WEBVTT 00:00.270 --> 00:02.330 Welcome to realistic lighting. 00:02.520 --> 00:09.360 All fake it in this video you will see that there is a fine balance between choosing realistic lighting 00:09.810 --> 00:17.430 and faking it and the time required is often a major factor in working out the path you wish to take. 00:17.430 --> 00:23.050 So all one hand we have realistic lighting just getting everything hyper realistic now. 00:23.190 --> 00:31.050 The issue with that is it can take an incredible amount of time to render and sometimes you get a rubbish 00:31.050 --> 00:32.890 result at the very end. 00:32.940 --> 00:36.420 And of course because it takes a very long time to render. 00:36.510 --> 00:39.070 You may not notice there's a problem with it. 00:39.090 --> 00:40.830 He spent a very long time doing it. 00:40.980 --> 00:47.470 But there are other ways around this issue where we can fake the look we're going for and we're going 00:47.470 --> 00:51.370 to go explore that now and hop on over in a blender. 00:52.410 --> 00:59.190 So I've opened up a brand new blender file and the first thing that we're going to do is literally just 00:59.250 --> 01:04.550 make a a just a quick room out of this cube so got a cube here. 01:04.620 --> 01:06.620 I'm going to go to edit mode. 01:06.660 --> 01:09.130 Subdivide it a couple of times. 01:12.470 --> 01:13.400 Going to edit mode. 01:13.400 --> 01:14.660 I'm going to subdivide it. 01:14.660 --> 01:21.050 Going to bring up the specials menu with W and it go to subdivide and then adjust the number of cuts 01:21.860 --> 01:22.970 in there. 01:22.970 --> 01:24.050 That's about right. 01:24.230 --> 01:31.310 And then I'm going to face select select these six here so we've got some light coming in but I'm not 01:31.310 --> 01:36.770 going to just delete them I thought I was going to what I'm going to do is actually separate them into 01:36.770 --> 01:42.540 a separate object and we can use that to demonstrate what we're trying to do. 01:42.650 --> 01:48.870 Now in this case I'm going to have to move my camera into my box so I'm going to do that now. 01:48.950 --> 01:54.240 Grab it's now going to have to move it not in the z direction just push it in there. 01:54.260 --> 01:55.780 Let's see how that looks. 01:56.000 --> 01:57.140 That's absolutely fine. 01:57.170 --> 02:02.330 I'm going to go for a bit double wide angle similar Go see the camera properties and go to the focal 02:02.330 --> 02:06.750 length and make it twenty four Yeah that should do absolutely fine. 02:07.010 --> 02:12.590 So at the moment and we've not got any lights coming in our scene we've got a lamp outside I'm going 02:12.590 --> 02:14.890 to change that to a sunlamp. 02:16.160 --> 02:21.050 And turn the strength flaps on in a click use nodes at certain strength up to five. 02:21.050 --> 02:25.700 And if we switch over to a rendered married it's going to be black because we are inside that cube. 02:25.700 --> 02:32.810 If we were to go in hide the Q One which I'm going to name now windows so I don't get too confused with 02:32.820 --> 02:34.050 anything. 02:34.340 --> 02:35.980 And make that a bit bigger there. 02:35.980 --> 02:36.450 There we go. 02:36.450 --> 02:41.240 So now we render it we've got like coming into the room I'm not going to bother setting up a light portal 02:41.330 --> 02:45.220 at the moment we shoot obviously make it a bit less noisy. 02:45.590 --> 02:48.800 So we've got the light coming into the room Now that's absolutely fine. 02:48.800 --> 02:57.220 Now if we were going to have glass in the way we would have this window would actually make it a material 02:57.430 --> 02:57.960 change. 02:57.980 --> 03:03.650 So I'm going to see unique material first of all and change that to glass otherwise I've been modifying 03:03.650 --> 03:06.930 the original material there which is something I wouldn't want to do. 03:07.130 --> 03:10.640 I'm going to use notes here and change this to glass. 