WEBVTT 00:00.540 --> 00:07.980 Now that we have a good overview of what shaders are, what type of textures there are procedural and 00:07.980 --> 00:13.620 photographic and what that means, and we have our scene set up, let's dive into the meat of this course 00:14.370 --> 00:20.250 as far as shading goes and create these shaders for this Ghostbuster trap so it doesn't look all chromed 00:20.250 --> 00:22.230 out and crazy looking right now. 00:23.310 --> 00:29.220 So let's jump into this shader, which is the one that we've already created and. 00:30.480 --> 00:36.480 One thing I'm going to do to make our lives a little easier is to actually turn on a feature here, 00:36.480 --> 00:39.270 which is we can actually control the 3D view in the viewport. 00:39.270 --> 00:44.130 So I'm not having to constantly move this to the side and then navigate in here and then move this back 00:44.580 --> 00:47.610 so I can go to window 3D manipulation. 00:47.910 --> 00:54.240 And now you can see that I can actually rotate around in here and it will also update the viewport behind 00:54.240 --> 00:59.580 it so that I'm not having to switch back and forth between the two views in this course. 01:00.000 --> 01:07.440 So I'm going to delete the history on this so that we can get to the shader a lot quicker in the tabs 01:07.440 --> 01:07.830 up here. 01:08.280 --> 01:12.150 And the main thing that's wrong with this is, of course, the reflection. 01:13.050 --> 01:15.080 It's way too reflective, of course. 01:15.090 --> 01:16.230 Yeah, it's a metal material. 01:16.230 --> 01:25.950 But if you think about like a painted metal and consider the two surfaces, if you used a microscope, 01:26.490 --> 01:33.300 chrome piece of metal is going to be pretty smooth and a painted material is going to have all the grooves 01:33.300 --> 01:37.440 of the brushstroke and it's going to look a lot more rough on a microscopic level. 01:37.860 --> 01:45.600 That microscopic level actually impacts how the light bounces off of this surface and makes it reflect 01:46.440 --> 01:49.410 very accurately or more roughly. 01:50.220 --> 01:57.060 So you can see it's almost like a perfect mirror because we can see these reference balls in the side 01:57.060 --> 02:04.180 of the the object here, which we can also select individual objects from the Arnold render view. 02:04.470 --> 02:09.120 So with that selected, I'm also going to delete the history on that one so we can get to it a little 02:09.120 --> 02:09.560 easier. 02:10.230 --> 02:14.670 And so we want to increase the roughness and. 02:16.130 --> 02:17.540 That will get us pretty far. 02:18.660 --> 02:27.990 But we also want to make the color, you know, a lot more dark, and we've already gotten pretty far 02:27.990 --> 02:29.700 just with those two small adjustments. 02:30.570 --> 02:37.410 So the other thing to consider once we start shading things are the textures that we're going to use. 02:37.410 --> 02:42.380 And since we know procedural textures are pretty powerful and we don't have to go on to any other program, 02:42.630 --> 02:44.440 let's use those to add more detail. 02:44.850 --> 02:50.550 So if you look at the surface of this thing, it's pretty smooth and it looks kind of perfect. 02:50.880 --> 02:56.430 And any time and CG, you're always trying to fight against perfection because whenever you create a 02:56.430 --> 03:02.520 surface or a sphere, it's going to be perfectly round and the shaders and textures are always going 03:02.520 --> 03:03.170 to be perfect. 03:03.480 --> 03:07.110 So we want to break this up a little bit. 03:07.110 --> 03:09.690 And to do that, we can add up. 03:10.140 --> 03:11.490 There's a couple of different ways we could do it. 03:11.500 --> 03:16.710 We could start to add textures to these attributes by clicking the checkbox. 03:17.190 --> 03:21.690 The first one that we could try is a fractal on the roughness. 03:21.990 --> 03:29.040 So that'll break up how the surface is maybe shinier in some spots and rougher and others. 03:29.470 --> 03:36.690 So let's click this checkbox and we get the render node open and we can go down to fractal here. 03:36.900 --> 03:39.600 And this is one of the most common ones that I use. 03:40.050 --> 03:46.650 I rarely use pretty much anything else besides opening a file and using fractals. 03:46.710 --> 03:48.540 Sometimes I'll use noise, but not really. 03:48.810 --> 03:56.400 Ramp is also very useful, but for the most part, I don't really use any of these besides fractal. 03:56.400 --> 03:59.820 You can get you can get a lot out of fractal and that's what you'll learn in this lesson. 03:59.820 --> 04:02.430 And the next one is it's very versatile. 04:02.460 --> 04:07.770 So we'll click that and we can see that something happened, but we can't really tell what. 04:08.170 --> 04:13.530 So we need to isolate this fractal so we can actually see the texture. 