WEBVTT 00:00.390 --> 00:03.170 Welcome to your first particle system. 00:03.830 --> 00:09.980 In this video you will create a particle system understand children and how they relate to their parents 00:10.340 --> 00:15.970 and hopefully avoid crashing your computer or waiting a very long time. 00:16.190 --> 00:19.050 So let's hop straight on over in a blender. 00:19.550 --> 00:20.280 Okay. 00:20.330 --> 00:23.800 So we're back over in blender and we have our rabbits in front of us. 00:23.810 --> 00:27.710 So the first thing I'm going to do is open up a brand new blender fine because what I don't want to 00:27.710 --> 00:31.160 do is start playing about with our model just at this moment. 00:31.160 --> 00:34.970 I want to learn the technique of the particle system. 00:35.090 --> 00:36.950 So make sure your file is saved. 00:36.950 --> 00:38.630 I'll do that now for mine. 00:38.630 --> 00:41.170 And we're going to open up a brand new blender file. 00:42.470 --> 00:42.780 Great. 00:42.770 --> 00:48.220 So we've got the default cube in front of us and we need to add our first particle system. 00:48.290 --> 00:56.030 So if I pull out this area here on the left hand side we will see that we have these things that look 00:56.030 --> 00:59.830 like stars are just bring down the outline as well. 00:59.930 --> 01:02.890 And that is a particles as we go over it. 01:02.900 --> 01:08.600 We can see that so when we click on that we get a blank screen because there is no particle system at 01:08.600 --> 01:09.160 the moment. 01:09.170 --> 01:09.710 So go ahead. 01:09.720 --> 01:16.610 Going to go ahead and create a new particle system and I'm going to call it Hey 3q. 01:17.260 --> 01:18.110 Excellent. 01:18.110 --> 01:24.500 And I'm going to here on the settings also call it hairy cubes so I know that what I'm setting up here 01:24.980 --> 01:31.920 and we can use this as a base to generate more particle systems from once we've got it roughly right. 01:31.940 --> 01:38.160 So type Well we're not going to do an emission at the moment we're going to do a hair. 01:38.180 --> 01:43.280 So we're going to switch that across to here and lo and behold we've got ourselves some hairs coming 01:43.280 --> 01:45.210 out of our cube quite long hairs. 01:45.380 --> 01:52.790 And if we go out and render that it will look quite dim at the moment so let's go to the lamp and make 01:52.790 --> 01:55.820 the lamp properties give it a sun so it's nice and bright. 01:55.880 --> 01:56.240 There we go. 01:56.240 --> 02:03.190 So you get a better idea of what it's going to look like and there are a thousand hairs in this scene. 02:03.560 --> 02:09.280 Now there is a fine balance to be struck so let's go back to the cube and the oh just whilst we're hearing 02:09.290 --> 02:13.430 you've got a spanner against there and not a sparkly icon. 02:13.610 --> 02:18.170 Well the particle system is a modifier. 02:18.170 --> 02:25.700 But as you can see here the settings are done over here rather than in the usual way that you manage 02:25.760 --> 02:26.440 modifiers. 02:26.540 --> 02:30.490 So if we click on the particle properties we can carry on going down here. 02:30.490 --> 02:35.750 Now advance does give you further options and we're not going to deal with that at the moment and segments 02:35.780 --> 02:43.940 tells us how many kinks in this hair will actually be the more segments you have the more smooth you 02:43.940 --> 02:46.420 can comb hair have it deform etcetera. 02:46.570 --> 02:51.670 But I would suggest you leave out five more segments you have the more computationally heavy. 02:51.680 --> 02:54.280 It's going to be to calculate that here. 02:54.470 --> 03:00.590 Now the emission down here tells us the number of hairs and we can see that there are 1000 hairs and 03:00.590 --> 03:04.500 the hair length pretty self-explanatory is the length of a hair. 03:04.510 --> 03:08.900 I'm going to go back to solid view here and the hair length. 03:09.020 --> 03:14.210 If we pull that down we get a hairy cube still but not quite as hairy. 03:14.210 --> 03:20.330 And depending on what you're modelling you will want a certain length of hair of course. 03:20.330 --> 03:26.750 Now if we go down we're going to ignore hair dynamics for the moment how we're going to ignore the random 03:26.750 --> 03:29.320 stuff we'll go back to that in a bit. 03:29.450 --> 03:32.230 And as we come down we can see children. 