WEBVTT 00:00.830 --> 00:03.620 Welcome to extracting image data. 00:03.890 --> 00:06.070 So can we extract this shadow. 00:06.290 --> 00:10.300 There are a couple ways that come to the top of my mind that we could do. 00:10.400 --> 00:16.250 This is a rather arduous one we could take the background image and map it to an object that is visible 00:16.250 --> 00:16.950 in the render. 00:17.180 --> 00:22.610 But that can cause no end of issues especially if we're animating things can change rather rapidly and 00:22.610 --> 00:29.330 you'd have to remap every frame no good there would be a better way of doing that now because we have 00:29.420 --> 00:32.430 all of the 3D data to make a comparison scene. 00:32.450 --> 00:40.460 We can go about and do that we can create another render layer for comparison without the object and 00:40.460 --> 00:43.220 therefore without the shadow as well. 00:43.250 --> 00:50.090 Now we can create just the shadow on its own however that can cause issues where the shadow appears 00:50.150 --> 00:55.340 on top of our plane rather than underneath it. 00:55.430 --> 01:01.520 And finally we do need to consider the order of these layers and by layers I'm not specifically talking 01:01.520 --> 01:06.830 about the render layers but we are going to have our background image the render layer with everything 01:06.860 --> 01:09.370 on and the render layer for comparison. 01:09.530 --> 01:13.400 So we've got those three layers if we combine them in the wrong way. 01:13.520 --> 01:18.110 Now there's not going to be too many permutations with three of them but if we combine the wrong way 01:18.350 --> 01:22.890 you're not going to get the desired result and we'll play with that and see what we get. 01:23.450 --> 01:27.820 So let's see if we can go extract that shadow and hop on over in a blender. 01:29.240 --> 01:32.630 Right so we have our f 22 on top of the runway here. 01:32.630 --> 01:37.640 And that's looking pretty good apart from the fact it doesn't really have any presence with there being 01:37.670 --> 01:38.810 no shadow. 01:39.080 --> 01:41.630 Now how are we going to go about doing this. 01:41.660 --> 01:47.120 Well first of all let's think very carefully about how we've currently got this set up and what is really 01:47.120 --> 01:48.320 happening. 01:48.350 --> 01:56.180 So we have this image of the plane on the rim with a shadow and it's being masked out by just the plane. 01:56.210 --> 01:58.570 We have a look at that's on the backdrop. 01:58.580 --> 02:04.700 We see that it's just an alpha we anything that's just this plane will show through when we mix them 02:04.700 --> 02:07.360 together and the black would mean anything. 02:07.370 --> 02:09.130 That's not this plane. 02:09.190 --> 02:13.770 It's part of this background image will show an order does matter. 02:13.780 --> 02:17.900 Some going to get rid of the viewer there for the moment and turn off the backdrop if we mix these up 02:17.900 --> 02:22.310 the wrong way you end up offering out the background and leaving the rest of the image. 02:22.340 --> 02:25.470 So it does make a difference the way order these. 02:25.580 --> 02:31.910 Now when you have other mixed nose We also have an issue with the ordering not only of the inputs to 02:31.910 --> 02:40.880 any mix no but also which makes node comes first now because we're literally dropping this plane on 02:40.940 --> 02:41.480 last. 02:41.510 --> 02:43.910 Was saying this is the last thing to go on. 02:43.910 --> 02:44.590 Stamp. 02:44.600 --> 02:45.700 We put it on top. 02:45.800 --> 02:49.930 That's also going to be the last thing we do later on that nothing passing in front of it. 02:50.060 --> 02:52.100 So we're okay to do that. 02:52.130 --> 02:56.220 So let's go ahead and work on the shadow. 02:56.450 --> 02:59.760 So we're going to need a comparison layer. 03:00.010 --> 03:05.630 And in order to do that we're going to have to go over to the render layers tab and sort that out by 03:05.630 --> 03:10.880 the way I've just moved the background image down because this is the last thing to be going on. 03:10.880 --> 03:13.550 I can just move it up and out of the way. 03:13.700 --> 03:17.160 And I'm going to zoom in a little there so we can see what's going on now. 03:17.180 --> 03:21.430 This is also a great thing to do with multi monitors. 