WEBVTT 00:00.180 --> 00:04.840 Welcome to lamps verses in missive materials in cycles. 00:05.160 --> 00:10.590 So in this video you will learn the differences between the two light sources when using the cycles 00:10.590 --> 00:15.700 render engine understand that there is a time and a place for both. 00:15.700 --> 00:22.260 They both have pros and cons and finally will go on to use the blackbody node. 00:22.260 --> 00:25.010 So let's hop straight on over in a blender. 00:26.170 --> 00:32.500 Okay so we have our lamp here and if we render it as we had it a few moments ago we notice there's no 00:32.500 --> 00:36.130 lights coming to it so we do want a light bulb inside our lamp. 00:36.280 --> 00:42.760 Now there's a couple of ways how we can simulate this happening so we've got the three curse a 3D cursor 00:42.760 --> 00:50.300 set there at the moment so we can literally go ahead and add a lamp into our scene. 00:50.320 --> 00:52.020 That is a spot light. 00:54.110 --> 01:00.060 Let's change this to solid for a moment so we can see the direction of the spotlight is currently down. 01:00.110 --> 01:07.180 So I'm going to rotate that 45 degrees yes but it's roughly the right size as well. 01:07.280 --> 01:12.300 Over in the spotlight options you can change a couple of items here. 01:12.470 --> 01:19.370 It's strength we can see it's an admission that the colour coming out of it this size of the spot itself 01:20.200 --> 01:22.070 and there are couple of other options there. 01:22.130 --> 01:25.720 So let's just render that out and see what happens in faith. 01:25.730 --> 01:33.620 I'm going to just render this area here where the lamp light is falling and we can see we get a relatively 01:33.620 --> 01:37.830 clean lighting effect quite quickly. 01:39.040 --> 01:42.220 Let's just move it around a little and see how that comes out. 01:42.460 --> 01:49.540 Yes he's looking quite good but we're already at 30 with the number of samples accounting up here I've 01:49.540 --> 01:52.260 raised my preview to about 100. 01:52.330 --> 01:58.330 That's not bright enough so we can increase the strength here a little and see what we get then. 01:58.450 --> 02:01.150 So that should give us twice the amount of light. 02:01.360 --> 02:09.380 And in fact we can see there's a hole here and it looks like our position the lamp behind some think 02:09.380 --> 02:11.650 so it's actually causing a shadow. 02:11.770 --> 02:19.660 But you can see very quickly how we've got a nice quick defined line and it's not taking too long to 02:19.660 --> 02:27.790 get out a spots on the floor but it's not as accurate as a mesh emission would be. 02:27.790 --> 02:30.720 So there's places for both of these. 02:30.720 --> 02:36.870 The actual bit of our scene that's lighting the main scene this plane over here in the sky. 02:36.880 --> 02:40.930 This one here that is in a mission plane. 02:41.020 --> 02:43.620 And it's basically casting light across our scene. 02:43.810 --> 02:50.330 However if we want our spot light to be quite accurate we may use a lamp to do it. 02:50.500 --> 02:55.600 So let's just let that render out now and see what it looks like after 100 samples. 02:57.090 --> 03:04.440 In fact before we go and do that I'm not going to let let you be bored to much watching 100 samples. 03:04.440 --> 03:08.420 I'm literally just going to hop in here and move our lamp. 03:09.430 --> 03:10.930 Oh wrong lamp move. 03:10.930 --> 03:17.030 The spot lights just move it's down a little to where a bulb would be. 03:17.300 --> 03:17.660 Okay. 03:17.650 --> 03:18.210 Brilliant. 03:19.000 --> 03:22.350 So let's see how that works out when it's rendered. 03:27.360 --> 03:29.280 Okay so we've reached a hundred samples there. 03:29.310 --> 03:36.000 That's a really really crisp image really crisp spot light sorry that's going on there so I really like 03:36.000 --> 03:36.510 that. 03:36.540 --> 03:45.150 In the case of here if I wanted to use that I would attach it to the lamp itself parent it to the lamp 03:45.150 --> 03:47.510 joint I think we've got everything going on there. 