WEBVTT 00:00.700 --> 00:03.790 Welcome to optimizing a U.S. map. 00:04.240 --> 00:07.250 In this video you will be using blender render. 00:07.390 --> 00:13.330 So even though we're doing our full renders in cycles for the actual text just set up an newey mapping 00:13.330 --> 00:19.240 we're going to use Blender render because it gives us a real time view in the viewport which is far 00:19.240 --> 00:22.170 better than waiting for cycles to render out. 00:22.600 --> 00:26.130 We're going to be making your UV map more uniform. 00:26.140 --> 00:33.520 So making sure that we're minimizing distortion and optimizing the image use We're going to be understanding 00:33.520 --> 00:37.400 the use of margins and how they are important. 00:37.750 --> 00:42.260 And then we're going to learn more about seams and their placement. 00:42.760 --> 00:45.880 So let's now hop straight on over into blender. 00:47.550 --> 00:53.050 Okay so back over in blender what's we going to do is we're going to experiment with optimizing our 00:53.060 --> 00:57.670 You've V maps not on our church scene but on something a bit more complicated. 00:57.720 --> 01:02.610 So I'd like you to go ahead and make sure you've saved your work of course and go ahead and open up 01:02.670 --> 01:04.180 a new blender file. 01:04.500 --> 01:09.480 We are going to go ahead and delete that default cube and add something a bit more interesting to work 01:09.480 --> 01:09.930 with. 01:10.080 --> 01:14.220 And we're going to add a mesh and the monkey and the monkey's name is Suzanne. 01:14.400 --> 01:21.030 Now that we've got Suzanne in the scene what we can do is straightaway apply a uniform texture across 01:21.030 --> 01:25.470 this model so we can see how that texture is being distorted. 01:25.470 --> 01:31.380 So we need to be in blender render to do this some kind of changed my rendering type to blend a render. 01:31.440 --> 01:36.070 I'm going to just pull this area out here and change it to the U V. 01:36.110 --> 01:37.910 Ed So there we go. 01:38.310 --> 01:44.140 So let's go ahead and first of all let's go and unwrap our monkey without any seams or anything. 01:44.310 --> 01:49.170 And we can see there that it is quite a horrible unwrap. 01:49.650 --> 01:53.310 I think this area in the middle of this splodge is the face. 01:53.310 --> 01:58.470 However it's not particularly clear in some areas are quite open they're all packed together really 01:58.470 --> 01:59.130 tightly. 01:59.160 --> 02:04.320 So I think there's going to be reflected in it when we actually come to apply the texture so let's do 02:04.320 --> 02:11.190 that now let's click on new for a new texture and this time I'm going to leave on Main this actually 02:11.190 --> 02:19.150 under name at u v grid and the generated type I'm going to switch to you v grid and click okay. 02:19.200 --> 02:25.860 Now this gives us a a uniform texture a unique grid across our entire model and this will help us identify 02:25.860 --> 02:27.420 areas of distortion. 02:27.660 --> 02:29.730 We can't see it on here at the moment. 02:30.060 --> 02:32.450 Oh we could if we went textured view. 02:32.490 --> 02:38.430 But the problem with going to textured view is that huge car it's shadowed as well which makes it difficult 02:38.430 --> 02:39.150 to see. 02:39.150 --> 02:43.530 So there's something else that you can do and that's enabled textures in solid mode. 02:43.530 --> 02:48.710 So in the 3D editor properties pain which you can open with any if it's not open already. 02:48.870 --> 02:51.540 Scroll down to where it says shading. 02:51.540 --> 02:55.750 Now the moment the option won't be there because we're not in solid mode. 02:55.890 --> 02:58.050 So let's go ahead and switch to solid mode. 02:58.080 --> 03:03.310 And what we're looking for textured solid will appear brilliant Now we can see the chequers on there 03:03.390 --> 03:06.510 and I'm going to hide tool shelf and the properties window. 