.410 I literally mean I made a mistake earlier whilst recording one of these videos. 06:02.620 --> 06:03.530 And ah. 06:03.570 --> 06:08.890 It would have taken about six hours to actually do the calculations it hadn't locked up blender but 06:08.890 --> 06:13.480 it was going to take quite a while to do and event dealt with something like 2 million polygons in my 06:13.480 --> 06:16.330 scene which is just obscene for a basic cube. 06:16.540 --> 06:19.800 Okay so let's go ahead and just click okay and see what happens. 06:19.900 --> 06:24.400 Okay so let's go to the second layer and let's have a look at the outline as well. 06:24.400 --> 06:30.490 So we've got the cube cell all the way down to seven but it starts at zero here. 06:30.490 --> 06:34.930 So that means we've got eight chunks and we had eight vertices to begin with. 06:35.020 --> 06:37.180 Okay that kind of makes sense. 06:37.180 --> 06:44.320 And now let's just add physics to this without gravity so that's going to save my scene in a second 06:44.320 --> 06:47.610 no gravity and going to apply physics. 06:47.620 --> 06:52.600 Going to make sure selects everything to give us something to add and active to the mall and a save 06:52.600 --> 06:56.050 that in my Am I in my prototypes. 06:56.070 --> 06:56.850 Yes I am. 06:57.070 --> 07:05.950 And I'm going to call this what I call and I call it cell fracture basic cube just so I know what's 07:05.950 --> 07:06.800 going on. 07:06.960 --> 07:07.370 Okay. 07:07.540 --> 07:08.370 So let's run this. 07:08.470 --> 07:11.000 This animation and it doesn't fly apart. 07:11.020 --> 07:13.900 That is something that you should check early on. 07:14.050 --> 07:18.520 If you've made something too detailed or perhaps use recursion. 07:18.520 --> 07:20.750 You may end up with your model flying parts. 07:20.790 --> 07:22.450 Okay so that's a good start. 07:22.450 --> 07:24.640 It's not self destructing on us. 07:24.670 --> 07:31.400 And indeed if we were to lift it up slightly and add a ground plane. 07:32.740 --> 07:39.120 And scale that up and give that passive what we should find is a return gravity back on and just run 07:39.340 --> 07:42.630 that we didn't move it on frame one. 07:42.720 --> 07:43.320 There we go. 07:43.350 --> 07:45.420 It's broken into its various pieces. 07:45.420 --> 07:45.980 Brilliant. 07:45.990 --> 07:49.290 But that's not a very convincing break and yes it was. 07:49.290 --> 07:52.740 I was going to say a Rubik's Cube a Rubik's Cube has more parts than that. 07:53.010 --> 07:57.720 So let's start playing with how many pieces it breaks into. 07:57.720 --> 07:59.760 So I'm just going to reset I'm not going to play anything. 07:59.760 --> 08:05.040 One of the things I do recommend is you pause and rewind right back to the beginning if you start altering 08:05.040 --> 08:05.700 anything. 08:05.700 --> 08:11.190 In fact in this case I'm literally just going to hit the UNDO key several times until we get rid of 08:11.250 --> 08:15.120 all of this lot so back to our basic cube function to redo there. 08:15.130 --> 08:17.140 So I'm back to this position. 08:17.370 --> 08:24.000 Okay space and end so bring up my mesh tools here my fracture tools. 08:24.000 --> 08:29.010 So we've got this source limit here that controls how many pieces it's going to break into. 08:29.010 --> 08:35.800 So if I set that down to six or even let's say five let's go for five pieces. 08:35.800 --> 08:40.430 I when I click okay here I'd expect to see here we go zero to four. 08:40.440 --> 08:41.440 Perfect. 08:41.460 --> 08:46.350 And of course when we have a closer look at the object we can see it's been broken into different shaped 08:46.380 --> 08:47.640 pieces. 08:47.850 --> 08:49.110 Actually I quite like that. 08:49.110 --> 08:53.480 So you can play with that and get some decent breakages. 08:53.490 --> 08:59.650 Now there are some other options that you can do around here so let's just undo that back to before. 08:59.670 --> 09:00.570 There we go. 09:00.710 --> 09:02.470 I'm going to hit space and enter again. 09:02.520 --> 09:04.620 Let's have a look at the other options. 09:04.620 --> 09:09.420 We can do so we can actually include recursion and I'll show you what that does. 09:09.420 --> 09:14.430 Now one of my favourite bits with this is you can set it around the cursor for instance and I'm going 09:14.430 --> 09:18.010 to turn up recursion to maybe four or five. 09:18.010 --> 09:19.410 Don't go nuts with this. 09:19.410 --> 09:23.020 If you do it will take ages to calculate. 