WEBVTT 00:00.880 --> 00:03.640 Hello and welcome to blender model scale. 00:03.760 --> 00:11.710 In this video we will discuss how blender has its own units called blender units and that's abbreviated 00:11.710 --> 00:12.810 to be you. 00:12.820 --> 00:20.500 Now these blender units themselves can be defined as several other units as well so MM inches centimetres 00:20.500 --> 00:21.160 etc.. 00:21.190 --> 00:25.420 We're not going to use that in this particular section because it can have some it's quite severe knock 00:25.420 --> 00:32.020 on effects if we don't realize the scale or your model is set to and you're either exporting it or indeed 00:32.260 --> 00:36.160 bringing us into another scene you think it's one size to bring it across. 00:36.160 --> 00:38.810 That's something we'll leave until a later section. 00:39.640 --> 00:45.860 Now blender units the scale works really well between zero point zero one. 00:46.770 --> 00:48.740 And 100 blender units. 00:49.020 --> 00:53.770 Now it doesn't matter what those units are whether they're millimetres or kilometres. 00:54.030 --> 00:55.960 That's the stair within blend of that bill. 00:55.980 --> 00:57.380 We will be working too. 00:57.390 --> 01:03.900 And what they apply to now rule of thumb is use that grid floor as a stage and we have a look at that 01:04.060 --> 01:10.340 in close detail and selecting an order of magnitude suitable for the level of detail. 01:10.500 --> 01:16.230 So if you were modelling the planet Earth but you were modelling a solar system you wouldn't need perhaps 01:16.230 --> 01:20.670 have it that big at all if you were on the ground and you were modelling a mountain you'd have far more 01:20.670 --> 01:21.430 detail. 01:21.870 --> 01:27.630 And if you're on a desk and you've got loads of things close up to the viewer of course you're going 01:27.630 --> 01:30.840 to have lots more detail there as well. 01:30.840 --> 01:36.790 So let's go explore blender units now and the way the blender scales things over in blender. 01:37.730 --> 01:39.510 Hey so now we're over in blender. 01:39.630 --> 01:42.450 And I'm Michael from the future that you know. 01:42.530 --> 01:49.520 Yes I've come back to this lecture to give you some better information and you may notice I'm now on 01:49.520 --> 01:51.080 a Windows computer. 01:51.080 --> 01:51.890 It doesn't matter. 01:51.890 --> 01:57.190 This just shows you the uniformity of Blender's interface across multiple platforms. 01:57.290 --> 02:02.930 So some things may be ever so slightly different but don't worry that won't change what we're doing 02:02.930 --> 02:03.620 here. 02:03.920 --> 02:10.460 So zooming in and out now you can see as we're zooming backwards and forwards we've got a scale we've 02:10.460 --> 02:12.830 got this grid floor on the ground. 02:12.920 --> 02:18.170 Now this grid floor can be controlled if I press the nta to open up the properties panel and scroll 02:18.170 --> 02:19.510 down. 02:19.610 --> 02:26.300 There is an option under display for the grid floor you can turn off if you like or turn it back on. 02:27.510 --> 02:28.740 Area go on and off. 02:28.740 --> 02:35.420 You can also change the red and green axes and you can even put the blue one on as well if you want 02:35.420 --> 02:37.740 it to leave it as defaults. 02:37.830 --> 02:40.940 But you can see here we can change the whole scale of this as well. 02:40.950 --> 02:41.810 If we wanted to. 02:41.900 --> 02:44.940 Now I'm not going to touch that I leave that as fall all the time. 02:44.940 --> 02:50.100 Just give me perspective of how large my model actually is. 02:50.100 --> 02:51.990 So let's take the real extreme. 02:51.990 --> 02:56.040 Let's go ahead and select our cube and scale it all the way down. 02:56.040 --> 02:58.990 So on a scale two point. 03:00.060 --> 03:05.470 Zero zero one if we Oh I completely mashed the keypad here. 03:05.510 --> 03:09.700 If we look down in the lower left we can see the scale that's being applied now. 03:09.710 --> 03:12.310 I can't see that very easily at the moment. 03:12.320 --> 03:19.090 If we try and scale to it will run out of zoom your do this lots during the first time you use Blender. 03:19.130 --> 03:21.590 You can't zoom any further it seems to run out. 03:21.590 --> 03:26.580 Now we can use the shortcut here or we discussed this later as well under view. 03:26.750 --> 03:32.000 If I get my mouse in the right place on the view we can view selected and we can see the number pad 03:32.150 --> 03:32.830 full stop. 03:32.830 --> 03:39.910 If you've got one can be used as well so if I go ahead and press that we zoom all the way in now. 03:40.010 --> 03:45.200 Now we're able to zoom it's reset zoom so we can see zoom in and out accordingly. 03:45.230 --> 03:47.920 Now you see the issue here there's clipping. 