03:06.840 --> 03:12.480 Zoom in a little and hop into object mode so we've not got the mesh all the edges and vertices appearing 03:12.780 --> 03:15.660 and we can see here that we've got a bit of a problem. 03:15.660 --> 03:22.950 We've got some areas like around this I where it's really compressed where these squares are very very 03:22.950 --> 03:23.870 small. 03:24.180 --> 03:30.330 However around the back of the head we've got oh dear we've got one square almost taking up the entire 03:30.330 --> 03:31.160 back of a head. 03:31.200 --> 03:36.960 So there's a lot of distortion going on there now make it very difficult to do anything with that texture 03:36.970 --> 03:39.870 in fact it will be stretched and distorted over the place. 03:39.870 --> 03:41.170 So how can we make that better. 03:41.170 --> 03:44.410 Well the good use of seams will help with this. 03:44.430 --> 03:49.220 So let's go and split Suzanne and unwrap her. 03:49.260 --> 03:55.110 Now one of the best ways of unwrapping a head is going down the back because the back is not the focus 03:55.110 --> 03:55.700 point. 03:55.860 --> 04:02.520 So if we go from this edge here and just go backwards I would select an edge loop but I would end up 04:02.520 --> 04:07.070 having to undo a load of edges rather than adding them. 04:07.080 --> 04:14.100 So I prefer in this case to add them themselves so we have got a continuous edge around to the bottom 04:14.100 --> 04:15.200 of the chin. 04:15.270 --> 04:19.300 So let's go ahead and mark that as a seam. 04:19.500 --> 04:24.050 Select everything again and unwrap and let's have a look at how it changes. 04:24.150 --> 04:30.960 For a start I can see the susanne's face on the yuva unwrap and not only that but the model itself the 04:30.960 --> 04:33.370 squares on it are much more uniform. 04:33.470 --> 04:35.390 It's a little bit of distortion around these. 04:35.400 --> 04:39.210 I still am but it's much much better. 04:39.210 --> 04:40.150 Much more uniform. 04:40.230 --> 04:46.530 Now you can see the one of the problems with generating a seam down the model is there is some distortion 04:47.010 --> 04:53.340 where the two halves meet and it can be very challenging to make sure that these two halves actually 04:53.340 --> 04:54.420 match up. 04:54.660 --> 04:57.440 Alas that is a topic for another day. 04:57.660 --> 05:01.860 So now we've got this looking a bit more uniform as a couple of other things that we could go ahead 05:01.860 --> 05:08.400 and do we could separate the ears and make them their own you v map and we can certainly add a few more 05:08.400 --> 05:16.110 seems to help break this apart but this gives you a good idea of how to start optimizing the layout 05:16.170 --> 05:18.020 of any euv Map. 05:18.030 --> 05:25.020 Now having a look at the U.S. map itself over here what we can do is start doing some extra bits and 05:25.020 --> 05:25.570 bobs. 05:25.680 --> 05:32.400 So in the uv's menu there are a series of options which can help with distortion. 05:32.400 --> 05:39.660 So one of the thing is packing islands now the islands themselves are these individual items so the 05:39.690 --> 05:46.040 eyes of Suzanne are two separate items as is the rest of the head. 05:46.110 --> 05:47.070 So what. 05:47.100 --> 05:50.130 We can do is change the distance between those. 05:50.130 --> 05:55.440 And this is very important when it comes to games because you can end up with some horrible effects 05:55.440 --> 05:58.760 happening if these margins aren't big enough. 05:59.280 --> 06:04.400 So what we can do here is just increase this just ever so slightly. 06:04.740 --> 06:06.230 And in the. 06:07.630 --> 06:09.090 Operator panel. 06:09.420 --> 06:11.920 And you do have to do this in 3D Ed head. 06:12.040 --> 06:16.140 We can change the margin and you can also do that when you originally unwrap as well. 06:16.240 --> 06:21.460 And you can see that moves the actual eyes away from the rest of the model over in a bit. 06:21.460 --> 06:25.460 When we come to painting that can be incredibly useful. 