09:23.570 --> 09:30.090 And here we have the like likelihood of recursion so we can up that a little as well if you want. 09:30.090 --> 09:31.900 Now there is a clamp here. 09:32.340 --> 09:38.540 So it does stop at a certain point because here we go. 09:38.580 --> 09:45.810 It prevents it reaching an s silly amount so won't recur go back down its chain basically more than 09:45.870 --> 09:48.040 a 250 times in this case. 09:48.090 --> 09:52.800 So let's just click okay and we can see that it breaks apart and it goes into each beer and breaks those 09:52.810 --> 09:55.270 apart individually. 09:55.290 --> 10:01.730 Now blender can take a while to do this and I would recommend just being careful when you do do it. 10:01.730 --> 10:03.630 So let's go to Layer 2 and see what's happened. 10:03.630 --> 10:09.330 Okay so it's broken a lot around the base and less around the top. 10:09.360 --> 10:09.960 Brilliant. 10:10.110 --> 10:14.150 So what that means now is that it will smash up into smaller pieces around it. 10:14.280 --> 10:20.250 Let's have a look at the settings I have because I had it set cursor here closer to the cursor means 10:20.250 --> 10:24.740 that because the cursor was on the very bottom where it actually doesn't matter where the cursor was. 10:24.770 --> 10:29.450 Just close once of a cursor get broken up into smaller pieces. 10:29.460 --> 10:36.370 I could have gone for random small big or far away from the cursor and the press Escape. 10:36.390 --> 10:36.940 Never Press. 10:36.940 --> 10:42.600 Okay if you've already got a lot of objects easy and I'm gonna add active to all of these pieces while 10:42.600 --> 10:47.620 I've got them Selecta them asking to turn off gravity and see if it's going to blow itself apart. 10:48.830 --> 10:51.500 Hey it looks like it's not going to that's great. 10:51.500 --> 10:58.430 I'm now going to reset the animation pull it up and actually add in that ground plane that we had before 10:58.430 --> 11:04.730 scaled that up hit passive on that so it's got something to impact under the term gravity back on. 11:04.940 --> 11:09.410 And now we'll see when it hits the ground it breaks into lots of small pieces. 11:09.410 --> 11:10.640 How cool is that. 11:10.640 --> 11:13.960 I absolutely love playing with this tool. 11:14.120 --> 11:19.520 And of course it was the animations playing let's say we turn gravity off and rewind. 11:19.640 --> 11:25.700 We can grab a piece and start knocking it apart so you can get in sort of a feeling of how this is going 11:25.700 --> 11:26.320 to work. 11:26.330 --> 11:28.700 And if you let it ah missed it. 11:28.700 --> 11:31.070 I'm not sure I can impact from here. 11:31.070 --> 11:32.180 That's one of the dangers. 11:32.180 --> 11:38.930 By the way of annamay moving it whilst it's animating I've accidentally moved this particular sub part 11:38.930 --> 11:44.210 of it to another location so I'm just going to have to undo until it's back into the right place and 11:44.210 --> 11:45.730 hopefully there we go. 11:46.220 --> 11:52.610 Unfortunately you can't wave something about when it's there when it's not being animated so we just 11:52.610 --> 11:53.540 press play here. 11:53.690 --> 11:58.300 It looks like in this case recursion has not caused it to blow itself apart. 11:58.460 --> 12:00.020 Occasionally it does. 12:00.050 --> 12:02.460 Do be careful when you're using it. 12:02.690 --> 12:03.570 Okay. 12:03.710 --> 12:11.750 Now that's got us all set up now ready for a challenge and your challenge is exploding bricks. 12:11.780 --> 12:19.100 So in your wall animation have some of your brick work break into much smaller pieces and ideally they 12:19.100 --> 12:22.240 should break up when the projectile hits the wall. 12:22.420 --> 12:24.970 Pause a video now and give that a go. 12:27.090 --> 12:28.510 Okay guys welcome back. 12:28.560 --> 12:32.150 Let's go explodes and bricks into some much smaller pieces. 12:32.220 --> 12:33.410 Over in blender. 12:34.260 --> 12:40.840 Okay so I've gone ahead here and opened up my wall and let's just make sure it's still behaving as would 12:40.840 --> 12:43.330 expect it to boom straight through. 12:43.440 --> 12:43.920 Okay. 12:44.070 --> 12:45.780 Some scan of these select everything here. 12:45.810 --> 12:50.820 Go back to the very beginning frame and whizzed round to the front and do some selecting. 