03:21.430 --> 03:23.920 You are not going to be able to show you a multi monitor setup. 03:23.930 --> 03:25.750 You won't be able to see it on a normal screen. 03:25.840 --> 03:31.820 It would look crazy but if you do have a multi monitor set up I would advise going window duplicate 03:31.820 --> 03:39.530 window and setting your node editor to a different window and perhaps your this whole area here could 03:39.530 --> 03:43.220 be the picture viewer with a properties panel on the side here. 03:43.670 --> 03:46.250 But we need to create another Rendell air for comparison. 03:46.250 --> 03:51.800 So we've got one render layer and I'm going to call this complete scene because that is what it is it's 03:51.800 --> 03:54.040 not just a render layer it is a complete scene. 03:54.050 --> 03:58.310 I'm going to add a nother render layer which you're going to use for a comparison and I'm going to call 03:58.310 --> 04:02.520 this only ground because that is what I need to compare it with. 04:05.310 --> 04:10.230 Now there are a couple of ways of making this work we could duplicate everything to another layer including 04:10.230 --> 04:14.270 the lamp and completely forget about the plane. 04:14.400 --> 04:20.190 But we don't need to do but what we can do is shift the plane over to another layer like Layer 2. 04:20.190 --> 04:25.190 So with the plane selected I'm going to go to the object properties here and shift it over to layer 04:25.200 --> 04:30.420 to it will disappear from here because in the render Tab we're not including both layers. 04:30.420 --> 04:32.810 I'm going to hold down Shift and select layer. 04:32.820 --> 04:39.930 So so now we can see everything again and we're working on a Only ground just to make sure that is selected. 04:39.930 --> 04:48.500 So we've got only ground here but we want to exclude in this one we want to exclude the plane itself 04:48.510 --> 04:53.790 the aeroplane not the plane on the ground how we want to exclude that so when we render them out now 04:53.910 --> 04:57.680 we go render and render we won't see any difference down here just yet. 04:57.690 --> 05:03.420 But now we can have we if we have a look in this red layer we've got this and the complete scene is 05:03.510 --> 05:04.230 only the ground. 05:04.260 --> 05:06.570 And we got only the ground there perfect. 05:06.570 --> 05:09.180 So we will go back to complete scene. 05:09.180 --> 05:13.290 The other thing that we need to make sure is well do we need to pass through an object index. 05:13.290 --> 05:18.480 I don't think we do so will leave unchecked for the moment if we need to do something with the objects 05:18.480 --> 05:20.930 ground and removing that from the scene. 05:21.030 --> 05:21.830 We can do. 05:21.840 --> 05:23.200 But I think we'll be okay. 05:23.610 --> 05:29.220 So we've got and we're going to have to use this render layer here and the other render layer make a 05:29.220 --> 05:35.760 comparison between them in order to do this I could link this down and drag it down and plug it into 05:35.760 --> 05:36.080 a mix. 05:36.080 --> 05:41.520 No but conceptually I'm going to keep that as a completely separate entity so I'm going to introduce 05:41.850 --> 05:48.200 a new input a a layer and I'm going to duplicate that render layer and then set one of them to complete 05:48.210 --> 05:48.560 scene. 05:48.570 --> 05:50.600 And one of them to only the ground. 05:50.670 --> 05:55.230 Now I'm not sure if this is going to be the appropriate order so that we don't have crossed wires. 05:55.260 --> 05:56.020 Does that matter. 05:56.050 --> 05:56.810 Not really. 05:56.810 --> 06:01.030 I'm going to turn on the back drop so I can see what's going on that's what we were looking at last. 06:01.190 --> 06:07.150 And I'm going to add in a colour mix node and I'm going to plug these two entities in. 06:07.410 --> 06:14.670 Now if we're looking for a difference between these two layers we can do several things to without the 06:14.670 --> 06:19.730 first thing I thought was a subtract and then we would see the difference between one layer and another. 