03:32.720 --> 03:39.380 So if we go to children and we've got two options for the type of children now the best way of demonstrating 03:39.390 --> 03:41.840 interpolated is not on a cube. 03:41.990 --> 03:46.750 So I will create another object in a moment and we're have a closer look at that. 03:46.820 --> 03:51.550 But simple and elated are going to look pretty similar. 03:51.830 --> 03:54.930 Oh actually that's quite nice around the edge of the cubes. 03:54.950 --> 04:02.510 So it does give us an idea of what impeller interpolated does rather than just being simple. 04:02.570 --> 04:08.700 So the way that the simple hairs are generated is they are created around the parents. 04:08.720 --> 04:15.200 So in this case on the display setting you can see we've got 10 children for each individual parent 04:15.200 --> 04:22.400 or for each individual emission no at the top here so that's taken our total up to 10000 hairs on the 04:22.400 --> 04:22.760 screen. 04:22.760 --> 04:28.010 In fact I'm just going to move these up so I can see in fact you can grab bees by the way and move them 04:28.010 --> 04:29.570 about so I'm going to lift that up. 04:29.750 --> 04:34.940 So they're right next to one another so you can see what's going on on both of these. 04:35.030 --> 04:42.640 So the number of children when it's simple it's they're produced within a radius around our our primary 04:42.650 --> 04:44.470 hair are mission hair. 04:44.600 --> 04:50.420 And that can lead to things like this where the hairs are being generated a way from the skin or the 04:50.420 --> 04:52.190 surface of your model. 04:52.190 --> 04:57.980 And that's generally okay if you've got a large flat area and no one's going to notice. 04:58.130 --> 05:03.170 But if you start having hairs coming out there's blatantly no skin. 05:03.200 --> 05:05.510 With the case of our rabbit is going to look a bit odd. 05:05.660 --> 05:07.860 So you'll actually want to use interpolated. 05:08.180 --> 05:15.050 And this does do a good job at showing it as the hairs come round this corner. 05:15.050 --> 05:21.230 You can see that they're still stuck to the surface of our model and they follow the corner as it goes 05:21.230 --> 05:25.850 round rather than just leaving it with a 90 degree cross-section there. 05:25.850 --> 05:31.430 So that's a very powerful way in the same as they come around this corner all these three edges where 05:31.430 --> 05:32.150 they meet. 05:32.270 --> 05:35.310 It's nice and divided as it goes. 05:35.330 --> 05:41.200 Now do be warned the multiplication of this emission number and the display. 05:41.260 --> 05:41.870 No. 05:41.920 --> 05:47.620 If it gets too high will either crash your computer or take ages to calculate. 05:47.620 --> 05:53.530 So I went and put a thousand in here and I hope it doesn't muck up whilst doing a live video. 05:53.530 --> 05:55.020 I get my spinning wheel. 05:55.180 --> 06:00.520 I've done this before I know it's going to work but I may have to pause a video or at least speed it 06:00.520 --> 06:02.080 up whilst that goes through. 06:02.080 --> 06:06.440 But that's now going to have a million hairs in it a thousand times. 06:06.550 --> 06:14.590 So each one of those original admissions the parents will have a thousand hairs associated with it. 06:14.710 --> 06:18.220 So that is quite a lot of hairs. 06:18.220 --> 06:22.740 Now the other thing that makes a difference is the scale of our object. 06:22.750 --> 06:26.800 Now it sounds a bit odd that it would make a difference but if you think about it if you've got a thousand 06:26.800 --> 06:33.070 hairs on something the size of a marble compared to a 1000 hairs on something the size of a football 06:34.090 --> 06:39.140 they're going to be less dense on the football because it's got a large area to cover. 06:39.250 --> 06:45.940 So in general the larger your object is the more hairs you're going to need or the not more particle 06:45.970 --> 06:51.850 you're going to need to cover that with the same density as you would if it was a smaller object. 06:51.910 --> 06:57.490 And I think I've done a wonderful job here in showing you not the numbers to type in specially when 06:57.490 --> 07:03.310 doing a video for you guys but you can see here that the program hasn't crashed. 07:03.400 --> 07:09.520 It's simply taking a very long time to calculate 1 million hairs and that's what you don't want to happen 07:09.550 --> 07:12.370 especially when youre mucking around with a blender. 