03:47.990 --> 03:52.900 Now we can change this as well we can change at what point the camera clips the objects. 03:53.030 --> 03:56.390 But at the moment it's just too close to the camera. 03:56.660 --> 04:01.870 Now that is a problem because you can't model effectively if you can't get close enough. 04:02.000 --> 04:07.040 And this is what I mean by if something is too small then you can't work on it. 04:07.040 --> 04:12.320 Less less than this and it's just useless as far as I'm concerned. 04:12.890 --> 04:19.050 I'm going to undo that to bring the cube back up to real size or the default size rather. 04:19.100 --> 04:21.680 And now I'm going to scale it this time by a hundred. 04:21.680 --> 04:24.170 Of course I could scout about ten thousand. 04:24.170 --> 04:29.980 Now let's zoom out and you see here we get zooming issues at this range as well. 04:30.050 --> 04:36.350 And again we can change the clipping but if you've got a scene this big I mean this is this is a huge 04:36.370 --> 04:39.050 cubits 200 blender units across. 04:39.050 --> 04:41.070 There's a pretty large cube. 04:41.090 --> 04:43.570 Now you can see the surfaces inside here. 04:43.580 --> 04:50.210 Now you may want to make an environment on those walls for instance if you want to that's one example 04:50.210 --> 04:51.780 of making something this big. 04:51.920 --> 04:56.430 But you can see that if you were making a model much bigger you start getting the clipping issue. 04:56.430 --> 05:04.280 But on the other end rather than on the low end on the high end now you can change that clipping issue 05:04.340 --> 05:07.500 on the display once again. 05:07.910 --> 05:13.490 If we scroll up or in the properties panel we scroll up just a little and go to the view. 05:13.610 --> 05:17.590 We can actually change the clipping distance the end and the start. 05:17.600 --> 05:22.990 But once again I wouldn't bother playing with those unless you really really needed to be. 05:23.000 --> 05:29.410 So we can bring that back into view now by increasing that in scaling the Senate back to a thousand. 05:30.050 --> 05:32.500 And that itself will control the clipping. 05:32.510 --> 05:38.530 But that means you're going to go outside not sort of like the normal operation range of blender. 05:39.820 --> 05:44.260 Okay so there's one final thing to go over when it comes to blender scale. 05:44.260 --> 05:49.960 This queue here is to blender units by two blending units by two blender units in size. 05:49.960 --> 05:55.720 Now what does a blender unit really mean what it can mean anything okay can mean a centimetre it can 05:55.720 --> 05:59.560 mean a metre It can mean a kilometre can mean lots of different things. 05:59.560 --> 06:02.770 In fact we can actually pick what it means. 06:03.100 --> 06:07.850 So we go over to the properties window on the right hand side. 06:08.040 --> 06:13.480 If we go to the third tab along with seen properties we get an option to switch the units. 06:13.510 --> 06:16.730 Now notice at the moment the length says None. 06:16.940 --> 06:22.210 Okay so if we switch this is it currently says meters yours may say something else if you played with 06:22.210 --> 06:23.590 this in the past. 06:23.710 --> 06:29.590 If we switch it to centimetres we can see that the units scale everything scaled down to a hundredth 06:29.590 --> 06:31.060 of what it was before. 06:31.060 --> 06:39.130 Now if we have a look at the 3-d edits of you and now we zoom out we see that the grid floor is disappearing. 06:39.130 --> 06:42.980 So we've gone a hundredth of the size which sounds great. 06:43.390 --> 06:44.490 But hang on a minute. 06:44.500 --> 06:46.810 We've now made this grid floor huge. 06:47.050 --> 06:50.560 And we can pick loads of other things as well we can do feet inches kilometres. 06:50.560 --> 06:58.800 Also notice that all of the all of these Dyne mentions all of the distances have all changed to meters. 06:58.870 --> 07:01.390 So we got two centimetres at the top here. 07:01.450 --> 07:03.940 This is one millimetre to 10 meters. 07:03.970 --> 07:05.840 The location is zero zero zero. 07:05.980 --> 07:08.850 And gravity now has meters per second on it. 07:08.890 --> 07:15.330 If we go back to the length here and switch it to none we just see we get arbitrary scales. 07:15.340 --> 07:20.470 Now by default blender units are kind of one meter. 07:20.560 --> 07:23.560 It's as straightforward as that and we see it sits in the scene. 07:23.710 --> 07:29.690 But equally you could have worked in feet but the units don't really matter. 07:29.930 --> 07:31.300 And it's difficult to get across. 07:31.300 --> 07:36.190 Now they certainly do matter of your if you put things into the real world you don't want. 07:36.340 --> 07:42.070 So you were 3D printing something and you accidentally made it a kilometre long Maybe a huge 3-d Printer. 