06:19.830 --> 06:25.650 But what would be nice is if this itself created some sort of mask this does create a mask that's kind 06:25.650 --> 06:28.980 of inverted but it also lightens things. 06:28.980 --> 06:31.950 It lightens the shadow quite considerably. 06:31.950 --> 06:33.400 There's also a difference. 06:33.420 --> 06:37.620 So let's click on difference and it looks exactly the same. 06:37.620 --> 06:41.910 That is the definition of subtracts After all it's the difference between two. 06:42.060 --> 06:49.680 After playing for ifit dividing and with these round beat other way gave me a nice shabot and it gave 06:49.680 --> 06:52.990 me a plane that the plane itself doesn't really matter. 06:53.010 --> 06:58.340 The reason why it doesn't matter is because we're going to put a stamp essentially over the top but 06:58.630 --> 07:01.050 in fact because there's a gap underneath the shadow. 07:01.050 --> 07:06.000 My whole argument about not just rendering the shadow out is now null and void because of the position 07:06.000 --> 07:08.070 of the light and everything else. 07:08.070 --> 07:12.830 So in order to make it not meyler Void I'm going to actually place my plane on the ground. 07:12.990 --> 07:15.290 So there is some of the shadow which we can't see. 07:15.300 --> 07:19.070 It's underneath that plane literally underneath. 07:19.440 --> 07:21.810 We've also got these lines going across. 07:21.810 --> 07:27.420 Let's just move this up away so you can focus on the picture we've got a line scooting across here. 07:27.810 --> 07:33.330 That is where that plane i.e. the ground plane exists. 07:33.330 --> 07:37.620 And that may cause us a problem that's why I was thinking earlier about we might need to use an object 07:37.650 --> 07:41.120 eidy just for that plane itself to remove it. 07:41.130 --> 07:45.370 But I don't know if I think we can get away with not having it. 07:45.540 --> 07:50.990 So we've divided these together and we get this image coming out looking good so far. 07:51.060 --> 07:56.900 We now need to put all of this back together now before we actually blend anything else together. 07:56.910 --> 08:02.310 We need to blend this background image into this new mix now. 08:02.310 --> 08:07.680 So were going to come out of here and into here with another mix now so let's add that in so it's ready 08:07.680 --> 08:10.430 to go and I was going to plop them together. 08:10.790 --> 08:11.640 There we go. 08:11.850 --> 08:13.500 And it's not working at the moment. 08:13.530 --> 08:19.750 That's fine we've got all the mixed nodes we need in place but we need to do some re ordering. 08:19.800 --> 08:22.910 No we don't need to do any reordering that's all ready to go. 08:23.020 --> 08:25.950 Of course now it's time for a challenge. 08:25.950 --> 08:32.880 It's time for the final image composite so finish off the notes set up to show the background with the 08:32.880 --> 08:37.260 object placed on it and the shadow of the object. 08:37.260 --> 08:42.150 Consider adding more light if your object is to shadowed. 08:42.150 --> 08:44.110 So you may be like me with the light. 08:44.130 --> 08:50.970 The original lighting source in the scene is low on the horizon as it were and so the front is quite 08:50.970 --> 08:53.380 shadowed and I'm going to add inner light as if it was. 08:53.380 --> 08:57.410 Perhaps it's a flash photography or something along those lines. 08:57.420 --> 09:01.660 Now you may need to create another eidy mask for the ground. 09:01.740 --> 09:03.290 Do give it a different pass. 09:03.300 --> 09:03.480 None. 09:03.750 --> 09:07.270 If you do sometimes it works apsey fine. 09:07.290 --> 09:10.020 Sometimes you will need that extra I.D. mask. 09:11.220 --> 09:14.520 Complete the final composition and share it with us. 09:14.520 --> 09:19.770 I love seeing you guys work and everybody else like seeing your work too so please make sure you share 09:19.770 --> 09:21.870 your work over on the forum. 