06:25.510 --> 06:33.020 You also get this as I was saying when you actually go and do the unwrap we have a margin there as well. 06:33.070 --> 06:38.800 So once you've played with those options there are a couple of other things that you can do so you can 06:38.800 --> 06:43.990 pack the islands and that tries to optimize the space on your image via these islands. 06:44.110 --> 06:49.840 And then we can also go ahead and average the island scale now doesn't look like that's going to do 06:49.840 --> 06:51.110 much in this case. 06:51.160 --> 06:57.070 But if these AIs themselves were much much larger on this yuva unwrap than the rest of the model was 06:57.100 --> 07:02.920 it will help average outs of the squares are more uniform across our model. 07:02.920 --> 07:08.830 Another option for us is minimizing stretch with control and V. 07:08.950 --> 07:14.770 And you can use the scroll wheel there to go backwards and forwards and this can help control the model 07:14.800 --> 07:15.560 itself. 07:15.730 --> 07:22.480 Now at the moment it looks like a blend of one is a good option for us there and we can also see down 07:22.480 --> 07:25.190 at the bottom there we can use the plus and minus skis. 07:25.240 --> 07:27.950 I'm presuming I don't have my number pad with me today. 07:28.060 --> 07:32.520 That's probably the number pad to go plus a minus and move in and out. 07:32.650 --> 07:39.130 Looking at the U.S. map itself it's certainly better looking like that Brilliant's a one final thing 07:39.130 --> 07:42.250 to consider when you're placing scenes. 07:42.310 --> 07:46.950 Now can you identify where the seam is on the model. 07:46.990 --> 07:49.170 So this is going down the back of a head. 07:49.240 --> 07:55.720 So if I was to highlight a particular face as I am going to switch to face select let's say this face 07:55.720 --> 08:02.140 here if I was to highlight that particular face would you be able to tell me where on the model it actually 08:02.140 --> 08:02.960 was. 08:02.980 --> 08:08.560 If you can't if you can't easily work that out so obviously sometimes you do have to think about it 08:08.560 --> 08:09.180 a little. 08:09.280 --> 08:14.560 If you can't easily work that out then it might be challenging later on when you're trying to apply 08:14.560 --> 08:18.850 textures or even more detail to the model itself. 08:18.850 --> 08:24.460 So it's important that you unwrap not only to minimize the distortion that you can have and make your 08:24.460 --> 08:31.480 U.S. map more uniform but also so it's clear for you to work with so you're not spending your time trying 08:31.480 --> 08:33.950 to work out what's going on. 08:33.970 --> 08:35.160 So with that in mind. 08:35.200 --> 08:37.680 I've got a challenge for you guys. 08:39.510 --> 08:45.770 I would like you to optimize your current unwraps So pick an object and check it's unwrap. 08:45.780 --> 08:50.250 If it's something you haven't unwrapped yet then you can start afresh and make sure as optimized from 08:50.250 --> 08:57.230 the beginning load in the UVA texture image texture to check for distortions on your model. 08:57.450 --> 08:58.230 So go ahead. 08:58.230 --> 09:00.560 Balls are video now and give that a go. 09:02.760 --> 09:04.320 Okay guys welcome back. 09:04.410 --> 09:06.900 Let's go optimize a V unwrap. 09:08.960 --> 09:14.490 Okay welcome back to blender so I've decided to work on my pillow over. 09:14.540 --> 09:14.910 Gone. 09:14.930 --> 09:19.390 Al colon so I'm going to hop into object mode here so I can see what's going on now. 09:19.400 --> 09:20.380 I'm not sure. 09:20.390 --> 09:24.020 In fact I'm going to hop into edit mode select everything and unwrap it. 09:24.020 --> 09:27.520 I'm going to use a smart U project to see what I get with that. 09:27.560 --> 09:33.470 I don't think I've actually unwrapped this one at all yet so it'll be a good practice right from the 09:33.470 --> 09:40.760 very beginning and I'm going to add a new image here and I'm going to use the generated type here euv 09:40.760 --> 09:48.250 Grid and click okay so this will give us a good indication on our model here of how it's looking. 