12:50.820 --> 12:56.130 Now you do need to be careful in selecting because we can actually see this object for projectile through 12:56.130 --> 12:56.940 the wall. 12:56.940 --> 13:02.130 What we don't want to accidentally do is end up grabbing that as well and do whatever we want to do 13:02.130 --> 13:04.710 to fracturing this wall so that by accident. 13:04.710 --> 13:08.240 So I'm going to hide my projectile for the moment completely from the scene. 13:08.240 --> 13:13.760 I'm going to hold down control as I do that to hide the forcefield that's attached to it as well. 13:13.770 --> 13:18.930 Now one of the things that I noticed when I was round is one of these bricks is a bit awkwardly placed. 13:18.930 --> 13:21.950 I must have moved it when running a physics simulation. 13:22.950 --> 13:30.180 Someone is going to pop it roughly back in the right place and on and from here start selecting my objects. 13:30.570 --> 13:35.870 So as the projectile comes in is going to knock several of these. 13:36.220 --> 13:37.840 I am absolutely flying. 13:37.970 --> 13:44.400 I'll have to keep it particularly simple I don't want to get to air exaggerated at this point. 13:44.400 --> 13:50.180 I want to see proof of concept if you will a one to make sure it works before going crazy with it. 13:50.400 --> 13:55.440 So the first thing I need to do is fracture those and I'm going to do a simple fracture I'm not going 13:55.440 --> 13:57.970 to do any recursive or anything along those lines. 13:58.110 --> 14:00.340 So I want to make sure the whole process works. 14:00.480 --> 14:04.050 So I'm going to go ahead of select the ones I want to break into multiple bits. 14:04.050 --> 14:10.290 And I'm going to click okay and that should give us absolutely loads of little bits. 14:10.300 --> 14:15.750 Just wait for it to go through and once it's finished doing that's what I'll do is I'll apply all of 14:15.750 --> 14:18.070 those which should now be on lyoto. 14:18.080 --> 14:23.310 Perfect and select them all these select to reselect that make sure that anything else that's selected. 14:23.310 --> 14:26.990 In fact we have still got something selected on another layer. 14:27.000 --> 14:31.180 So let's just make sure there's nothing selected there and just these are selected. 14:31.560 --> 14:39.780 I'm going to click to put air the 3D cursor near here and found an ego shift in S and cursed selected 14:39.780 --> 14:41.370 to put it smack bang in the middle. 14:41.580 --> 14:43.390 And I'm going to add an empty. 14:44.550 --> 14:50.760 Doesn't matter what type of intimate's come to use a plain sison and a name that's broken bricks. 14:50.760 --> 14:54.250 So I have some control broken bridges. 14:54.270 --> 14:55.190 Okay. 14:55.320 --> 14:57.010 That's how I feel some titans. 14:57.020 --> 14:58.560 Okay broken bricks. 14:58.740 --> 15:03.750 And finally I'm going to select everything broken bricks should now be the active. 15:03.750 --> 15:05.420 Yes is control and pay. 15:05.630 --> 15:10.440 We're going to parents all of these broken bricks and that also means I can select them quickly as well. 15:10.740 --> 15:16.170 Now we're going to be applying physics Savvis we might as well borrow the physics we've already got 15:16.170 --> 15:23.590 set up so I'm going to select one of the other bricks and go to the physics selection and just go to. 15:24.690 --> 15:25.980 Let's see what we've got here. 15:25.980 --> 15:30.210 Copy from active that's why once and now they got physics applied to them. 15:30.210 --> 15:33.190 Let's just run this animation and see what happens. 15:33.210 --> 15:33.730 Okay. 15:33.930 --> 15:35.550 They blow each other apart. 15:35.550 --> 15:39.430 The main reason for that is we've still got bricks inside bricks. 15:39.480 --> 15:45.660 So all of these extra bricks that we have are inside the original bricks causing this problem. 15:45.810 --> 15:49.900 So we need to go through and literally delete the ones we don't want anymore. 15:50.250 --> 15:56.930 So looking at what we've got here I'm just going to skip between the two with the one and two keys. 15:56.940 --> 16:00.250 And I think I'm just going to have to manually select. 16:01.190 --> 16:01.770 Hoover as well. 16:01.760 --> 16:07.580 So there we go those are those ones gone I hope I haven't deleted anything else which should mean now 16:07.580 --> 16:09.430 we can rebuild the wall. 16:09.650 --> 16:10.790 Excellent. 16:10.790 --> 16:14.210 And going to unhide that projectile and just see how it's working. 16:14.210 --> 16:19.700 This is being lean about it this is making sure that the actual scene itself is working at each individual 16:19.700 --> 16:20.630 stage. 