09:21.900 --> 09:24.350 Pause a video now and give that a go. 09:26.560 --> 09:28.220 Okay guys welcome back. 09:28.270 --> 09:31.600 Let's go complete our final image composition. 09:31.900 --> 09:36.430 So one thing at a time here let's compartmentalize what we've got going on. 09:36.490 --> 09:39.830 So we've got this this and this all acting together. 09:39.850 --> 09:44.160 I'm going to put them inside a frame and they're creating our shadow. 09:45.170 --> 09:47.830 Then we've got the background image which is all by itself. 09:47.840 --> 09:52.040 And then we're mixing the background image and our newly formed shadow. 09:52.040 --> 09:53.210 And let's see what we get. 09:53.210 --> 09:58.040 I'm going to remove that viewer and remove the backdrop so I can see my nodes more clearly. 09:58.040 --> 10:02.730 So obviously mixing them together is not helping in this respect. 10:02.870 --> 10:09.280 And if I move them backwards and forwards Oh are you expected that I would not cross plug in either. 10:09.290 --> 10:09.730 Silly me. 10:09.740 --> 10:11.890 Let's plug it in so we can see what's going on. 10:11.890 --> 10:16.540 So we mix between these will just get a blend between them and that's no good. 10:16.550 --> 10:17.350 That's not what we want. 10:17.350 --> 10:21.050 We want to see all of this on top of this. 10:21.140 --> 10:24.190 Now we have a look at this particular image that's coming out of here. 10:24.190 --> 10:25.580 Just move the factor along. 10:25.700 --> 10:31.370 We've got a lot of white if you remember earlier I was talking about if you've got white that's a value 10:31.370 --> 10:32.390 of one. 10:32.840 --> 10:40.010 So if you go ahead and multiply by one you'll get the same background image coming out. 10:40.010 --> 10:42.280 So let's go ahead and do that now. 10:42.520 --> 10:44.920 Ah I'm going to test it in a moment. 10:44.930 --> 10:48.630 But I also think of any values of coming out of here greater than one. 10:48.770 --> 10:53.990 So this pixel here that you can't really see any of these white pixels if they're actually greater than 10:53.990 --> 10:57.140 one in their value you'd be dividing and making the image darker. 10:57.140 --> 10:58.460 Let's see if that makes any difference. 10:58.460 --> 11:00.480 So we need a multiply. 11:01.240 --> 11:02.450 So were multiplied here. 11:02.470 --> 11:06.570 And again it doesn't matter if we can see through our plane at the moment because we have a stamp our 11:06.590 --> 11:07.810 plane back on. 11:08.250 --> 11:11.200 Okay so a multiply next clamp this divide. 11:11.310 --> 11:16.010 KS not making any difference in this particular instance but do bear in mind whenever you are doing 11:16.010 --> 11:22.370 a division if a value coming through turns out greater than one it would cause you a problem. 11:22.520 --> 11:24.170 It's not in this case so we're fine. 11:24.170 --> 11:26.620 I'm going to leave it clamped just force. 11:26.630 --> 11:31.530 Just so it's it's right so to speak even though it doesn't seem to be making any difference. 11:31.820 --> 11:36.970 Okay now we need to stamp this on top so let's go ahead and link these two up and plug it in. 11:37.760 --> 11:38.780 Is that done. 11:38.780 --> 11:39.730 I think it might be. 11:39.770 --> 11:40.800 Let's swap these around. 11:40.850 --> 11:42.180 Yeah it's definitely done. 11:42.320 --> 11:44.290 And let's just make sure we can't see through that wing. 11:44.300 --> 11:45.030 We can't. 11:45.080 --> 11:46.330 Okay. 11:46.580 --> 11:49.920 But it's still a bit dark on the front here so what can we do. 11:49.940 --> 11:56.210 I'm going to click on my plane itself and literally add a lamp into the scene and because we're rendering 11:56.210 --> 11:57.690 both scenes it doesn't matter. 11:57.710 --> 12:03.640 Well it doesn't need to be on the same layer as our plane ideally otherwise it won't be rendered. 12:03.680 --> 12:06.930 There we go lamp add in a lamp. 12:07.040 --> 12:14.210 Just the point lamp and well that's remenda and see what that comes out as that's probably a little 12:14.210 --> 12:16.380 too close to our plane. 