04:13.530 --> 04:13.890 If we right. 04:13.890 --> 04:17.760 Click here, we can see, you know, it's black and white and there's a lot of stuff going on. 04:17.760 --> 04:21.720 But we can't really see that here because it's being applied to the roughness channel. 04:22.050 --> 04:28.740 So for us to see that we need to open up the hyper shade and the hyper shade is something new that we 04:28.740 --> 04:29.550 haven't opened yet. 04:29.730 --> 04:32.040 And it's this little button up here. 04:32.490 --> 04:34.350 And if we click, that will open up a new window. 04:35.040 --> 04:40.380 And your eye shade might look a little different because I've closed down some of the windows that I 04:40.380 --> 04:41.970 don't use that often. 04:42.060 --> 04:48.300 You could go in here and click these Xs and close down what you don't want and open them back up here. 04:48.330 --> 04:53.250 Like, for example, I believe I've closed down the material viewer so we could get that back and we 04:53.250 --> 04:55.380 could dock that in this window. 04:56.320 --> 05:03.400 Like so and I believe this might be closer to what the default view is, but I like to see it in the 05:03.400 --> 05:07.870 actual view that we're doing and we might have more materials later. 05:07.900 --> 05:08.830 So I just closed that one down. 05:08.830 --> 05:13.540 But you can get back to all those things right here and then dock them in this window if you want. 05:13.570 --> 05:19.240 You could also dock this in the viewport or right next to the viewport, that is. 05:19.720 --> 05:24.370 But for our purposes, I'm just going to leave it open so we can kind of slide this around so we can 05:24.370 --> 05:25.220 see everything. 05:25.270 --> 05:30.140 Let's let's take a look at how we can isolate the fractal here because we can't see it. 05:30.580 --> 05:37.950 So what we want to do is map the shader that we've created in this window here. 05:37.960 --> 05:43.000 And to do that, we need to have an object selected and we need to click this little button right here 05:43.300 --> 05:45.790 that has graph materials on selected objects. 05:46.000 --> 05:47.320 So we have our object selected. 05:47.590 --> 05:49.090 Let's graph those materials. 05:49.310 --> 05:55.060 So for our purposes, what we've dealt with so far has just been this object basically, and it's displaying 05:55.060 --> 05:58.540 all this information that we've already seen over here. 05:58.540 --> 06:00.160 And it's displaying in a different way. 06:00.430 --> 06:05.170 And we can see the input connections and the output connections. 06:05.710 --> 06:09.220 And it might look pretty complicated right now. 06:09.220 --> 06:11.970 But in reality, you've already seen all of this. 06:11.980 --> 06:15.250 It's just displayed a little differently over here and the attribute, Ed.. 06:15.700 --> 06:21.820 So this is just another way to visually see this stuff and a little more quickly select different nodes. 06:22.060 --> 06:23.830 Each one of these things is called a node. 06:24.280 --> 06:33.040 And so basically the fractal is being piped into the roughness and the fractal has a 2D texture placement 06:33.040 --> 06:33.610 node. 06:33.610 --> 06:41.500 And that just basically says, hey, this texture is going to be placed on UVs in a certain way, is 06:41.500 --> 06:45.160 going to repeat so many times it's going to be mirrored, it's going to, you know, whatever else. 06:45.700 --> 06:48.430 So it looks more complicated than it is. 06:48.430 --> 06:51.160 And you've already seen all this information, but just in a different format. 06:51.160 --> 06:54.760 So don't get too overwhelmed with this view yet or ever. 06:55.960 --> 07:01.840 So with that selected, we can actually go to this little button and the Arnold render and isolate that 07:02.020 --> 07:06.460 texture, which is like a lifesaver because this is a newer thing. 07:06.730 --> 07:08.470 They haven't had this for forever. 07:08.480 --> 07:12.930 So now we can see what we're actually doing with the fractal texture. 07:13.390 --> 07:16.300 And if we we can turn that on and off here. 07:17.050 --> 07:25.470 And the main thing that we want to consider is when we piped in this fractal, you know, and it's a 07:25.510 --> 07:31.480 black and white image, if you notice closely here, it's actually outputting not the color, but the 07:31.480 --> 07:39.820 alpha, because the specular roughness will only accept one value and a color is combined of red, green 07:39.820 --> 07:40.380 and blue. 07:40.900 --> 07:45.280 So when you try to output a color, it's looking for three things to output into. 07:45.760 --> 07:55.330 But because roughness is of one value, we can see by the slider on the shader itself, it's not like 07:55.330 --> 07:56.050 the color value. 