WEBVTT 00:00.450 --> 00:04.910 Welcome to the introduction to marking seems in this video. 00:04.910 --> 00:08.360 You realize that you've unwraps will have seams in them. 00:08.370 --> 00:09.400 Well most of the. 00:09.410 --> 00:16.200 Way you can do an unwrap where all the faces are on top of one another says all been squished together 00:16.200 --> 00:17.850 into one location. 00:17.910 --> 00:20.870 And of course that's useful for certain circumstances. 00:20.970 --> 00:28.230 But usually you'll want to have seems to define how you want blender to unwrap will be learning how 00:28.230 --> 00:35.010 to mark seams where you want them and understand that this gives us the most control over our models 00:35.040 --> 00:36.790 unwrapping. 00:36.780 --> 00:38.580 So we've said seems lots. 00:38.580 --> 00:40.120 What is a seam. 00:40.290 --> 00:45.990 Well it is a cut in your model telling blender how to unwrap the model itself. 00:45.990 --> 00:52.590 Now if you imagine seem most of us would associate a seam with a bits of clothing now a bit of clothing 00:52.590 --> 00:54.610 becomes a 3D model. 00:54.690 --> 00:57.950 But essentially it's made from 2D fabric. 00:58.140 --> 01:03.720 So it's a great way of visualizing how something two dimensional is then put together it's a three dimensional. 01:03.840 --> 01:11.040 And of course the reverse if you were to unstitch along those scenes it your your shirt or your trousers 01:11.340 --> 01:14.530 would end up being a flat bit of material. 01:14.550 --> 01:17.990 And they may not resemble much of the original. 01:18.090 --> 01:25.560 Close do look odd and so you ve unwraps occasionally it allows you to separate parts of your meshes 01:25.560 --> 01:31.020 from one another and apply texture to those parts individually. 01:31.080 --> 01:37.030 So a couple of tips for making seams and will go more into this later on as well. 01:37.110 --> 01:43.710 Now seams can ease the cause distortion a mis alignment of textures so you do have to be careful where 01:43.710 --> 01:45.350 you put them. 01:45.420 --> 01:48.560 Seams often occur on hard edges. 01:48.690 --> 01:52.620 Now on organic models that's not too much of a problem. 01:52.680 --> 01:55.540 You just need to hide them out of the way. 01:55.560 --> 02:06.540 But on a more industrial or what we call hard surface non organic models are hard edge and a seam often 02:06.540 --> 02:07.780 coincide. 02:08.780 --> 02:12.050 They are made where you are least likely to see them. 02:12.050 --> 02:17.630 So if there is any distortion a misalignment of textures that you are applying you're less likely to 02:17.630 --> 02:21.230 see them and they won't ruin your model and understand. 02:21.320 --> 02:26.430 As I've said before this gives us the most control over our model. 02:26.570 --> 02:30.930 So let's go make some seams now and hop on over into a blender. 02:31.220 --> 02:36.350 Okay so we're going to start in a default blender scene and not try anything too complicated at the 02:36.350 --> 02:38.230 moment when it comes to marking seams. 02:38.360 --> 02:44.150 But I'm going to get rid of that cube and go ahead and add in a euv Sphere. 02:44.190 --> 02:46.120 Now I'm going to play with that for a moment. 02:46.160 --> 02:54.380 I'm going to give myself an image editor as well so we can see the unwrap as it happens we don't particularly 02:54.380 --> 02:58.430 need an image there but if you want to play with the picture of the world that we were playing with 02:58.430 --> 03:01.080 before then by all means go ahead. 03:01.160 --> 03:05.140 Okay so let's have a look at what impact it has. 03:05.150 --> 03:05.490 Why. 03:05.510 --> 03:10.620 We just unwrap as we can expect it produces this. 03:10.640 --> 03:17.150 Everything piled on top of one another and that has its uses but it's no good if we want to map something 03:17.150 --> 03:21.090 across the entire sphere in this case. 03:21.290 --> 03:23.750 So let's try adding in a scene. 