07:42.080 --> 07:50.080 However when it comes to working in blender itself changing the units can cause a bit of a problem because 07:50.080 --> 07:55.420 if you start mixing and matching units across different projects when you go and import them they will 07:55.570 --> 07:56.610 look different. 07:56.800 --> 08:01.960 They will be different sizes and they won't we won't be able to homogenise bring all your components 08:01.960 --> 08:03.910 together easily. 08:03.910 --> 08:06.910 If you've made them at different scales. 08:06.970 --> 08:14.500 Now that said if you do choose to change the units be aware that they're under this tab and you can 08:14.500 --> 08:20.110 change them back to meters or whatever you want or indeed just go to the length and sell it to none 08:20.110 --> 08:20.410 again. 08:20.410 --> 08:27.570 And we see all these change where we see that the lens has gone from 35 millimetres back to thirty five. 08:28.000 --> 08:33.840 So it's one of those things that I'm not going to delve into deep details within the rest of the course. 08:33.880 --> 08:36.940 I'm going to leave mine as just blending units. 08:36.940 --> 08:40.390 And the reason for that is so we don't get any confusion. 08:40.480 --> 08:45.520 If you change it and then start importing things into a different model or appending models together 08:45.760 --> 08:51.780 it can be very confusing if you got nothink noted down on where the scale is. 08:52.000 --> 08:57.880 Now with that in mind noting things down just want to give you a very quick tip we can change one of 08:57.880 --> 09:03.190 these windows or create a new one and agree to create a new one from the propertys panel and just drag 09:03.190 --> 09:09.370 it down along the switch the type of that window over to a text editor. 09:09.370 --> 09:13.690 Now once youve got a text editor open you can actually type in this field now. 09:13.720 --> 09:16.820 You may wonder why you can't type anything in. 09:17.050 --> 09:20.430 Well like most things in blender you need a click new first. 09:20.440 --> 09:23.380 I'm going to bring this out so we can see whats going on. 09:23.530 --> 09:25.120 Notice Weve got new here. 09:25.260 --> 09:30.970 If we go ahead and click on you now we can type which is excellent. 09:30.970 --> 09:37.000 However what you should know is if your cursor drifts elsewhere on to a different window youre not going 09:37.000 --> 09:43.220 to be able to type anymore so do bear in mind is as you typing away wave you nudge the cursor as in 09:43.210 --> 09:49.520 your mouse cursor to somewhere else thats not over this window you will cease to type. 09:49.570 --> 09:55.120 Of course you can say that along with your project and make any notes as youre going along which may 09:55.120 --> 09:58.670 or may not be useful depending on the project you are working on. 09:59.570 --> 10:04.670 So in summary there a blender model scale can be very confusing at first. 10:04.670 --> 10:09.410 When you first get round to modelling but the important takeaway is that if youre modelling something 10:09.410 --> 10:16.290 very very large like a planet modelling it at real size might be a bit difficult. 10:16.310 --> 10:18.960 Blender just won't cope with that very well. 10:19.190 --> 10:24.470 On the on the other side of it of course if you've got something very very small trying to model that 10:24.530 --> 10:27.550 at an accurate scale is also going to cause you problems. 10:27.560 --> 10:33.950 So depending on what your modelling you may need to enlarge it or shrink it so that you can work on 10:33.950 --> 10:35.320 it with ease. 10:36.350 --> 10:38.950 Now of course it's time for a challenge. 10:39.700 --> 10:41.740 It's Challenge time. 10:41.740 --> 10:46.510 I'd like you to now think of the order of magnitude that you'll be working with. 10:46.660 --> 10:53.230 So I've filled in part of this chart so you can get an idea of what we're working to our first column 10:53.230 --> 10:53.530 here. 10:53.530 --> 10:56.200 The object is a real world object. 10:56.380 --> 10:58.510 And I've put it's real size here. 10:58.520 --> 11:03.490 Now obviously you will find ants and grasshoppers that deviate from these sizes. 11:03.520 --> 11:07.390 I'm one point six meters tall so I have based my human on that. 11:07.390 --> 11:11.020 Now that's actually quite short in so in some cases. 11:11.020 --> 11:15.550 So you know these are just general real sizes not exact. 11:15.550 --> 11:19.210 And I have gone through the motions of which where my scaling it. 11:19.210 --> 11:20.850 Am I scaling it up. 11:20.860 --> 11:26.710 Am I going to keep the scale kind of the same so one meter equals one blender unit or am I going to 11:26.710 --> 11:28.920 reduce the scale. 