03:47.580 --> 03:49.140 Now we've had a look at that. 03:49.140 --> 03:52.730 Let's have a look at what an admission would be like. 03:52.890 --> 03:55.230 So I'm going to hide our spotlight. 03:55.230 --> 03:58.410 In fact I'm just going to delete it from the scene for the moment. 03:58.440 --> 04:01.350 So it's not there at all not going to cause any problems. 04:01.470 --> 04:04.600 And I'm going to use a circle. 04:05.640 --> 04:07.740 So it's not too complicated mesh. 04:07.740 --> 04:09.720 There's a circle. 04:09.810 --> 04:12.720 I'm going to have to scale that in. 04:12.720 --> 04:13.860 I don't know how small. 04:13.860 --> 04:15.840 Probably Oh point eight again. 04:15.840 --> 04:17.940 That seems to be a good number at the moment. 04:18.120 --> 04:22.300 I'm just going to turn off render mode for a moment as well. 04:22.500 --> 04:27.140 Okay so I'm going to have to rotate that around the x axis by 45 degrees. 04:27.360 --> 04:30.040 I'm going to go to the side view again. 04:31.480 --> 04:38.960 To see and move that down to around the same place as our lamp was and I'm going to hop into wireframe 04:38.960 --> 04:40.230 mode to see where that is. 04:40.250 --> 04:41.450 That's absolutely fine. 04:41.450 --> 04:44.070 Now the moment is just a circle. 04:44.120 --> 04:47.660 So what we're going to have to do is fill the circle in. 04:47.900 --> 04:50.540 So it's got a face to it. 04:50.570 --> 04:54.570 Now I'll hop into edit mode and add a face. 04:54.740 --> 05:00.500 Now that looks like the face is actually the wrong way round but it doesn't matter at this moment in 05:00.500 --> 05:06.100 time but there is an option that will make sure that the light only comes from one side of the plane. 05:06.110 --> 05:07.790 We will worry about that at the moment. 05:07.790 --> 05:11.650 We've got that set there and let's create a new material. 05:12.900 --> 05:14.770 And I'm going to call it light bulb. 05:16.880 --> 05:19.190 And it's going to be in a missive material. 05:20.950 --> 05:25.080 And there it is on the node editors hiding away out of the way. 05:25.080 --> 05:30.550 So I want to introduce you to this colour value here you can actually change the colour of the light 05:30.550 --> 05:31.560 coming off of here. 05:31.690 --> 05:33.900 And by default it's set to white. 05:33.910 --> 05:36.010 Now we can control that colour values. 05:36.010 --> 05:39.140 You can see there's a little entry point for it here. 05:39.310 --> 05:47.590 So if we go in ad and it's all the way down at the bottom yet converter you can see here we've got a 05:47.590 --> 05:53.280 black body and what that does is it enables us to give a colour temperature. 05:53.530 --> 05:59.260 So if we link the colour outputs or the colour inputs of emission we can change the temperature of the 05:59.260 --> 06:04.380 colour see if you know you've got a five thousand Kelvin lamp. 06:04.390 --> 06:06.870 It will actually produce the right coloured light. 06:07.090 --> 06:08.530 So now we've got that. 06:08.530 --> 06:11.310 We've got an emissions strength of one. 06:11.590 --> 06:18.290 Let's turn it up to 200 like the last lamp and let's render a similar scene as before. 06:22.250 --> 06:22.670 Okay. 06:22.700 --> 06:26.150 So that is a 100 sample render. 06:26.150 --> 06:33.290 And as you can see it's a lot more noisy than the last one although it is probably more physically accurate. 06:33.620 --> 06:39.170 Now we can play with the settings down here and perhaps increase the strength because it's quite a small 06:39.170 --> 06:40.350 surface area. 06:40.520 --> 06:47.510 And the way that light is calculated from an admission is the while this strength this value here is 06:47.930 --> 06:56.030 based upon the area of the surface itself as we saw with the large plane when we originally set that 06:56.030 --> 07:00.480 up for the lighting for the rest of the scene because it was so large we could get away with the strength 07:00.470 --> 07:01.760 of only five. 07:02.000 --> 07:05.280 But of course with this tiny bulb in the middle there. 