03:23.790 --> 03:28.570 Now what we need to do is select the edges or edge loop. 03:28.580 --> 03:29.900 That's often very powerful. 03:29.900 --> 03:31.750 Not always but sometimes. 03:31.940 --> 03:38.180 I'm missing the edge loop here that goes all the way down from here to the very bottom and would just 03:38.180 --> 03:44.090 start with that one and we need to tell blender that that edge is a seam and we can do that over in 03:44.090 --> 03:51.020 the tool shelf and the shading Enu vs tab we can click on Mark seen is also available under the mesh 03:51.020 --> 03:58.200 menu under edges Mark scene and of course we can see the shortcut for the edges menu is control and 03:58.280 --> 04:02.110 so we can hit control any and Mark seam. 04:02.480 --> 04:05.690 Now when you mark the scene it goes red in colour. 04:05.690 --> 04:06.580 If I just. 04:07.340 --> 04:11.210 Unselect that edge loop there we can see that it's red in colour. 04:11.210 --> 04:18.170 Now select everything and see what happens if we unwrap and although it's different it's still a bit 04:18.170 --> 04:23.360 difficult to use because of the stretching and distortion I can see in front of me. 04:23.480 --> 04:27.240 So let's try perhaps adding in a nother. 04:28.270 --> 04:30.440 Over the other side some with a hole down. 04:30.490 --> 04:32.940 Old select the edge the loop running the other way. 04:32.980 --> 04:34.930 It's not quite essential that select the other one. 04:35.080 --> 04:37.750 I'm just going to clip Mark seam in the tool shelf. 04:37.930 --> 04:40.830 Select everything and unwrap again. 04:41.800 --> 04:43.630 Okay that's a bit different isn't it. 04:43.630 --> 04:52.570 We've got to use V unwraps Now these because we've sliced all the way through the model they are now 04:52.570 --> 04:54.320 separate islands. 04:54.490 --> 04:55.200 If we. 04:55.230 --> 05:01.520 Oh if I just expand this out so you guys can see more of the header bar down the bottom here. 05:01.540 --> 05:07.450 Remember we can select the verte sees the edges the faces and then there's the Forth button there which 05:07.450 --> 05:08.450 is Ireland. 05:08.530 --> 05:13.630 We can actually move these individual islands about and if there was an image underneath it would be 05:14.020 --> 05:16.230 changing on here as well. 05:16.240 --> 05:22.340 Now we can add a seam around the equator of this sphere so that would be this one. 05:22.350 --> 05:29.510 Here we go window control an E and Mark a seam and a select everything. 05:32.810 --> 05:34.410 And unwrap. 05:35.340 --> 05:38.580 How we get something completely different. 05:38.580 --> 05:44.550 I think during that laskey press I must have accidentally created some doubles because we've got this 05:44.640 --> 05:49.630 ring around here so I'm just going to select everything I'm going to search for doubles. 05:50.970 --> 05:52.140 And remove doubles. 05:52.140 --> 05:56.160 Yes I did inadvertently create a ring of double So let's unwrap that. 05:56.280 --> 06:00.190 And that's created four separate islands as you can see. 06:00.240 --> 06:02.950 Cut the model in half one way and the other. 06:02.970 --> 06:05.460 Now there will be times when you've misplaced to seem. 06:05.460 --> 06:08.530 So let's try removing a scene now. 06:08.550 --> 06:12.210 It's very similar to what we've done before by adding a seam. 06:12.210 --> 06:14.460 It's just another option there. 06:14.460 --> 06:19.760 So I'm going to select this edge loop running along here and the one the other side. 06:20.190 --> 06:21.260 Now I've done that. 06:21.270 --> 06:27.150 I can either go to the tool shelf or control an E or down to the menu if you want to go through a menu 06:27.150 --> 06:29.650 system and clear the scene. 