07:12.370 --> 07:18.070 Now this generally happens to me when Im playing with the number and I go back and I change the admission 07:18.100 --> 07:23.840 no forgetting I have left the children high or the mission numbers already high and I add a large number 07:23.940 --> 07:29.950 of the children so do be careful whenever you do that and I'm probably going to force quick blender 07:29.950 --> 07:32.070 here and be right back with you. 07:33.210 --> 07:39.930 In fact I can see here in my activity monitor you can use your task manager that it's actually it's 07:39.930 --> 07:42.820 actually using 100 percent of the s.p. you at the moment. 07:42.840 --> 07:51.240 Now this is one of those things that it's not multi core compatible unlike rendering which is the actual 07:51.240 --> 07:52.400 generation of the hairs. 07:52.390 --> 07:58.020 It's only done on one core of your s.p. you so it's not going to be as fast as some of the other things 07:58.020 --> 07:58.510 you've been doing. 07:58.500 --> 08:01.400 Glenn and I can see here it's actually still working all of that out. 08:01.470 --> 08:02.790 But to be quite honest I don't care. 08:02.790 --> 08:07.810 I want to carry on teaching you guys so I'm going to quit that and build up my cube again for you. 08:08.250 --> 08:14.670 So here I am just recreating where we were before but without the one million hairs and I'm just going 08:14.670 --> 08:19.090 to click this little handle here and pull it up so it's next to. 08:19.830 --> 08:26.040 This area here and of course if we add some simple children there were only 10 that gets a bit thicker 08:26.070 --> 08:32.670 that's dragged the hair length back down to about here change it interpolated and we get a much better 08:32.670 --> 08:37.380 idea of what's going on now in terms of numbers. 08:37.380 --> 08:40.020 In general you will have to play with it. 08:40.110 --> 08:48.660 If I now scale this cube outward so it's 15 times larger than it was before the hairs are now ridiculously 08:48.660 --> 08:51.750 short for this style of model so we'd have to increase them. 08:51.750 --> 08:56.510 So it looks roughly the same but now they're far less dense and the same is true. 08:56.520 --> 09:02.960 If I were to scale that right in oh dear that's I don't know how small of actually made that. 09:02.950 --> 09:05.790 Let's bring those all in. 09:05.790 --> 09:08.910 All right we've got a tiny cube So let's zoom in. 09:08.910 --> 09:10.720 Now the hairs are much more dense. 09:10.800 --> 09:14.500 And you'll notice that we've got a display number and a random number. 09:14.580 --> 09:21.510 So at the moment if we were to not hear if we go into random mode here that is still the same number 09:21.990 --> 09:23.730 that's on this display here. 09:23.730 --> 09:31.380 But if we go to render and render out the image it will do a lot of calculations and then it will render 09:31.380 --> 09:34.460 with the cube at once with 100 hairs on it. 09:34.620 --> 09:37.710 And you can probably see that's very pixellated carcillo rest. 09:37.740 --> 09:41.390 But there are many more hairs in there than there are otherwise. 09:41.400 --> 09:46.210 So in general your wants the children set to interpolated. 09:46.590 --> 09:50.030 And the number of emissions where you going to have to play with that. 09:50.100 --> 09:53.150 But do be careful that you do not crash your system. 09:57.390 --> 09:59.180 Okay guys it's Challenge time. 09:59.190 --> 10:02.060 I'd like you to create hair for your bunny. 10:02.070 --> 10:08.910 So give our bunny some fur apply a hair particle system to the rabbit mash. 10:08.910 --> 10:11.960 Don't worry about the detail of it just yet. 10:12.180 --> 10:14.800 And your bunny will look funny at this stage. 10:14.880 --> 10:15.700 Don't worry. 10:15.750 --> 10:18.130 We'll be sorting that out soon. 10:18.210 --> 10:22.110 So pause the video now and create hair for your bunny. 10:23.550 --> 10:24.240 Okay guys. 10:24.240 --> 10:25.160 Welcome back. 10:25.320 --> 10:28.450 Let's hop over into blender and create some bunny fur. 10:29.180 --> 10:36.290 Okay so we're back in blender Let's go ahead and open up if you've not done already your fluffy bunny 10:36.290 --> 10:39.890 and it's not that fluffy at the moment so let's make it a fluffy bunny. 10:39.890 --> 10:47.120 So I need to pull this out so I can see what's going on at a particle system and I'm going to call mine 10:47.140 --> 10:48.590 a body hair. 10:50.330 --> 10:52.500 I'm going to call this body hair as well. 10:56.360 --> 10:58.210 Cain changed the type to hair. 10:58.310 --> 11:00.080 And that's really long hair. 11:00.080 --> 11:03.750 So let's lower that back down to. 11:03.910 --> 11:09.190 We do point to for the moment that looks a decent length okay. 11:09.350 --> 11:11.320 But it's pretty sparse at the moment. 