WEBVTT 00:00.940 --> 00:03.710 Welcome to texture resolution. 00:03.760 --> 00:10.990 So in this video you will understand that resolution will control the level of detail at a particular 00:10.990 --> 00:12.300 distance. 00:12.310 --> 00:17.220 We'll go ahead to realize when a texture is ever going to be too large or too small. 00:17.230 --> 00:21.340 We're going to learn about the power of two and wine. 00:21.370 --> 00:27.430 And when it is important so let's go from the bottom up and start with the power of two. 00:27.430 --> 00:29.720 So bit of theory for you all here. 00:29.740 --> 00:39.490 Computers work with binaries zeros and ones a lot of external programs need power off two textures that 00:39.490 --> 00:40.540 is important. 00:40.570 --> 00:47.440 Now they aren't necessary in blender but are a good standard to adhere to especially when working with 00:47.440 --> 00:56.060 external programs and they don't have to be square providing the length of the side is a power of two. 00:56.080 --> 00:59.950 So I've been saying paratroop character in some of you will be scratching your head. 01:00.040 --> 01:00.850 Go Mike. 01:00.850 --> 01:06.420 I kind of get these English words you've put up here but I don't understand what the power of two is. 01:06.430 --> 01:14.470 So which numbers are power of too severe Imagine a rectangle or a square and the length of four sides 01:14.500 --> 01:14.860 there. 01:15.040 --> 01:18.900 So mathematically they'll be two to the power of N.. 01:19.090 --> 01:23.730 Or as shown there two to the 5 etc equals thirty two. 01:24.010 --> 01:31.870 So if you've been around computers for a while you recognize this sequence 2 4 8 16 and so on and you'll 01:31.870 --> 01:37.540 notice that's your RAM will fall into those hard drives tend to fall into those lots of different things 01:37.540 --> 01:39.800 fall into these particular numbers. 01:39.970 --> 01:48.550 And this is where we do the power of to see you can have two five six on one length off of side by a 01:48.550 --> 01:50.280 thousand and 24 and another. 01:50.350 --> 01:54.400 Or you can have a thousand and twenty four by a thousand and twenty four and it be square. 01:54.400 --> 01:56.680 Each one of those is okay. 01:56.920 --> 02:02.200 Now it is important that you can't have it here to these standards especially if you want to export 02:02.200 --> 02:08.800 your Textus But there is one critical thing to remember because it's very tempting to say on let's say 02:08.800 --> 02:09.870 your diffuse smap. 02:09.880 --> 02:13.790 I don't need much detail here so I'll make it 32 by 32. 02:13.810 --> 02:21.190 It just needs a slight gradient change that set across it and then you go ahead and use a normal map 02:21.190 --> 02:26.140 let's say or a bump map displacement map to add more detail but you need that super fine detail so you 02:26.150 --> 02:28.240 do to 0 4 8 by 2 4 8. 02:28.300 --> 02:35.140 Now that is great but you're going to have a problem when you come to textures of different sizes. 02:35.140 --> 02:39.780 First of all they need their own you v map that is important. 02:39.780 --> 02:44.990 If you decide to have textures of different sizes within blender they're going to need their own e.v. 02:45.010 --> 02:45.600 Map. 02:46.550 --> 02:52.570 They're probably not going to be exportable even due to the need for multiple UV maps. 02:52.580 --> 02:58.250 Most programs when you import them say you're exporting as an effort because they'll take the primary 02:58.250 --> 03:02.720 the first you've Emap you've created and use that so the other textures. 03:02.720 --> 03:06.240 Obviously if they're a different size they won't match up with your you. 03:06.290 --> 03:12.000 Unwrap it is best to stick to one texture size for any given unwrap. 03:12.080 --> 03:18.170 So if you've unwrapped one particular model and you're going to give that to a 4 8 by 2 4 8 that is 03:18.170 --> 03:25.260 great and you can of course do another model that's not doesn't have to be as detailed and do it 5 hour 03:25.280 --> 03:26.390 by 5 12. 03:26.390 --> 03:28.820 You're going to have to play with these and it does. 03:28.870 --> 03:33.740 There are several things to think about when you're dealing with textures of what size you're going 03:33.740 --> 03:34.890 to require. 03:35.040 --> 03:39.890 I will go on sibor offer in a moment but the important thing to remember here is larger textures require 03:39.890 --> 03:41.220 more memory. 