03:10.650 --> 03:17.000 Now when we go ahead and go around there and scan to render in the viewport we see that it's taking 03:17.060 --> 03:21.760 absolute ages to actually put any light into the room. 03:21.800 --> 03:26.540 It will eventually get there we're on three out of 10 cycles but you can probably guess we're going 03:26.540 --> 03:29.750 to need a lot and lots of samples to get here. 03:29.750 --> 03:35.850 Now this is all in preparation for a stained glass window in a few moments that Im going to be making. 03:35.870 --> 03:43.320 However you can see actually going along the lines of having a realistic room with them in the windows. 03:43.340 --> 03:47.440 It may actually cause you more problems than you think its going to happen. 03:47.460 --> 03:51.190 You want it realistic but at the same time you dont want to wait in the e.on. 03:51.200 --> 03:54.830 So after 10 samples this is what weve got not very good. 03:55.010 --> 04:01.470 However what we can do and this applies to textures is well if we put a texture on to that plane it 04:01.490 --> 04:05.560 all it would be doing is emitting the colour of that plane. 04:05.590 --> 04:08.480 Thats all a basic texture would be doing. 04:08.480 --> 04:12.520 We can change the surface to a emission. 04:13.690 --> 04:17.250 And now that is lighting up the room. 04:17.250 --> 04:24.610 Now depending on what youre going for that could be all you need in order to get the right view. 04:24.810 --> 04:28.630 So we're in this render this out now see how it looks. 04:28.680 --> 04:30.560 Its going to take a while to go through. 04:30.690 --> 04:36.150 And of course this is just a basic room so that is absolutely fine in terms of filling the room up with 04:36.150 --> 04:36.870 lights. 04:36.870 --> 04:42.900 I'm not sure how many samples of gone this render Lets go have a look at 50 in total sense whizzing 04:42.900 --> 04:44.900 around there and thats absolutely fine. 04:44.900 --> 04:53.580 Now of course if I change the material colour and had its red then it would be ziv of the room or the 04:53.580 --> 04:55.680 glass was tinted red. 04:55.680 --> 05:01.680 Now the downside of doing it this way is you cant see through the window which means if theres something 05:01.680 --> 05:07.320 you want to see outside through that window this wont be the best way of doing it you may be able to 05:07.320 --> 05:15.090 find a mix of shaders that sorts that out perhaps putting in a a transparent shader as well as something 05:15.090 --> 05:21.130 else to try and a minute or mimic the see through ability or the transparency of glass. 05:21.150 --> 05:23.930 I was about to make up a word there dangerous thing to do. 05:24.240 --> 05:26.210 So now we've had this preparation. 05:26.280 --> 05:28.450 I've got a small challenge for you. 05:29.440 --> 05:36.730 I would like you to go ahead and create a missive surface so I'm going to be using an image of a stained 05:36.730 --> 05:43.340 glass window and using it's a fake light coming through into my church that I'm making. 05:43.450 --> 05:49.900 Now in your scene perhaps you have a coloured lamp or a TV screen computer screen or a laptop screen 05:49.900 --> 05:50.810 in your scene. 05:50.830 --> 05:56.200 There are lots of different options that you can go for create in the missive surface and see how he 05:56.200 --> 05:59.980 gets on pause a video now and give that a go. 06:02.330 --> 06:03.000 Okay guys. 06:03.020 --> 06:04.100 Welcome back. 06:04.100 --> 06:07.900 Let's go ahead and add in a missive surface over in blender. 06:09.690 --> 06:15.210 Okay so we're back over in blender here and I'm going to go ahead and open up my Gothic church scene 06:15.600 --> 06:20.630 and I'm going to import an images as a plane. 06:20.640 --> 06:22.790 That's how I'm going to bring my texture in. 06:22.950 --> 06:25.220 Now I want to make sure it's roughly in the right place. 06:25.220 --> 06:27.690 I'm going to pop it on the back window here. 06:28.080 --> 06:31.860 So I'm just going to click to but the 3D cursor roughly in the right place. 06:31.860 --> 06:34.280 I can move it to my heart's content in a moment. 