11:28.930 --> 11:35.770 Pause the video now go through this list give it some thought about how big you would make this object. 11:36.040 --> 11:37.920 On the left in blender. 11:41.420 --> 11:42.370 Okay welcome back. 11:42.370 --> 11:45.760 This is how I would do the scaling myself. 11:45.790 --> 11:52.060 So let's start from the car the cars about four meters long in general and I keep the scaling the same 11:52.060 --> 11:52.560 in blender. 11:52.560 --> 11:59.230 There's plenty of scope to do millimetre level stuff all the way up to the metre scale there so that's 11:59.230 --> 12:01.000 absolutely fine we can keep that the same. 12:01.000 --> 12:07.600 And similarly with the house you can keep that the same as well 10 blender units 10 meters absolutely 12:07.600 --> 12:07.990 fine. 12:07.990 --> 12:11.400 Obviously some houses are smaller than that and some can be much bigger. 12:11.410 --> 12:13.400 But that's absolutely fine. 12:13.450 --> 12:14.710 Next is an oil tanker. 12:14.710 --> 12:18.430 Now we start to get into the realms of very large objects here. 12:18.590 --> 12:23.110 Now a real sizeable tanker could be in 400 meters or so. 12:23.110 --> 12:24.810 Some are even bigger I think. 12:24.970 --> 12:30.880 But you certainly scale that down you would not work on a scale of 400 in blender as we sin when you 12:31.210 --> 12:34.910 when you approach 300 you start having problems anyway. 12:35.230 --> 12:41.150 So I would scale that model down now I'd either scale it down by a factor of 10 or 100. 12:41.320 --> 12:45.100 And that depends on the level of detail that I want. 12:45.100 --> 12:51.990 So in this case I get it down to four or maybe keep it up at 40 if I wanted that extra level of detail. 12:51.990 --> 12:55.090 It depends on its end application. 12:55.090 --> 13:01.270 Our bridge right Golden Gate Bridge is nearly three kilometres long for instance but you wouldn't want 13:01.270 --> 13:05.830 to make it three kilometres long in a blender 3000 blender units. 13:05.830 --> 13:06.930 That's going to be crazy. 13:06.940 --> 13:12.160 So you would scale that down and again depending on the level of detail you need it you could make it 13:12.160 --> 13:17.290 three blender units if it was something you were reviewing from a distance in a game or just a low poly 13:17.290 --> 13:18.970 model of it I suppose. 13:19.060 --> 13:23.810 But if you wanted more detail you probably bump it up to 30 blender units. 13:23.920 --> 13:30.380 So it would be slightly larger than our arm grid that we start with but that's absolutely fine. 13:30.700 --> 13:32.530 Now finally the earth. 13:32.560 --> 13:35.180 Now that's a big big object. 13:35.180 --> 13:37.520 Twelve thousand kilometres. 13:37.570 --> 13:40.740 And it obviously we're going to be scaling that down. 13:40.780 --> 13:41.770 But how far. 13:41.770 --> 13:43.780 Again it depends on the level of detail. 13:43.780 --> 13:50.530 I certainly wouldn't go any larger than 120 and I'd probably keep it around 12 unless I needed an excess 13:50.530 --> 13:51.980 amount of detail. 13:52.030 --> 13:58.420 But once you start needing a lot more detail one of the things to remember is you can always produce 13:58.510 --> 13:59.660 another model. 13:59.830 --> 14:03.680 So for instance let's take this earth as a quick discussion point. 14:04.150 --> 14:05.440 So let's talk about scale. 14:05.440 --> 14:07.330 Level of detail and models. 14:07.330 --> 14:14.090 So one model does not have to contain its old and use multiple models when necessary. 14:14.110 --> 14:17.370 So imagine you're zooming in from outer space. 14:17.440 --> 14:18.900 You're approaching the Earth. 14:19.030 --> 14:24.670 Well when you're far away you can use quite a low low poly model of the earth it just needs to be a 14:24.670 --> 14:27.250 sphere and then was zooming in. 14:27.250 --> 14:30.420 So it's going to have to get more and more detailed at some point. 14:30.580 --> 14:33.550 But we don't need to include all that detail. 14:33.580 --> 14:39.820 On the one of the earth there is millions of miles away before we reach it and we certainly don't need 14:39.820 --> 14:45.660 to include all the detail on the earth by the time we zooming in to the level of let's say a city known 14:45.710 --> 14:47.490 as we go more and more detail. 14:47.590 --> 14:49.750 We can focus on the bits that we need. 14:49.750 --> 14:55.330 Now you would have to make multiple models for each level of detail but that's absolutely fine. 14:55.330 --> 15:04.030 Think of the end in mind and you'd simply transition between these low detailed models to higher detail 15:04.090 --> 15:05.950 when you need to. 15:05.980 --> 15:07.920 Let's move on to the next lecture.