07:05.440 --> 07:09.140 We have to make the strength much larger if we want to bring to light. 07:09.170 --> 07:10.480 So we see 100 samples. 07:10.490 --> 07:12.040 It's still very noisy. 07:12.200 --> 07:19.540 So over in the render properties here we can go down here and let's find samples. 07:21.130 --> 07:27.640 I think of whizzed past actually sample samples sample sample samples is sampling here we get so in 07:27.640 --> 07:29.390 the preview of it sets a hundred. 07:29.530 --> 07:32.950 I'm going to now up that to something silly. 07:32.950 --> 07:35.810 And of course Paul's video whilst it renders. 07:41.440 --> 07:47.370 So we're coming up to around a thousand samples now and it's actually looking. 07:47.540 --> 07:53.800 Dare I say a bit more realistic is not so such a concise spot and I don't think it would be coming out 07:53.890 --> 07:58.650 of a lamp like that but it's a much more even spread of light. 07:58.780 --> 08:04.640 Now I'm going to again pause a video but I'm going to just render the entire scene that we can see here. 08:10.510 --> 08:17.410 Okay so just after a thousand samples and it's been a about 10 minutes render at the moment this is 08:17.410 --> 08:23.020 just a viewport rendered not a camera based render like where we've done in the past and we can see 08:23.020 --> 08:26.110 we are getting more and more of a spot appearing. 08:26.200 --> 08:29.440 But it's taken an absolute age to do this. 08:29.500 --> 08:35.850 So for accuracy I mean we've got the bright light where it's closer and then it fading off. 08:35.860 --> 08:41.230 Obviously this is an orange background but the light itself is slightly orange as well from here. 08:41.530 --> 08:48.790 And you know there's an argument both ways one looks one is accurate because that's exactly the light 08:48.790 --> 08:54.300 you get out of that lamp shade whereas one is a fake spotlights so one's kind of faking it. 08:54.370 --> 09:00.850 But it does depend on what you want to do and the power of your machine and the time you've got to render 09:00.850 --> 09:01.410 it. 09:01.450 --> 09:05.500 Obviously the more complex a scene you you've got to do. 09:05.500 --> 09:11.550 I mean the other one had a realistic or not a realistic render a suitable render in 30 seconds or so. 09:11.550 --> 09:18.530 This is already at 10 and a half minutes and it's going to probably just keep on going and going. 09:18.730 --> 09:22.340 What have we got there another 15 minutes I am tempted to leave it to do that. 09:22.690 --> 09:28.700 But at the same time I want to get on with the next stage of this as well. 09:28.780 --> 09:31.160 So we'll leave it there for the moment actually. 09:31.380 --> 09:35.990 Whilst that's rendering in the background I'm going to give you a challenge. 09:36.010 --> 09:42.550 One quick thing that I'll mention before I do the challenge is that if we were to look inside the lamp 09:42.610 --> 09:50.200 at the moment there would be a light in there if we were to look inside of the lamp with only a lamp 09:50.350 --> 09:56.880 source a bit confusing with lamps and lamps here if we were looking inside the lamp. 09:57.010 --> 10:02.290 When we had the previous spotlight generating the lights coming out we wouldn't see anything. 10:02.290 --> 10:04.840 It would be dark inside the lamp shade itself. 10:04.930 --> 10:07.010 So there is a distinct difference there. 10:07.030 --> 10:10.900 So what you may want to do is do a small combination of both. 10:10.900 --> 10:16.240 So it may be not turn the emission up quite this high but just have it in there so there is a light 10:16.240 --> 10:16.860 source. 