WEBVTT 1 00:00:00.000 --> 00:00:02.166 Welcome to Subdivision! 2 00:00:02.166 --> 00:00:06.166 In this video we're going to go through what subdivision is and 3 00:00:06.166 --> 00:00:10.166 also cover the dangers of subdivision. So let's hop over 4 00:00:10.166 --> 00:00:14.166 into Blender! Let's pick a 5 00:00:14.166 --> 00:00:18.166 very straightforward surface. Let's go for this one here. 6 00:00:18.166 --> 00:00:22.166 Now, when we have a look at this, we can go, 7 00:00:22.166 --> 00:00:26.166 once it's selected in Edit Mode as a face, because we're 8 00:00:26.166 --> 00:00:30.166 subdividing a face at this point. We can also subdivide an edge 9 00:00:30.166 --> 00:00:34.166 as well, it's simply going to cut it up equally. So 10 00:00:34.166 --> 00:00:38.166 on the Tool Shelf itself we have the Subdivide button there 11 00:00:38.166 --> 00:00:42.166 next to all of the other modifiers you can 12 00:00:42.166 --> 00:00:46.166 use, and we can also use the W key, which will bring up 13 00:00:46.166 --> 00:00:50.166 this Specials list and we can pick Subdivide. 14 00:00:50.166 --> 00:00:54.166 And we can see it's split it into four equal portions, 15 00:00:54.166 --> 00:00:58.166 height-wise and length-wise. Now down 16 00:00:58.166 --> 00:01:02.166 in the lower-left, the modifications the operations 17 00:01:02.166 --> 00:01:06.166 tool for the Subdivide, until we select away it will be there, 18 00:01:06.166 --> 00:01:10.166 and we can increase the number of cuts. Now you have to be incredibly careful, 19 00:01:10.166 --> 00:01:14.166 because this is exponential. If you divide..subdivide 20 00:01:14.166 --> 00:01:18.166 something too many times, you'll end up with Blender crashing 21 00:01:18.166 --> 00:01:22.166 on you or your computer grinding to a halt, so 22 00:01:22.166 --> 00:01:26.166 I wouldn't recommend going crazy with the subdivision. 23 00:01:26.166 --> 00:01:30.166 If you need more detail, in a certain area, like let's say this 24 00:01:30.166 --> 00:01:34.166 lower-left hand corner, go in and subdivide 25 00:01:34.166 --> 00:01:38.166 something else. So lower-left hand 26 00:01:38.166 --> 00:01:42.166 corner here. Let's go in and subdivide that and 27 00:01:42.166 --> 00:01:46.166 then subdivide that, rather than cutting the whole 28 00:01:46.166 --> 00:01:50.166 model up into smaller pieces. Although you'll get 29 00:01:50.166 --> 00:01:54.166 much better control it becomes far more fiddley to work with, the smaller 30 00:01:54.166 --> 00:01:58.166 your geometry gets or the more detailed it gets. 31 00:01:58.166 --> 00:02:02.166 So what would I like you to do? There's a challenge 32 00:02:02.166 --> 00:02:03.733 coming up! 33 00:02:03.733 --> 00:02:07.733 So I'd like you to create a doorway into the temple! 34 00:02:07.733 --> 00:02:11.666 Let's go and create that now! 35 00:02:12.066 --> 00:02:16.066 So the surface that I'm going to subdivide is this one 36 00:02:16.066 --> 00:02:20.066 here, this face, and I'm just going to subdivide it once, see 37 00:02:20.066 --> 00:02:24.066 where we get and subdivide it once more. 38 00:02:24.066 --> 00:02:28.066 There we go! So now we've got equal sides, and I'm 39 00:02:28.066 --> 00:02:32.066 going to select these here. 40 00:02:32.066 --> 00:02:36.066 And once they're selected, we can extrude them 41 00:02:36.066 --> 00:02:40.066 into our temple. I'm going to turn off snapping and just move that in. 42 00:02:40.066 --> 00:02:44.066 Now at any point, we can decide to add 43 00:02:44.066 --> 00:02:48.066 further geometry inside, but we do have to be careful. 44 00:02:48.066 --> 00:02:52.066 That is, if we make the inside here too detailed, 45 00:02:52.066 --> 00:02:56.066 it's going to look very odd compared to the outside. So if we were to, 46 00:02:56.066 --> 00:03:00.066 let's say, go in here and just make the doorway... 47 00:03:00.066 --> 00:03:04.066 Yep that's it! Let's push that in a little further, and then, 48 00:03:04.066 --> 00:03:08.066 in here make another doorway 49 00:03:08.066 --> 00:03:09.633 going off this way. 50 00:03:09.633 --> 00:03:13.066 And perhaps splitting this 51 00:03:13.066 --> 00:03:17.066 area here. Let's 52 00:03:17.066 --> 00:03:21.066 subdivide that, switch to Edge Select, 53 00:03:21.066 --> 00:03:25.066 see if I can get that vertical line there. 