16:20.690 --> 16:24.920 Okay so that is working it's not all the forcefield apply to it at the moment but that's fine. 16:24.920 --> 16:30.340 We can add it in by moving them to the other layer and we can do that straight away. 16:30.380 --> 16:35.250 But it is falling apart so that one problem at a time it's not being affected by the forcefield. 16:35.300 --> 16:39.190 We can do later on but it falling apart straight away. 16:39.320 --> 16:45.170 To be expected of course is not that great so we want it to fall apart on our command. 16:45.170 --> 16:50.720 So we need to keep that in some select one of these objects and just make sure it works with one of 16:50.720 --> 16:51.760 them to begin with. 16:51.920 --> 16:57.600 So we want to in the rigid body toggle animation on and off much work like we did with the projectile. 16:57.680 --> 17:00.910 So I'm going to toggle the animated here. 17:00.980 --> 17:08.210 We want it on initially at frayne's 0 saying turn it on and press won over the animated a lot of go 17:08.210 --> 17:16.760 surfing it was frame 20 so were impax am going to go to 22 and actually key in the factor that's turned 17:16.820 --> 17:17.760 off. 17:18.080 --> 17:23.270 And what we should get there is this bit staying still and then being knocked out at 20 to perfect. 17:23.270 --> 17:24.890 That's exactly what I want. 17:24.890 --> 17:29.550 Now we need a copy that's everything else something to select everything else with the a key. 17:29.720 --> 17:36.830 And now we need to make links to the animation data so controlled an L animation data and what we should 17:36.830 --> 17:40.920 find is that now stay still and then it gets knocked through and crumbles. 17:41.030 --> 17:43.690 Perfect is not the best looking at the moment. 17:43.730 --> 17:48.680 So the final thing here I say final There's always another thing to be done afterwards. 17:48.740 --> 17:51.290 The penultimate perhaps I don't know. 17:51.290 --> 17:54.470 So we're going to move all of those to layer 1. 17:54.860 --> 17:59.090 Now that they're on layer 1 they should also be affected by that forcefield. 17:59.090 --> 18:02.190 So let's rewind press play. 18:03.590 --> 18:06.400 Oh but something weird is happening there. 18:07.440 --> 18:12.710 I'm just gonna save my work and reload my screen reverts. 18:12.900 --> 18:13.620 I don't know. 18:13.650 --> 18:14.350 There we go. 18:15.790 --> 18:16.720 Boom. 18:16.900 --> 18:18.110 Excellent. 18:18.880 --> 18:19.650 That's it. 18:19.650 --> 18:24.340 There were I couldn't have asked for anything better there perhaps a smaller explosion since there. 18:24.340 --> 18:28.220 If we imagine where the camera's going to be most of those bricks. 18:28.360 --> 18:29.800 Well at disappearing off. 18:29.790 --> 18:35.430 So again a little bit of refinement at this stage just to get more or less what you want. 18:35.460 --> 18:39.930 A couple of bricks that seem to be staying still and they stay completely still. 18:40.010 --> 18:46.100 There are a couple of bricks here that seem to have completely given up with being part of our world. 18:46.180 --> 18:47.240 Let's just watch this. 18:47.260 --> 18:48.520 Boom it's coming in. 18:48.520 --> 18:54.220 So we just need to go into that forcefield and the animation for the forcefield and perhaps not have 18:54.220 --> 18:58.730 it here it goes from zero to 5000 back down to zero. 18:59.410 --> 19:00.690 Sorry 50000. 19:00.700 --> 19:03.270 So let's lower that down to 20000. 19:03.310 --> 19:06.700 Remember to keep it in other ways it won't work and just test it. 19:06.790 --> 19:08.770 And again do little things at a time. 19:08.800 --> 19:10.420 And that is much better. 19:10.420 --> 19:15.800 You gather up as it goes apart yes these broken bricks aren't the best looking in the world. 19:15.820 --> 19:22.780 I'm going to increase the frame count here to 100 to watch everything collapse and I'm going to sort 19:22.780 --> 19:25.060 out these other bricks in my own time. 19:25.060 --> 19:26.450 You get the gist of it. 19:26.500 --> 19:27.250 How are you. 19:27.280 --> 19:32.840 How are you guys getting on with your explosive walls and bits breaking into various pieces. 19:32.850 --> 19:35.590 We'll be having fun with this I'm having lots of fun. 19:35.590 --> 19:36.210 Please do. 19:36.210 --> 19:39.920 Share your work over on the forum I love seeing what you guys come up with. 19:40.060 --> 19:42.660 And I will see you in the next lecture.