06:34.380 --> 06:40.430 I'm going to go and add a mesh images planes or lots of choices here. 06:40.620 --> 06:44.030 Or I can see this stained glass window. 06:45.460 --> 06:48.340 Case I'm going to go in to. 06:48.460 --> 06:50.630 Is it textured mode I want here. 06:50.700 --> 06:53.160 There we go I can see what's going on. 06:53.170 --> 06:56.700 I'm going to rotate round on the y axis. 06:56.700 --> 06:57.830 By the looks of it. 06:58.150 --> 06:59.070 No no no no. 06:59.110 --> 07:00.510 X axis by 90 degrees. 07:00.520 --> 07:01.400 I think so. 07:01.420 --> 07:03.440 Let's move that up. 07:05.560 --> 07:07.770 And make that a bit bigger. 07:08.680 --> 07:12.010 I'm not seeing anything in the moment and just switch over into rendered mode. 07:12.230 --> 07:12.450 OK. 07:12.460 --> 07:17.080 So that gives me an idea of what's going on there and I'm literally just going to stretch this image 07:17.170 --> 07:18.670 up for the moment. 07:18.850 --> 07:22.170 So let's scale it on the z axis. 07:23.320 --> 07:24.160 That's looking good. 07:24.160 --> 07:29.110 Now move it only on the z axis until it fills up the area. 07:29.110 --> 07:32.930 I want it to go it's looking pretty good. 07:33.060 --> 07:37.340 I might actually be able to scale that back down again but I'll leave it like that for the moment. 07:37.360 --> 07:43.330 Now I know there's a few issues around the top here with you in the church from outside of the building 07:43.330 --> 07:48.140 from outside but that's not a problem because my camera view is from the inside. 07:48.190 --> 07:52.680 So let's have a look at what's going here and I can see that it's actually a little bit too high. 07:52.690 --> 07:56.440 So that's crowd that move that back down ever so slightly. 07:56.760 --> 07:57.270 Okay. 07:57.310 --> 07:59.090 Now I'm going to. 07:59.090 --> 08:00.120 It's already. 08:00.220 --> 08:02.050 It's already brought in a lot of the properties. 08:02.050 --> 08:06.740 We've got an image texture here but it's currently set up as a diffuse b s. 08:06.880 --> 08:13.990 So if you shade up I'm going to go ahead now and switch that to a mission if I can see it. 08:13.990 --> 08:14.920 There it is. 08:14.920 --> 08:19.660 And there we go I can already see that that's already pumping out light into our scene. 08:19.660 --> 08:24.540 Now we can play with the strange some going to go to five and perhaps that's a little bit too bright 08:24.550 --> 08:26.450 so drop it back down to four. 08:26.540 --> 08:28.260 And just getting a feel of it here. 08:28.390 --> 08:30.060 And of course the best thing to do. 08:30.810 --> 08:36.390 Is to probably just click render and see how it's looking so we will go ahead and render the image. 08:36.390 --> 08:41.150 Now that might take a while to do I'm just going to check my settings before I go with mine. 08:41.160 --> 08:41.690 There we go. 08:41.790 --> 08:48.870 I don't need to run it at a full 10 ATP or any stupidly high like that's just going to run a very very 08:48.870 --> 08:53.860 low rez version because it's just a spot check how things are looking. 08:53.940 --> 08:55.950 Is lights coming into the scene. 08:55.980 --> 09:01.140 I mean that's looking pretty good so far I'm liking what I'm seeing. 09:01.280 --> 09:03.100 Now of course I can adjust this. 09:03.120 --> 09:07.790 It doesn't look like it's actually filling up the entire window like I expected to. 09:07.790 --> 09:10.710 But again those are all adjustments that I can make. 09:10.710 --> 09:15.190 But that is definitely letting light in and looking much better than it looked before. 09:15.240 --> 09:20.310 It does look like I need to adjust these or indeed get an image that matches my window or make my window 09:20.310 --> 09:22.630 match the image a bit better. 09:22.680 --> 09:26.420 Lots of options there but that is coming along pretty well. 09:26.430 --> 09:32.370 How did you guys get on what did you add into your scene as in a missive surface please post in the 09:32.370 --> 09:33.190 discussions. 09:33.210 --> 09:36.800 I'd love to see them and I will see you guys in the next lecture.