10:16.870 --> 10:23.170 So if the lamp were to ever look in the direction of the camera at least then there is something inside 10:23.170 --> 10:30.160 there because it would look a bit odd if when we were animating it you moved the lamp towards the camera 10:30.160 --> 10:31.720 perhaps to look at the camera. 10:31.990 --> 10:38.670 And then you find that it's dark inside there that would that would be a bit confusing for the viewer. 10:39.900 --> 10:46.180 Okay so your challenge is to add your light bulb choose your light source for the bulb. 10:46.410 --> 10:53.460 You can do both of course you can do a missive and a spotlight and then finally parent the light source 10:53.460 --> 10:55.960 appropriately so it moves correctly. 10:56.040 --> 11:00.930 When we move the lampshade pause video now and give that a go. 11:03.800 --> 11:04.630 Welcome back. 11:04.790 --> 11:08.060 Let's hop over in blender and sort that out. 11:08.600 --> 11:09.050 Wow. 11:09.050 --> 11:15.260 So back over in blender and I don't know if you can see what I'm seeing here but the screen's gone a 11:15.830 --> 11:22.520 little bit funny looks like when I move the mouse over it it all comes back was that bit coming back. 11:22.520 --> 11:22.960 I don't know. 11:22.960 --> 11:25.770 I don't know whether Blender's going to crash because of this. 11:25.940 --> 11:31.770 But I can still see it doing its render at the moment and it's not even reached at two thousand samples. 11:31.820 --> 11:38.450 I'm going to obviously move my model round in a moment to show you one can do and I'm going to stop 11:38.450 --> 11:39.400 that rendering. 11:40.950 --> 11:43.750 Going to solid to change to stop it there. 11:43.790 --> 11:50.440 But if we hop around now and have a look inside the lamp you will see that that circle that I generated 11:50.440 --> 11:54.290 when we actually look inside the lamp if I hit Brenda it's white. 11:54.310 --> 11:56.680 There is a light source there which is great. 11:56.680 --> 12:01.110 That's is what we want and hop back into solid mode. 12:01.120 --> 12:08.320 I'm going to use the origin of that some are going to move the cursor to their origins to shift S cursor 12:08.320 --> 12:09.720 to selected. 12:09.840 --> 12:11.420 I'm going to add. 12:12.630 --> 12:14.590 I'm in edit mode I don't want to be in edit mode. 12:14.600 --> 12:16.370 I'm going to come out of edit mode. 12:16.370 --> 12:19.280 I'm going to add a lamp. 12:20.420 --> 12:21.930 I'm being blind here lamp. 12:21.950 --> 12:24.410 There we go as spotlight. 12:24.490 --> 12:27.670 I'm going to take that round by forty five. 12:27.680 --> 12:31.750 I'm happy with the light it casts from there. 12:32.030 --> 12:36.550 And because we're working on the lamp now we can see we've got a lamp out on a mission. 12:36.570 --> 12:41.950 I'm going to set it to the same colour temperature as before some going to add a black body. 12:42.080 --> 12:44.200 So be a whole day body. 12:44.210 --> 12:44.880 There we go. 12:45.020 --> 12:47.420 And I'm going to link these two together. 12:47.430 --> 12:50.990 And of course fifteen hundred would be a very orange type light. 12:50.990 --> 12:53.320 I think we were at 5000 before. 12:53.330 --> 12:55.190 However I will check. 12:55.190 --> 13:00.150 So let's go to the circle that's on here five thousand. 13:00.170 --> 13:02.670 That's absolutely right Kate. 13:02.700 --> 13:04.780 So let's just do a very quick render. 13:04.790 --> 13:11.740 I'm going to use control and be to go around here and just hit render and see how that comes out. 13:11.810 --> 13:18.290 So we get a spot coming out plus all the other stuff in there so we can do to minimize that from happening 13:18.620 --> 13:18.990 is. 13:19.000 --> 13:22.840 We can go on to our circle and just turn the shrinks right down. 13:22.850 --> 13:29.190 So I set that Sue I'm going to do a 100 for the moment we still get a little perspective. 13:29.210 --> 13:31.210 But it's not going to cause us too much grief. 