54 00:03:25.066 --> 00:03:29.066 I have! Excellent! The 3D Gimbal is just 55 00:03:29.066 --> 00:03:30.233 getting in the way there, 56 00:03:30.233 --> 00:03:32.900 so I'm going to grab that and move it in the X direction, 57 00:03:32.900 --> 00:03:36.900 along to there. Now hopefully that's split 58 00:03:36.900 --> 00:03:40.900 up our geometry. Ah, it looks like a double 59 00:03:40.900 --> 00:03:44.900 made an edge at some point, so I'm just going to undo that. 60 00:03:44.900 --> 00:03:48.900 Oh, I just want to move that in, I didn't want to subdivide or anything. 61 00:03:48.900 --> 00:03:52.900 So let's select that and then move that in. That's fine, that's 62 00:03:52.900 --> 00:03:56.900 moving freely. So X, I'm going to just move that in there, 63 00:03:56.900 --> 00:04:00.900 because then I can make another doorway 64 00:04:00.900 --> 00:04:04.900 and just push that in. As I said, we do have to be careful of how much 65 00:04:04.900 --> 00:04:08.900 detail we decide to put into our model, because the more you put in 66 00:04:08.900 --> 00:04:12.900 the more odd it's going to look compared to everything else. But I think that's about 67 00:04:12.900 --> 00:04:16.900 the right level of detail. If there we some shadows casting in there it wouldn't just be a blank, 68 00:04:17.500 --> 00:04:20.800 it would look like there was something in there at least. And 69 00:04:20.800 --> 00:04:24.800 there's one final thing I would like to cover. If you have made 70 00:04:24.800 --> 00:04:28.800 a very similar model to mine we will notice, 71 00:04:28.800 --> 00:04:32.800 at the top here, we have what we think is a 72 00:04:32.800 --> 00:04:36.800 square. However if you decide to subdivide 73 00:04:36.800 --> 00:04:40.800 this, my natural instinct would be to go ahead 74 00:04:40.800 --> 00:04:44.800 and delete these faces 75 00:04:44.800 --> 00:04:48.800 here and make a nice square, so I can split it up into equal areas. 76 00:04:48.800 --> 00:04:52.800 So let's go and try and do that now and see what happens! I'm just going to Delete 77 00:04:52.800 --> 00:04:56.800 the Faces. I'm going to switch to 78 00:04:56.800 --> 00:05:00.800 Edge Select and select the edge loop running around 79 00:05:00.800 --> 00:05:04.800 the top of this model and just press F to fill it in. 80 00:05:04.800 --> 00:05:08.800 Now, if I click Subdivide, now my natural instinct 81 00:05:08.800 --> 00:05:12.800 tells me that's going to just basically chop that square into quarters. 82 00:05:12.800 --> 00:05:16.800 So let's hit Subdivide and nothing happens. 83 00:05:16.800 --> 00:05:20.800 So let's switch to Vertex Select to see 84 00:05:20.800 --> 00:05:24.800 what's going on there. And we can see that this square is 85 00:05:24.800 --> 00:05:28.800 in fact not a square. If we look up here we 86 00:05:28.800 --> 00:05:32.800 can see that the Vertices that I have selected are 16. In fact, this is 87 00:05:32.800 --> 00:05:36.800 a 16 sided square, it just happens that some of the sides 88 00:05:36.800 --> 00:05:40.800 lie in line with one another. Now this is a special 89 00:05:40.800 --> 00:05:44.800 case where it's called an ngon, a numbered 90 00:05:44.800 --> 00:05:48.800 sided polygon. In this case it's a polygon that looks like a square but, in fact, 91 00:05:48.800 --> 00:05:52.800 has 16 sides. Now you cannot subdivide, 92 00:05:52.800 --> 00:05:56.800 Blender doesn't know how you want that to be subdivided, 93 00:05:56.800 --> 00:06:00.800 because it's so confusing for it, basically, even though in our 94 00:06:00.800 --> 00:06:04.800 minds we can see that as a square. So in order to create 95 00:06:04.800 --> 00:06:08.800 geometry on top of our model, we're going to have to create it separately 96 00:06:08.800 --> 00:06:12.800 and then manipulate it on top of our model. So let's go 97 00:06:12.800 --> 00:06:16.800 ahead and do that now! I want a