06:29.850 --> 06:38.190 Now when I go into edit mode and select all and unwrap we have a different unwrap this time as you can 06:38.190 --> 06:43.410 see there's lots of ways that you can cut things up and depending on what you're trying to apply to 06:43.410 --> 06:47.740 your model will depend on how you decide to cut it up. 06:47.790 --> 06:55.830 In this case it all of these are valid unwraps some are just easier to work with than others depending 06:55.860 --> 06:56.890 on what you doing. 06:56.910 --> 07:02.810 So this would be a brilliant unwrap if you were working on an eye but not so brilliant unwrap if you 07:02.810 --> 07:09.060 are working on a map of the world mainly because none of these can be stretched to fit a map properly 07:09.720 --> 07:16.590 of course you can go really silly and you can select everything and mark it as a seam I don't know quite 07:16.590 --> 07:18.960 how this is going to turn out. 07:19.680 --> 07:24.940 It's probably just going to turn out to have a lot of little squares so let's go unwrap Yeah. 07:24.960 --> 07:25.690 There we go. 07:25.760 --> 07:30.370 It's literally every one of these faces is now his own island. 07:30.420 --> 07:36.150 Obviously that's a bit extreme but you might want to play with the various options that you've got here 07:36.150 --> 07:41.340 so I can select a couple of segments here as we go around our. 07:41.370 --> 07:42.850 I was going to select them at random. 07:42.870 --> 07:45.110 Oh I want that in a ring. 07:45.150 --> 07:45.660 There we go. 07:45.660 --> 07:52.890 So we selected the lead segments I can mark them as a seam and we'll get some probably Cresent shaped 07:52.980 --> 07:55.560 unwrapped when we go and unwrap it. 07:55.560 --> 08:00.110 There we go see problems in maps of the world that look like this when they're unravelled. 08:00.150 --> 08:05.820 In fact that's how a lot of early Globes were made when they folded all the bits of paper that they 08:05.820 --> 08:08.760 printed the map on onto a globe to make them. 08:08.910 --> 08:16.170 One final thing that you can do rather than hitting you and unwrap every time is after you've made a 08:16.170 --> 08:18.800 change to let's make one final change here. 08:18.810 --> 08:25.830 I'm going to highlight everything and clear those scenes and I'm going to send it back to that equatorial 08:25.950 --> 08:30.170 cup that we had before which is that one there are marked for scene. 08:30.400 --> 08:30.800 OK. 08:30.840 --> 08:32.990 So now we've done that if we select. 08:33.000 --> 08:40.780 All we can go over to the image editor and unfortunately it's not the U.K. it's actually v e key. 08:40.900 --> 08:43.350 Well the unwrap again. 08:43.350 --> 08:50.580 And that's also available under uv's on the menu option and unwrap as you can see there's very powerful 08:50.580 --> 08:55.320 it stops you having to muck around over in these 3-d ED all the time. 08:55.320 --> 09:03.330 Incidentally these other ones kind of ignore your your scenes so if we go smart TV projects it's pretty 09:03.330 --> 09:04.020 much ignored. 09:04.020 --> 09:12.180 Those scenes all together in fatties that's totally unusable for anything I can think of at the moment. 09:12.180 --> 09:17.420 Let's go ahead and give your knowledge a little bit of a test with a challenge. 09:17.880 --> 09:24.840 Okay so this one's going to look a bit straight forward but it's can be conceptually hard to work out 09:25.170 --> 09:31.940 how to play scenes on a 3D object which are going to make convert to a 2D object. 09:31.950 --> 09:39.480 So what I'd like to do now is place the appropriate scenes so that you can unwrap a cube so it looks 09:39.480 --> 09:40.620 like this. 09:40.620 --> 09:45.340 And we've seen this animation before so we end up with that cross shape. 09:45.420 --> 09:48.480 That's how I want you to unwrap a cube. 09:48.630 --> 09:51.440 So pause the video and give that a go. 09:53.810 --> 09:54.530 Okay guys. 09:54.530 --> 09:55.420 Welcome back. 09:55.610 --> 09:58.130 Let's go ahead and unwrap a cube. 09:59.590 --> 10:01.930 Okay so we're done with this sphere for the moment. 