12:16.430 --> 12:18.730 So I'm going to scoot round to the top view. 12:18.770 --> 12:19.920 There's our plane. 12:20.830 --> 12:24.430 And with this again multi monitors here would help massively. 12:24.430 --> 12:26.230 I'm just going to move the lamp. 12:26.260 --> 12:28.840 So it's a way from the plane ever so slightly. 12:28.840 --> 12:29.420 And there we go. 12:29.440 --> 12:31.540 Also render is now kicked back in. 12:31.810 --> 12:38.350 And I'm going to turn up the intensity just a little so we're on the lamp we've got it selected it's 12:38.350 --> 12:42.450 in emissions strength 100 less stress strength four thousand. 12:44.070 --> 12:45.780 And that has not updated anything. 12:45.780 --> 12:49.150 So again I'm going to move the lamp by nothing. 12:50.290 --> 12:51.040 And there we go. 12:51.040 --> 12:53.580 That's better it's highlighted the front of our plane. 12:53.710 --> 12:57.360 And of course you can move into different positions to give it a different lighting effects. 12:57.460 --> 13:01.690 I'm going to move it slightly over to the side so we've got more lights coming in from the side just 13:01.690 --> 13:03.220 highlighting those edges. 13:03.220 --> 13:05.290 And then we've got a nice shadow around the edge there. 13:05.290 --> 13:06.410 I'm liking that. 13:06.610 --> 13:09.700 Let's do something funky inside our plane. 13:10.020 --> 13:14.560 You don't have to do anything like this of course I'm going to have a look there select the plane and 13:14.560 --> 13:17.870 use PAD zero and go into perspective mode. 13:18.020 --> 13:22.420 I'm just going to select inside the air intake and add another lamp. 13:22.420 --> 13:24.230 This is just for fun. 13:24.280 --> 13:26.090 I'm going to set that lamp to have. 13:26.110 --> 13:28.030 I don't know a blue colour. 13:28.100 --> 13:28.720 There's that. 13:28.720 --> 13:31.490 That's right render it does that work call. 13:31.510 --> 13:35.200 It doesn't need to have a strength of that maybe a little less. 13:35.200 --> 13:36.380 That's re render. 13:37.640 --> 13:40.120 Let's go a little less once again. 13:41.120 --> 13:44.690 Shame that doesn't auto render at this point there is a little bit annoying. 13:44.690 --> 13:46.550 Let's just try strength for five. 13:46.550 --> 13:48.380 There we go a nice blue glow coming from it. 13:48.380 --> 13:49.470 Realistic no. 13:49.470 --> 13:49.920 Cool. 13:49.940 --> 13:50.600 Yeah. 13:50.720 --> 13:54.000 Why not let's do orange that see how orange comes out. 13:54.140 --> 13:56.100 Yeah that's probably a little metal or better. 13:56.120 --> 13:59.850 Okay this is really noisy at the moment and we are. 13:59.900 --> 14:06.140 We need to be careful of is we don't override our blooming shadows that we had here before. 14:06.320 --> 14:09.080 Let's go ahead now and turn up the render details. 14:09.110 --> 14:13.280 I'm not going to bother with it being super high resolution in fact I'm going to make it lower. 14:13.430 --> 14:18.540 I am going to turn up my samples now and turn them up to 50 and re render. 14:19.010 --> 14:23.620 So I've got a shudder there and combined that's very subtle but does have a sort of shudder. 14:23.630 --> 14:27.530 I don't think the shadow itself is strong enough. 14:27.530 --> 14:29.350 In this case I really don't. 14:29.430 --> 14:35.830 So a couple of options we can do there because I dont want to lose the highlighting on my plane. 14:35.900 --> 14:41.390 The first thing I can do is try moving that way perhaps so the light is highlighting the plane isn't 14:41.390 --> 14:42.550 so close. 14:42.620 --> 14:44.200 Maybe it's too close to the ground. 14:44.210 --> 14:47.800 Where is our spot like let's lift that up a little. 14:49.620 --> 14:53.300 Okay that's that's still not doing exactly what I wanted. 14:53.310 --> 14:58.560 Let's go to our sunlamp and increase its intensity because it's at five at the moment it's just try 14:58.590 --> 15:02.460 50 and once again I'm going to move this by zero. 15:02.450 --> 15:04.330 I could have hit 12 as well. 15:05.740 --> 15:08.320 Interesting we've now got a highlight round our plane. 