03:41.240 --> 03:49.880 If you had a texture that there is 256 pixels by 256 pixels and one that was 512 by 512 you may think 03:49.880 --> 03:51.740 the difference there is two it's not. 03:51.770 --> 03:52.940 It's quadrupled. 03:52.940 --> 03:58.430 That's going to take up quadruple the amount of space as the two five six one is and so forth as we 03:58.430 --> 04:01.300 go up that number change that we saw a moment ago. 04:01.670 --> 04:06.590 Okay so what size textures and this is a very good question. 04:06.620 --> 04:12.380 It's very tempting to just say you know what I'm going to use the largest size textures I can possibly 04:12.380 --> 04:12.730 use. 04:12.740 --> 04:14.390 Then nothing can go wrong. 04:14.390 --> 04:20.110 Well as you'll learn and develop skills you'll find that you run out of memory very quickly. 04:20.180 --> 04:26.030 If you decide to make the largest possible textures or blender will slow to a crawl or your game won't 04:26.030 --> 04:28.660 work it won't be able to load into the graphics memory. 04:28.660 --> 04:31.260 There's lots of different problems you can come to. 04:31.460 --> 04:38.780 So there are two main components to how large a texture needs to be and they're quite logical when you 04:38.780 --> 04:39.870 think about them. 04:39.890 --> 04:44.530 So first of all how far away is the camera from the object. 04:44.630 --> 04:47.460 Slash the texture that you were using. 04:47.630 --> 04:51.210 Of course camera you can place that with character. 04:51.250 --> 04:53.670 If you were in a game situation. 04:53.810 --> 04:58.550 So if you're looking at a building that's across the street but you're never going to get any closer 04:58.550 --> 05:03.470 to it there's going to be a finite amount of detail that you can actually resolve. 05:03.580 --> 05:10.220 And so there would be no point for instance probably going to eight fouls and it depends on the size 05:10.220 --> 05:15.040 of the objects as well so these two oscillate between one another. 05:15.040 --> 05:16.490 So we do need to be careful. 05:16.490 --> 05:20.660 I was going to say it doesn't matter you shouldn't go for an 8 k texture. 05:20.660 --> 05:26.270 Well actually you might need to if the object is really really big of course then you may split it up 05:26.300 --> 05:28.680 into smaller objects itself. 05:28.790 --> 05:33.930 But for instance kitchen tiles now they're a lot smaller but you get a lot closer to them. 05:34.310 --> 05:41.390 So what we have decided to go for here is thinking about what's that retina texture level. 05:41.400 --> 05:45.760 Now we've all heard of Apple's retina displays where you can't see the pixels. 05:45.860 --> 05:53.240 So we're going for a an utmost upper limits that your texture size would be and things beneath that 05:53.480 --> 05:54.830 would be okay. 05:54.950 --> 06:00.740 So the retina limit is really pushing it because that is when you can no longer see the pixels on your 06:00.740 --> 06:01.520 texture. 06:01.520 --> 06:05.130 In fact after that point you just wasting memory. 06:05.150 --> 06:08.150 So what is the retina texture level. 06:08.270 --> 06:16.670 Will the retina texture works out roughly to be three thousand two hundred sixty six times that tan 06:17.090 --> 06:18.900 of the size over distance. 06:18.900 --> 06:24.290 Now you can actually use Google you can type that into Google and replace size and distance and it will 06:24.290 --> 06:29.700 give you a sort of a texture size as it were that you could use. 06:29.750 --> 06:36.950 And then we need to actually round that up or down to the nearest power of two that would work for it. 06:36.950 --> 06:42.130 Hey it's Michael from the future here and we've had quite a few questions regarding this formula. 06:42.290 --> 06:46.520 Your calculator has been in radians in order for this to work. 06:46.670 --> 06:51.080 If you don't have a calculator that can go into radians or you don't know what that is or how to get 06:51.080 --> 06:51.500 there. 06:51.530 --> 06:58.640 You can use 57 times the tan of the size from a distance and that will work it out. 06:58.660 --> 07:00.870 If you can is in degrees. 07:01.370 --> 07:05.480 And of course there is one final thing here and that we haven't met. 07:05.520 --> 07:11.780 Im actually measured or spoken about and that is the importance of the texture or object. 07:11.780 --> 07:18.800 If it's something that's not really brought into the player's attention or the camera's attention it's 07:18.800 --> 07:22.550 something off to one side it's not the focal point of your scene. 07:22.670 --> 07:27.040 You can probably get away with a lot lower texture quality than otherwise. 