10:01.930 --> 10:05.210 I am literally going to hop into objet mode and delete it. 10:05.230 --> 10:10.520 I don't need to start up a new blend file and I'm going to add in a cube. 10:10.930 --> 10:14.890 Okay so we've got the cube in front of us and then hop into edit mode. 10:14.890 --> 10:23.710 Now I've got to visualize chopping this up so I'm going to select a couple of edges under me bring up 10:23.710 --> 10:28.810 the tool shelf here so I can just go Yeah definitely that one. 10:28.960 --> 10:34.820 There's going to be a top to it's office square I'm going to represent that the top of that cross. 10:34.820 --> 10:38.120 So that is going to be there. 10:38.280 --> 10:39.800 Mark seam and there. 10:39.820 --> 10:41.960 So that's definitely one bet. 10:42.010 --> 10:44.360 Then it comes out. 10:44.410 --> 10:48.170 So that would be the middle bit of a cross. 10:48.250 --> 10:52.170 So it needs to come this way so it's that one there. 10:53.420 --> 10:54.590 Mark scene. 10:55.740 --> 10:57.910 And this one here Mark scene. 10:58.520 --> 11:04.240 Or is it all this can be confusing so that there no it's not that one there at all. 11:05.750 --> 11:13.670 This is why it's conceptually hard in 3-d to get this in your head since Hashi there of all places. 11:13.850 --> 11:21.110 And that creates the cross and there's no seam across here to this spear here as that seems there and 11:21.110 --> 11:27.810 then it's this is following round and then we end up with two bits there and there. 11:28.130 --> 11:31.140 So we just need to chop all. 11:32.520 --> 11:39.030 I've lost my bearings now so I've got that bit there a seam here and I think it's there there and there 11:39.720 --> 11:42.060 of course what we can do at any point of filling those in. 11:42.060 --> 11:46.310 I'm just going to see if I've got that top bit right. 11:46.560 --> 11:51.630 Well we've got some of it right as you can see and then it's twisted and distorted the rest so let's 11:51.630 --> 11:57.030 put in those three seams there and Mark seen them go over here. 11:57.790 --> 11:59.370 Select everything. 11:59.490 --> 12:00.760 E to unwrap. 12:00.930 --> 12:04.290 Okay so we're getting closer. 12:04.410 --> 12:09.360 I've obviously joined the wrong two together so I'm going to try that scene. 12:09.420 --> 12:14.880 I think that's actually the one I had the first time I've rotated this thing round so much I'm not surprised 12:14.880 --> 12:15.800 I'm not dizzy. 12:15.900 --> 12:17.770 So let's try to unwrap again. 12:17.820 --> 12:20.730 Yes there we go we've got that cross shape. 12:20.730 --> 12:22.200 So what does that look like. 12:22.200 --> 12:23.970 That looks like. 12:24.790 --> 12:27.270 Let's just clear the selection there. 12:27.320 --> 12:36.110 That looks like two seas or two ends joined together either side so that's worked out pretty well as 12:36.110 --> 12:42.260 you could see it can be quite challenging even with a cube just to get the right seams the ones that 12:42.260 --> 12:43.370 you want. 12:43.550 --> 12:50.050 Or in this case the ones I wanted you to get just right in order to do the unwrap. 12:50.090 --> 12:55.010 This is a great first step to understanding how to unwrap models. 12:55.010 --> 12:57.310 Now it's not an exciting procedure. 12:57.320 --> 13:01.720 I've never met anybody who relishes the idea of unwrapping a model. 13:01.730 --> 13:07.970 It's one of those things that has to be done in order to do it and it can be a bit mind boggling. 13:07.970 --> 13:12.250 It is very satisfying however once you managed to get it right. 13:12.290 --> 13:18.590 And of course next time we'll be looking at scenes that are on slightly more complicated shapes but 13:18.590 --> 13:23.180 until we get to that point remember to share your work in the discussions. 13:23.300 --> 13:26.220 And I will see you guys in the next lecture.