07:56.050 --> 07:59.860 This would have RGB, but this is a single value, right? 08:00.070 --> 08:01.960 Just like roughness is going to be a single value. 08:01.960 --> 08:05.650 So it's outputting the Alpha and the Alpha. 08:05.650 --> 08:10.680 If you're not familiar with images and Photoshop and all that kind of a thing, Alpha just means transparency. 08:11.230 --> 08:11.890 So. 08:13.010 --> 08:17.810 The Alpha is being interpreted as roughness, but. 08:19.040 --> 08:27.530 The alpha is pure white, basically, um, you know, we're looking at a black white image, but it's 08:27.530 --> 08:30.920 using the alpha, so it's not really doing what we want it to do. 08:31.220 --> 08:39.620 We want to use the color information we could map in just the AH and just choose one of these three 08:39.620 --> 08:40.280 channels. 08:40.700 --> 08:45.920 And as soon as we do that, you can see this update and now we get to see that fractal effect, the 08:45.920 --> 08:46.450 roughness. 08:47.000 --> 08:56.120 So the one disadvantage of using just a single channel is that we do not have access to kind of global 08:56.120 --> 09:00.500 controls to increase or decrease the this channel. 09:01.280 --> 09:07.880 But if we use the Alpha and we just pipe the Alpha in again, it'll go back to not being able being 09:07.880 --> 09:08.390 visible. 09:08.900 --> 09:13.100 But if we pipe that in, we actually have these alpha gain, an alpha offset controls. 09:13.460 --> 09:16.450 So if we use this is kind of the key here. 09:16.460 --> 09:18.470 Remember, this alpha is luminance. 09:18.980 --> 09:28.160 When I click that and that basically will say, hey, use the alpha channel or use the luminance of 09:28.160 --> 09:29.780 the channel for the Alpha. 09:29.780 --> 09:34.820 So because it's just black and white, you're basically just copying all this color information because 09:35.000 --> 09:35.780 there is no color. 09:35.780 --> 09:38.900 It's just, you know, a value from zero to one. 09:39.290 --> 09:41.000 It's piping that into the alpha now. 09:41.390 --> 09:44.210 So that's the kind of trick to do here. 09:44.210 --> 09:50.960 And the reason why we're using Alpha and not just the ah channel or the are the Green Channel or the 09:50.960 --> 09:58.670 Blue Channel is because we have these two sliders here and we can control with one control the effect 09:58.670 --> 10:00.020 of this texture. 10:00.500 --> 10:06.250 Whereas if we used the Red Channel, there is no, you know, Red Channel controller here. 10:06.260 --> 10:06.680 Right. 10:06.980 --> 10:10.000 So that's why we need to use the alpha channel for the fractal. 10:10.490 --> 10:15.740 And I know that might seem a little complicated, but, you know, read watch this, create this yourself, 10:15.740 --> 10:20.810 follow along so that you kind of ingrain this in your mind because this is going to come up again and 10:20.810 --> 10:21.230 again. 10:21.470 --> 10:24.350 And fractals are something that's used quite often. 10:24.620 --> 10:30.920 So you want to get comfortable with understanding why this is the case, why we're using the Alpha and, 10:30.920 --> 10:36.860 you know, user use the R if you want to use a G, it doesn't really matter because it's just black 10:36.860 --> 10:37.370 and white. 10:37.370 --> 10:40.760 So whatever color channel you use, that's fine. 10:40.760 --> 10:44.650 But then you'll get stuck into a position where you're like, you know what, I just want to Dallas 10:44.690 --> 10:49.940 back just a touch and then you'll be totally stuck because there is no control like that on the fractal 10:49.940 --> 10:50.270 note. 10:50.720 --> 10:52.100 And that's why we're using Alpha. 10:52.300 --> 10:55.430 OK, so I think that's hopefully you understand that now. 10:55.850 --> 10:57.050 But so look at this. 10:57.050 --> 10:59.540 You know, we added a ton of detail and one node. 10:59.870 --> 11:07.040 So if we go back, we can see that now this object doesn't look perfect like it did before. 11:07.300 --> 11:10.700 It looks maybe a little worn and and whatnot. 11:10.700 --> 11:13.430 So in this lesson, we've gone really far. 11:13.430 --> 11:14.150 We've learned a lot. 11:14.150 --> 11:15.440 We learned about the Hypercharged. 11:15.710 --> 11:19.460 We learned how to create a little more texture here. 11:19.790 --> 11:25.580 And in the next lesson, we're going to create an entirely new material and maybe tweak this fractal 11:25.580 --> 11:26.120 a little bit. 11:26.360 --> 11:34.190 But the next thing we're going to create is this brushed metal shader here that you can see in the reference. 11:34.940 --> 11:38.100 So I'll see you in the next lesson where we will try to create this shader. 11:38.150 --> 11:38.540 All right. 11:38.540 --> 11:39.200 Thanks for watching.