couple pillars on top here, so I'm just going to undo the 98 00:06:16.800 --> 00:06:19.800 subdivide, because I really don't want 99 00:06:19.800 --> 00:06:22.600 all of those vertices on top of my 100 00:06:22.600 --> 00:06:26.600 model. And in fact, I'm just going to undo it all together so I can 101 00:06:26.600 --> 00:06:30.600 play with this area here. So if we go and select these 102 00:06:30.600 --> 00:06:34.600 and Subdivide, it will subdivide the faces. If we select 103 00:06:34.600 --> 00:06:38.600 there and Subdivide that, we end up with something that we can start working 104 00:06:38.600 --> 00:06:42.600 on. So I'm going...That is a square I think. Yes it is! 105 00:06:42.600 --> 00:06:46.600 So that's a square there. Can we join that into 106 00:06:46.600 --> 00:06:48.666 one object? Cast 107 00:06:49.266 --> 00:06:53.266 your mind back to when we were making our plane 108 00:06:53.266 --> 00:06:57.266 earlier on. We could merge these 109 00:06:57.266 --> 00:07:01.266 together. So if we Remove Doubles, that sounds an odd thing to say, 110 00:07:01.266 --> 00:07:05.266 and turn up the Merge Distance what happens? Well, 111 00:07:05.266 --> 00:07:09.266 It puts it all into one place. So let's do that for 112 00:07:09.266 --> 00:07:11.500 the entire top of the model and see what happens. 113 00:07:12.033 --> 00:07:16.033 Eventually I presume that this would merge to a point. 114 00:07:19.866 --> 00:07:21.900 This is where the Circle Select comes in 115 00:07:21.900 --> 00:07:25.900 handy. Remove Doubles. 116 00:07:25.900 --> 00:07:29.900 Yes, that moves it to a point! Let's see if there's 117 00:07:29.900 --> 00:07:33.900 a happy medium for us. 118 00:07:33.900 --> 00:07:37.900 Ah hah! That's nice! So we 119 00:07:37.900 --> 00:07:41.900 can play with this and we end up with our four squares on top. It makes the 120 00:07:41.900 --> 00:07:45.900 geometry around our model a little odd, but that's 121 00:07:45.900 --> 00:07:49.900 actually made it so we've got our four squares. And then, 122 00:07:49.900 --> 00:07:53.900 we can subdivide them into the areas we want. Now, 123 00:07:53.900 --> 00:07:57.900 there's a bit of a stroke of luck there that wouldn't always work out for you. What 124 00:07:57.900 --> 00:08:01.900 I was going to propose is, now you've got that small area there, you can remove those 125 00:08:01.900 --> 00:08:05.900 faces and then recreate a square in there, and it would 126 00:08:05.900 --> 00:08:09.900 only have four vertices for that square. Ah but now we've got 127 00:08:09.900 --> 00:08:13.900 this area here, that was very fortuitous. We can lift these 128 00:08:13.900 --> 00:08:17.900 up to make our special areas here, 129 00:08:17.900 --> 00:08:21.900 and it's in danger of looking a little 130 00:08:21.900 --> 00:08:25.900 wonky, so scale that one in on top. 131 00:08:25.900 --> 00:08:29.900 And as we can see there, it hasn't scaled into the center. In this 132 00:08:29.900 --> 00:08:33.900 case I don't mind but you can see that it's a bit wonky, 133 00:08:33.900 --> 00:08:37.900 whereas before you wouldn't have expected it to do that, and that's 134 00:08:37.900 --> 00:08:41.900 because it has extra geometry around the edges 135 00:08:41.900 --> 00:08:45.900 here. So whereas this edge here and this edge here 136 00:08:45.900 --> 00:08:49.900 are just one face, these are two faces. So 137 00:08:49.900 --> 00:08:53.900 it weights the extrusion or rather the scale slightly differently. 138 00:08:53.900 --> 00:08:57.900 Of course, once we've done that, we could grab it and limit 139 00:08:57.900 --> 00:09:01.900 it and move it so it's roughly in the right place again. And unless 140 00:09:01.900 --> 00:09:05.900 you're being super, you know analyzing it down to the 141 00:09:05.900 --> 00:09:09.900 core you probably won't notice, because you're going to be 142 00:09:09.900 --> 00:09:13.900 over here. Alright, that sums up this lesson! 143 00:09:14.333 --> 00:09:17.900 How did you guys get on to create anything fancy? Let's 144 00:09:17.900 --> 00:09:21.900 see your creations in the discussions. Take care!