09:48.250 --> 09:53.790 So let's go in to text mode here and just see how that is working. 09:53.810 --> 09:58.180 Are not applied this yet so bear with me a few moments. 09:58.210 --> 10:05.760 Let's go sign a new material and I'm good to set the colour as an image colour. 10:05.880 --> 10:08.970 Could go round and do it this way and tight. 10:08.990 --> 10:09.650 There we go. 10:09.980 --> 10:18.860 So I'm not seeing much on when I've got it in edit mode because of all the all the edges highlighted 10:18.860 --> 10:23.570 etc. Some of them hop out of that and just go round the model and see how it's unwrapped. 10:23.690 --> 10:29.130 Now smart TV projects here may actually do everything that we want it to so there's always the chance 10:29.130 --> 10:30.650 that I don't need to do anything more. 10:30.830 --> 10:36.500 Now this area around the top here strikes me as highly distorted. 10:36.500 --> 10:41.200 We can see it's got loads of joins in it slows a little. 10:41.660 --> 10:44.840 Suppose a forwards in on itself. 10:44.840 --> 10:49.430 But actually I'm not too fussed about that and the reason for that is quite simply you're not going 10:49.430 --> 10:50.780 to see it. 10:50.780 --> 10:55.910 And that is the best place for distortion if there is any where no one's going to spots it. 10:55.910 --> 10:58.510 So let's have a look along here. 10:58.820 --> 11:00.110 So this looks okay. 11:00.110 --> 11:04.290 These squares all of an equal size. 11:04.310 --> 11:06.540 Let's scroll down a little. 11:07.820 --> 11:08.880 Hit the right key. 11:08.900 --> 11:11.360 Pan down rather than scroll. 11:11.840 --> 11:15.460 Case of that is looking okay around there as well. 11:15.500 --> 11:16.700 We can see there's a scene. 11:16.700 --> 11:20.690 I don't think that's going to cause us any particular issues. 11:20.750 --> 11:26.480 In fact there's a lot of seams around the bottom so this is one of the places where I can take an opportunity 11:26.840 --> 11:33.590 to perhaps create a new set of scenes and running straight down the middle so it can peel open. 11:33.590 --> 11:40.070 I'm going to give that a go now so going to hop into edit mode and if I have preserved my hedge loops 11:40.100 --> 11:42.630 I'd be able to select all the way up. 11:42.800 --> 11:43.940 In one fell swoop. 11:43.940 --> 11:48.640 Unfortunately when I did this in setting that did break that functionality. 11:48.640 --> 11:59.120 However I should with a bit of care be able to continue all the way up the model and select the wrong 11:59.150 --> 11:59.690 edge. 11:59.750 --> 12:05.180 There on that one there so I think that's all join together relatively well go all the way up the top 12:05.180 --> 12:08.410 so no use control an E and Mark a scene. 12:08.630 --> 12:16.040 Now I'm hoping what this will do is unwrap it and fold it round relatively concisely So let's just have 12:16.040 --> 12:18.760 a look at the U.S. map. 12:18.940 --> 12:20.750 Okay so we might need to do something else here. 12:20.750 --> 12:26.270 I don't know whether it's meeting at the top that looks like it needs to be cut open and separated so 12:26.270 --> 12:33.770 it's not pinching but more importantly what does that do to the actual texture of our object to distort 12:33.770 --> 12:35.720 it massively or not. 12:35.720 --> 12:38.120 So that looks obviously much better at the top. 12:38.120 --> 12:44.180 Now this flowing round really well we've only got the one seam around our model so we won't have too 12:44.180 --> 12:45.910 much distortion going on. 12:45.960 --> 12:51.740 So at the top there looks okay and does the bottom look okay well as we can see on the bottom we've 12:51.740 --> 12:58.700 got some well as drastically different size squares here so we've got this these ones here and those 12:58.700 --> 13:06.010 are kind of similar but these ones on the bottom and that is very much distorted. 