11:11.340 --> 11:17.520 We'll turn on the other layers that we have because otherwise when I render they won't appear to just 11:17.540 --> 11:20.620 render that image and see how it comes out of the camera isn't position. 11:20.630 --> 11:24.330 But we can see there that the hairs unno good at all. 11:24.380 --> 11:28.700 So let's give it some thicker fur without crashing the computer. 11:29.000 --> 11:37.400 So let's head back over to the 3-d view and let's try 10000 hairs right that's starting to look a bit 11:37.400 --> 11:37.700 better. 11:37.700 --> 11:45.510 That's a good you kind of get a feeling after a while of what is a good overall hair density. 11:45.560 --> 11:50.340 Before you start adding children in so let's go down to children. 11:51.510 --> 11:58.110 And were you notice that this is in a different position to where it was before in the last example 11:58.110 --> 11:58.550 video. 11:58.650 --> 12:03.200 And that's simply because the positions of all of these are saved in the actual blend file itself. 12:03.210 --> 12:04.490 I'm not going to move this one up. 12:04.530 --> 12:07.050 I'm going to set it to interpolated. 12:07.440 --> 12:14.850 And we end up with a much thicker mesh and blenders just ever so slightly jerky for me at this point 12:14.850 --> 12:17.130 in time which is okay. 12:17.340 --> 12:21.540 I'm not bothered with that but I do want to just orientate the camera. 12:21.540 --> 12:23.460 So let's go to camera view. 12:23.700 --> 12:28.210 So when I do do any rendering so let's move it up a little. 12:29.670 --> 12:34.980 And probably just rotate it around a little as well so rotates well. 12:36.010 --> 12:37.270 That way would be fine. 12:37.270 --> 12:40.680 In fact the way I keep looking at it from would be even better. 12:41.640 --> 12:48.300 Move it down to about there and then move it again this time away from the camera. 12:48.540 --> 12:51.450 So let's see how that looks when we render it again. 12:51.480 --> 12:57.640 Being as lean as possible to try and get a good idea about how the end result is going to look. 12:57.780 --> 13:02.990 It's going to look pretty disastrous of course at the moment because we have not styled the hair colour 13:03.020 --> 13:06.130 the hair or anything else we'll get to that in a bit. 13:06.130 --> 13:08.450 And let's just see how this is coming out. 13:09.620 --> 13:12.640 Okay so that looks like a good level of fluff. 13:12.640 --> 13:17.050 What is important is that I can't see the skin underneath. 13:17.050 --> 13:21.180 So there we go we've got a good start for a fluffy bunny. 13:21.190 --> 13:27.380 The ears are certainly far too fluffy at the moment because they're not like that on a normal bunny. 13:27.400 --> 13:29.480 There's good space around the eyes. 13:29.590 --> 13:33.570 Head hair is not usually this long but we can deal with that as well. 13:33.580 --> 13:38.620 Let's skip around to my 3-d view and see in rendered form with 10 samples. 13:38.620 --> 13:40.750 That's skewed round to the light side. 13:42.120 --> 13:44.910 In fact I'm going to change the lamp type to a Hemi. 13:46.010 --> 13:52.580 Rather than anything else because then it's going to have a direction but it's also to brighten up our 13:52.580 --> 13:59.580 scene really well so we can see there we've got oh it looks like I'm missing the other I. 14:00.890 --> 14:02.350 Yes I am missing the other. 14:02.360 --> 14:10.300 So in this case I'm going to quickly go to where we've got sphere and call them eyes. 14:10.460 --> 14:17.990 I'm going to add a mirror modifier should have done this before and make the mirror object the rabbit. 14:17.990 --> 14:20.600 And we should end up with an eye on the other side. 14:20.600 --> 14:21.820 Perfect. 14:22.160 --> 14:25.820 Okay so this is looking good. 14:25.820 --> 14:31.100 We've got our rough rabbits formed not not quite there yet. 14:31.100 --> 14:37.760 We've got plenty of work to do left on are a bit going to go back to solid view and in certain places 14:37.760 --> 14:41.120 of course it does look like you're seeing through it but that's fine. 14:41.120 --> 14:44.780 That's because all the hairs are currently standing up on end. 14:44.780 --> 14:48.980 Now I think that is a good starting point. 14:49.010 --> 14:54.470 Most of these hairs in a bit will be transferred to here so we're going to do some more adjusting anyway. 14:54.680 --> 14:56.530 That is a great start. 14:56.690 --> 15:02.140 How do you guys get on how fluffy has your bunny ended up pretty sheraton's discussions. 15:02.180 --> 15:04.680 I will see you guys in the next lecture.