07:27.050 --> 07:34.060 And you see this a lot in games where perhaps the scenery is not as textured in certain places as others. 07:34.190 --> 07:40.700 And the characters tend to have a lot more detail in them then perhaps a mug that they're going to pick 07:40.700 --> 07:41.110 up. 07:41.120 --> 07:44.380 You see this all the time and that is important. 07:44.390 --> 07:45.930 You don't want to make something. 07:46.190 --> 07:50.810 Incidental on the side or you might depending on the quality level you're going for but you don't want 07:50.810 --> 07:52.850 something that's incidental on the side. 07:52.850 --> 08:01.130 Having the same sort of quality level as the main object and the main focal point of the scene now obviously 08:01.130 --> 08:06.890 that's that's your discretion whether you go to that level of detail with other objects in your scene 08:06.890 --> 08:07.460 as well. 08:07.520 --> 08:14.480 If you're going for a more photo realistic feel where for instance a mug is completely circular you 08:14.480 --> 08:20.600 can't see any of the jagged edges going around making up that then then that's absolutely fine. 08:20.600 --> 08:26.720 Just bear in mind the higher level of detail the longer you're going to have to be working on that particular 08:26.720 --> 08:27.320 model. 08:27.380 --> 08:30.860 And let's say we do take the mulga example forward. 08:30.950 --> 08:36.530 The last thing you want to do is spend all of your time modelling a mug when you could have been modelling 08:36.530 --> 08:39.710 the main character that everybody's watching says worthwhile. 08:39.710 --> 08:41.320 Bearing that in mind as well. 08:43.010 --> 08:45.590 As with most lectures we've got a challenge. 08:45.620 --> 08:48.040 I would like you to calculate the following. 08:48.110 --> 08:53.720 Now I'm going to be a bit loose on this one and allow you guys to actually pick the size and distance 08:53.750 --> 08:56.400 that some of these objects are going to be from you. 08:56.420 --> 08:59.800 So play with them and see what you come out with. 08:59.810 --> 09:07.520 Remember if you're going to use MM meters kilometres in the case of the moon there remember that the 09:07.520 --> 09:10.490 size and distance have to be in the same units. 09:10.490 --> 09:13.320 Otherwise it's not going to work out. 09:13.460 --> 09:16.120 So balls of video now and give that a go. 09:18.480 --> 09:19.240 Okay guys. 09:19.260 --> 09:20.250 Welcome back. 09:20.250 --> 09:22.900 Let's go through and fill out this table. 09:24.180 --> 09:31.960 Okay so the first thing the moon has a set things are going to go die and mitts of the moon. 09:32.010 --> 09:32.610 Okay. 09:32.610 --> 09:34.350 So we are going to look this one up. 09:34.350 --> 09:38.990 I don't know zarmina Plock that in the table sets 3 4 7 4. 09:39.030 --> 09:39.880 Okay. 09:39.900 --> 09:42.470 And I'm going to change that to distance. 09:43.380 --> 09:44.980 That's not grammatically correct. 09:45.030 --> 09:47.060 I'm sure Google worked out for me. 09:47.270 --> 09:49.350 So three. 09:49.660 --> 09:51.580 Wow that's a long way away isn't it. 09:51.580 --> 09:53.040 It's going to take us a while to get there. 09:53.050 --> 09:59.550 So now I know that I can actually plonk in my equations that was three to six six times. 10:00.480 --> 10:02.010 Men tan. 10:03.200 --> 10:07.910 I can group that together there and I don't feel fancy the open book open bracket. 10:07.920 --> 10:08.930 I need it here. 10:09.090 --> 10:15.240 So tan and we need to go in and do size over distance. 10:15.320 --> 10:20.700 So that's 3 4 7 4 over. 10:22.300 --> 10:25.150 3 7 0 3 0 0 0. 10:25.650 --> 10:28.520 That'll give us a result of 30. 10:28.540 --> 10:29.410 So there you go. 10:29.410 --> 10:30.490 That is quite low. 10:30.500 --> 10:36.050 So that's going to be 32 by 30 you can actually get away with 32 by 30 to texture. 10:36.130 --> 10:43.450 If you were standing on the planet looking at the moon because it doesn't take up much size just make 10:43.450 --> 10:46.520 sure I got my dimensions the right way round there. 10:47.590 --> 10:53.500 So I've got size over distance so size over distance brilliant case building. 10:53.530 --> 11:02.860 I'm going to pick a hundred meters tall building and I'm going to be stood at a distance of a kilometre 11:02.860 --> 11:03.480 away. 11:03.640 --> 11:08.880 So I'm going to be stood at a foul a thousand meters and 100 meters. 