13:06.050 --> 13:11.640 So what we can do here is again hopping back in forward to and from edit mode. 13:11.660 --> 13:16.900 I'm going to decide where to cut these off and I'm going to see if I can select the first stage loop. 13:16.910 --> 13:21.980 There we go around the middle there and then add another seam in it and that's just going to completely 13:21.980 --> 13:25.530 separate it all together I can select everything and unwrap again. 13:25.550 --> 13:30.140 Or of course in the U V image editor I can just hit E and it will unwrap again. 13:30.140 --> 13:31.480 And that's starting to look well. 13:31.480 --> 13:38.360 It looks much better here and looking at the model itself these squares seem to be a little less distorted. 13:38.360 --> 13:44.540 Again they are going round and pinching and I just wonder if that's because of the base here. 13:44.990 --> 13:46.700 Well that looks okay. 13:46.870 --> 13:49.730 OK again on the bottom here we can see they're nice and big. 13:49.880 --> 13:53.090 Which is great but we're not going to see it. 13:53.390 --> 13:58.160 So you don't really need to concern ourselves with that so that's looking much much better now. 13:58.160 --> 14:00.250 I don't think I need to do anything around the top here. 14:00.260 --> 14:07.390 But again if I wanted to try and minimize this pinching going on I could select a particular edgerley 14:07.470 --> 14:09.290 and select one that's lower down. 14:09.290 --> 14:11.390 Mark that as a seam. 14:11.690 --> 14:17.690 So Mark seen they're now going to go to the very top here and Mark the very top edge as a seam and what 14:17.690 --> 14:22.860 that would do is basically separate it into its own circle and that will prevent the pinching all together. 14:23.020 --> 14:25.550 It's going to mark that as a seam and I'm going to do the same. 14:25.550 --> 14:26.630 Down the bottom. 14:26.630 --> 14:31.310 Now of course you have to be careful if you make too many seams because it can make things a little 14:31.310 --> 14:32.810 harder to handle. 14:32.810 --> 14:37.550 And we certainly don't want to make things more difficult for us some select this edgeley Running on 14:37.550 --> 14:38.180 the bottom. 14:38.420 --> 14:42.940 And also Mark that as a seam and this will be the final one that I do for the moment. 14:43.080 --> 14:49.700 London to highlight everything and unwrap it and we can see there that we now we've actually got much 14:49.700 --> 14:54.550 more uniform size squares that works out tremendous there. 14:54.560 --> 14:57.370 That's fine and up the top here as well. 14:57.380 --> 14:58.420 So that's brilliant. 14:58.760 --> 15:03.300 Actually taking this step at a time and moving forward a little bit at a time. 15:03.380 --> 15:09.170 Certainly we've progressed much quicker and taking things section by section rather than trying to do 15:09.170 --> 15:10.450 the whole lot at once. 15:10.490 --> 15:13.410 Do a little bit see how that affects the unwrap. 15:13.420 --> 15:16.530 Continue doing that and cutting it up logically. 15:16.580 --> 15:19.970 Imagine you had a 3D object in front of you. 15:20.020 --> 15:21.560 You had to try and slice it. 15:21.560 --> 15:23.720 That's what all these scenes are about. 15:23.720 --> 15:28.940 And obviously when we put the scenes in the right place we end up with minimal distortion to the actual 15:28.970 --> 15:30.520 underlying texture. 15:30.830 --> 15:31.970 How did you guys get on. 15:31.970 --> 15:37.750 I hope you manage to optimize your u v maps and of course I will see you guys in the next lecture.