13:31.310 --> 13:34.460 And when we look inside the lamp we've still got some. 13:34.640 --> 13:39.450 I'm looking at it through the rest of the back drop there. 13:39.890 --> 13:40.180 Okay. 13:40.190 --> 13:45.010 I'm going to turn the emission down a little bit more I'm going to go to 50. 13:46.720 --> 13:51.670 Maybe even less than that actually I am on the right thing yeah I'm on the circle. 13:51.670 --> 13:52.810 Let's try one. 13:54.310 --> 13:55.060 Okay that's great. 13:55.060 --> 13:57.660 That adds something inside the lamp. 13:57.710 --> 13:59.410 No that's far too dim. 13:59.410 --> 14:01.130 Let's try 20. 14:02.190 --> 14:02.430 Okay. 14:02.430 --> 14:04.350 That adds enough detail in the lamp. 14:04.410 --> 14:06.830 Is it causing a lot of speckling outside. 14:06.840 --> 14:11.580 So I do want to be cautious of the amount of noise that's being produced. 14:11.610 --> 14:13.060 No that's absolutely fine. 14:13.080 --> 14:14.870 I'm quite happy with that. 14:14.880 --> 14:21.300 Although I do want the strength of our lamp to come up the actual spotlights itself so let's going about 14:21.370 --> 14:25.170 the spot and looking at this. 14:25.170 --> 14:34.500 We've got a strength of 100 Let's turn up to 250 and see what we get then a much more defined spot. 14:34.500 --> 14:35.870 Perfect. 14:36.060 --> 14:38.900 So I've left that to render out for three thousand samples. 14:38.900 --> 14:39.730 That's a bit higher. 14:39.750 --> 14:42.260 No need for you to go that high. 14:42.360 --> 14:44.600 And I just noticed a couple of things. 14:44.610 --> 14:50.490 First of all I don't want to be quite this harsh so I can change a few settings there. 14:50.820 --> 14:55.850 I did walk away to go grab a glass of water I didn't deliberately let it run for 3000 samples. 14:55.910 --> 14:59.050 So now we go to the spotlight and go to the spot properties. 14:59.100 --> 15:07.600 I'm just going to increase the size of our spots to 60 and that will give it a much larger circle. 15:07.620 --> 15:09.900 So I'm happy with that. 15:10.020 --> 15:10.660 Okay. 15:10.830 --> 15:17.040 Now I'm going to increase the blend ever so slightly as well to make it just a little bit softer round 15:17.040 --> 15:20.040 the edge maybe not quite that high. 15:20.040 --> 15:21.970 Perhaps point five. 15:22.350 --> 15:23.160 Okay. 15:23.220 --> 15:25.470 Now that's done I just need to link both. 15:25.470 --> 15:32.120 The lamp that we've just created this circle here I'm going to call that light bulb. 15:32.340 --> 15:33.680 Okay so that's that. 15:33.690 --> 15:38.670 And the spots now need to find the where is the lampshade joints. 15:38.670 --> 15:41.560 They're both children of that. 15:42.810 --> 15:50.160 I would just check really quickly if we click on the rig go into post mode which we're in I can't see 15:50.160 --> 15:52.180 the rig at the moment so let's turn it on. 15:52.290 --> 15:53.300 Excellent. 15:53.310 --> 15:58.380 We need to grab one of the bones and that is the not the upper arm bone. 15:58.380 --> 16:00.800 The next one down this one here. 16:00.810 --> 16:02.800 Oh have we not. 16:02.850 --> 16:04.140 Upper arms here are a one. 16:04.260 --> 16:09.850 Let's rename that straightaway was respotted that's two lamp shade. 16:12.230 --> 16:12.780 Excellent. 16:12.920 --> 16:13.920 That's selected. 16:14.000 --> 16:15.120 If I move. 16:15.890 --> 16:17.780 Ah lamp abouts. 16:17.900 --> 16:18.470 Excellent. 16:18.470 --> 16:20.360 The spotlight moves as well. 16:20.360 --> 16:22.450 That's exactly what I wanted to do. 16:22.790 --> 16:23.470 Excellent. 16:23.630 --> 16:26.270 So please share how you got on in discussions. 16:26.270 --> 16:31.160 I'd love to see what sort of spotlights you guys came up with whether you follow this exactly or you 16:31.160 --> 16:32.900 experimented a little. 16:32.900 --> 16:36.900 Please share in the discussions and I will see you in the next lecture.