11:08.900 --> 11:13.880 So then we go up and hit the back button here and hopefully know how. 11:13.890 --> 11:14.410 There we go. 11:14.410 --> 11:20.740 I've got my equation so I'll be 100 over a thousand So this is one of these things we can leave open 11:20.740 --> 11:23.380 in a tab here and we get back to it. 11:23.410 --> 11:25.490 So that's 327. 11:25.520 --> 11:27.070 Now this is a good one isn't it. 11:27.190 --> 11:30.770 I've picked something where the power of two is ended up halfway in between. 11:30.880 --> 11:33.490 So I've got to make a decision at this point. 11:33.510 --> 11:38.710 Well not necessarily at this point but I feel at this point whether or not I'm going to get any closer 11:38.710 --> 11:44.110 to the building if I am going to go for five 12 or I could probably get away with 2 5 6. 11:44.110 --> 11:46.600 Remember these are retin-a pixels. 11:46.600 --> 11:51.550 So at this point you as the viewer would not be able to see any of those pixels. 11:51.550 --> 11:54.020 It would be perfectly resolved. 11:54.040 --> 11:58.490 So in that case I'm going to go for two hundred and fifty six. 12:00.340 --> 12:02.040 Okay a kitchen tile. 12:02.050 --> 12:04.990 Well I'm going to do that in centimetres. 12:05.020 --> 12:08.940 I'm going to remember to put my units in here as well that is very important. 12:09.070 --> 12:10.850 Okay so a kitchen tile. 12:10.840 --> 12:15.840 I'm looking at kitchen tiles at the moment and they're about 10 centimetres across. 12:16.000 --> 12:23.380 So 10 centimetres and a distance Well if I was washing up I'm going to be stood roughly about 90 centimetres 12:23.380 --> 12:24.260 away from it. 12:24.400 --> 12:29.300 So I'm up to about a meter depending on where I am going to go for 90 to me. 12:29.380 --> 12:30.840 So I lean forward. 12:31.000 --> 12:33.040 Let's go for 70 centimetres. 12:33.040 --> 12:39.250 I'm picking at a dish from the from the liquid there that's so that's going to be 10. 12:39.400 --> 12:43.240 So I can adjust these figures here 10 over 70. 12:43.270 --> 12:43.930 Okay. 12:44.790 --> 12:46.180 Let's see what we've come up with here. 12:46.320 --> 12:49.680 Okay so that's close to 512 k. 12:50.750 --> 12:54.110 And finally a car well a car is approximately where. 12:54.140 --> 12:55.850 Depends where you are in the world. 12:55.850 --> 13:01.160 I've driven a smart car that's very tiny and I see some American cars like a Humvee or something like 13:01.160 --> 13:03.170 that are huge. 13:03.200 --> 13:06.190 So I'm going to go for a four meter car. 13:06.410 --> 13:08.090 So for me it's a car. 13:08.110 --> 13:12.850 Now if you let's say walking along the pavement then this is the distance thing again. 13:13.010 --> 13:20.910 So the car's never going to be any closer to me than let's say a meter but it's four meters long. 13:20.950 --> 13:23.350 Okay let's see what that works out to us. 13:23.420 --> 13:27.860 So for meters and by a meter. 13:28.070 --> 13:28.480 Okay. 13:28.490 --> 13:36.960 This one ends up very large in fact that is closer to 4 0 9 6 than it is anything else. 13:38.090 --> 13:39.900 So let's bring up my chart here. 13:40.860 --> 13:42.840 Now did any of the shock you. 13:42.840 --> 13:47.540 Did you think for instance that the moon was going to be a lot higher than 32. 13:47.540 --> 13:54.620 By 32 in order to accomplish a sort of retina level that did shock me and the car was particularly high. 13:54.620 --> 13:57.400 I wasn't expecting it to go quite that high. 13:57.660 --> 14:03.100 The building didn't puzzle me too much I thought that would be around sort of 2 5 6 5 12. 14:03.150 --> 14:08.520 I didn't anticipate the kitchen towel being quite the higher thought because it was quite a small object 14:08.760 --> 14:10.680 be able to get away with a lot lower. 14:10.680 --> 14:16.780 Now remember it is very important but these are retina level textures. 14:16.860 --> 14:23.280 You could probably get away with a lot lower than these probably half of these themselves. 14:23.490 --> 14:25.860 I hope that's you found that incredibly useful. 14:25.860 --> 14:28.830 Did you come up with some other size and distances. 14:28.830 --> 14:34.350 Did you come up with some crazy figures and just as a side note here most game engines at the moment 14:34.380 --> 14:39.710 don't support over eight thousand odd by eight thousand odd pixels. 14:39.720 --> 14:46.860 So you can't go much higher than that without causing yourself some memory problems so that's worthwhile. 14:46.860 --> 14:52.230 Bearing that in mind I'd love you to share your results if you came out of anything wacky there. 14:52.320 --> 14:55.040 And I will see you in the next lecture.