15:08.320 --> 15:10.200 That's not very nice. 15:10.200 --> 15:12.370 So I'm going to turn that back down to 5. 15:12.370 --> 15:13.550 I don't like that at all. 15:13.570 --> 15:14.790 And I'm going to re render. 15:14.950 --> 15:19.100 So there's some fun to be had here we have got a shadow over the back here. 15:19.120 --> 15:25.210 I don't think the shadow I need to move this around I believe or make it weaker and closer. 15:25.360 --> 15:28.320 So we'll go a hundred and move around again. 15:28.330 --> 15:30.720 This is now playing with the scene. 15:30.730 --> 15:31.340 There we go. 15:31.510 --> 15:32.540 That's a bit better. 15:32.560 --> 15:33.540 I'm happy with that. 15:33.550 --> 15:37.700 And it's time to render that out in full and see what it looks like. 15:37.720 --> 15:43.850 In fact I'm going to also go ahead and add some materials to this plane so it doesn't look so dull. 15:44.140 --> 15:46.610 And I'll see you guys back in a moment with the full render. 15:47.840 --> 15:55.820 Okay so as I was playing about here with V F 22 I just added a glass cockpit or was about so and I was 15:55.880 --> 16:01.490 just literally playing about how I added a transparent which round the top here and I render that out 16:01.550 --> 16:03.690 and all of a sudden it went like this. 16:03.710 --> 16:07.500 So it does look like we need to exclude the. 16:07.520 --> 16:09.330 Ground plane in our renders. 16:09.350 --> 16:10.690 So we need to go ahead. 16:11.010 --> 16:12.220 That's hop out here. 16:12.290 --> 16:18.260 So it's our ground plane and give it an index pass different to our plane and go in and add it into 16:18.260 --> 16:19.610 the appropriate place. 16:19.640 --> 16:23.160 So it's going to be coming out of this in jet in Im there. 16:23.180 --> 16:25.870 But menteith back in index Oh beep. 16:25.950 --> 16:27.900 And I'm going to add that in. 16:29.580 --> 16:35.560 Convert her I.D. mask of a pop that in there and there we go but soon so going to take this out. 16:35.580 --> 16:39.190 And now we've not got all of this set up quite yet. 16:39.210 --> 16:41.390 We do need to render. 16:41.700 --> 16:48.280 In fact we need to make sure only the ground has the object index because thats the one we once x then. 16:48.330 --> 16:49.470 Now we just need a rerun. 16:49.500 --> 16:51.040 Before we do anything else. 16:51.150 --> 16:54.840 So weve got an owl fillet here lets just check and see what that looks like. 16:54.840 --> 16:55.520 Excellent. 16:55.530 --> 16:56.600 So we need to plug that in. 16:56.600 --> 16:58.970 Where it goes wonky does it go wonky here. 16:59.040 --> 17:01.080 Maybe does a go wonky here. 17:01.080 --> 17:02.320 I think it does. 17:02.370 --> 17:07.610 So we plug that into the factor and then swap these round all this. 17:07.620 --> 17:09.600 This is an odd one here. 17:09.900 --> 17:14.060 Now if not get the indexed pass set to 2. 17:14.260 --> 17:18.410 K. And how that is looking much better now. 17:18.420 --> 17:19.100 Excellent. 17:19.420 --> 17:23.380 I hate it when I forget to flick four index mask to the right value. 17:24.810 --> 17:25.280 Excellent. 17:25.280 --> 17:25.770 Thats me. 17:25.770 --> 17:26.060 Done. 17:26.070 --> 17:29.650 Im going to render this out now as my final scenes are going to turn up. 17:29.760 --> 17:35.040 I'm only gonna render it 10 ATP and I'm also going to turn up the render the render samples here to 17:35.040 --> 17:39.510 200 and then just hit render and wait for a bit. 17:39.510 --> 17:41.790 It will take a while to render out. 17:42.500 --> 17:44.060 And there we go. 17:44.090 --> 17:44.600 Excellent. 17:44.600 --> 17:48.400 This has turned out much better than I thought it was going to do from Brasilia. 17:48.410 --> 17:49.270 When that happens. 17:49.460 --> 17:50.540 How did ewell's come out. 17:50.540 --> 17:54.860 Did you use the same scene and plane as me or did you do something else. 17:54.860 --> 17:59.780 I'd love to see your work and so would everybody else so please make sure you share your work over on 17:59.780 --> 18:03.540 the forum and I will see you guys in the next lecture.