WEBVTT 00:01.270 --> 00:06.170 Welcome to rendering across multiple blenders in this video. 00:06.280 --> 00:10.180 You use multiple computers to render an animation. 00:10.180 --> 00:18.640 Learn how to use multiple instances a blender to utilize the s.p. you and GP you on your computer and 00:18.640 --> 00:22.990 finally decide on how many samples for the final animation. 00:23.470 --> 00:27.270 So let's help stray Tom over into Blender's. 00:27.910 --> 00:33.730 So first of all let's decide on how many samples are final render is going to be. 00:33.780 --> 00:37.900 So looking at our scene in front of us here that is just with one sample. 00:37.910 --> 00:39.730 And that is quite grainy. 00:39.870 --> 00:42.390 That would be unacceptable for a final render. 00:42.460 --> 00:46.780 So we need to simply up the samples count and see what we get. 00:46.840 --> 00:53.230 Now in the 3D view itself if we can hop around to the camera position at this point in time we'll see 00:53.260 --> 00:56.430 roughly what the camera sees as it pans around. 00:56.440 --> 01:02.280 So if I go to that end state and go to camera that's the scene that we can see. 01:02.500 --> 01:05.520 And I'm going to set my render border kind of like that. 01:05.530 --> 01:09.950 So I'm going to hold down Joel and B and just go around our lamp there. 01:09.960 --> 01:17.710 I don't want the whole scene being rendered just that area there I want a switch on rended view after 01:17.710 --> 01:22.890 I've gone down here and changed the preview of had it set to 100 and change it down to one. 01:23.200 --> 01:25.090 And I'm going to go to a rendered. 01:25.090 --> 01:27.120 So this is roughly what it looks like at the moment. 01:27.130 --> 01:33.010 And you can simply keep on increasing the preview samples here as long as you don't move the viewport 01:33.070 --> 01:35.080 or recycle your windows. 01:35.080 --> 01:40.030 It will just keep adding the samples to it and we can see at the top here of of the viewport. 01:40.070 --> 01:41.600 It's a sample four of four. 01:41.650 --> 01:48.670 So you can get a feeling if I go in set that at 50 let's say it will then render out 250 samples and 01:48.670 --> 01:54.580 we'll get a good impression of how that final render will look ultimately the more samples you have 01:55.030 --> 01:59.090 the more and more detail you will end up with at the end. 01:59.090 --> 02:04.230 Now that has to be weighed off against the time it takes to do the render. 02:04.420 --> 02:09.430 If this was a presentation render then obviously you'd want to spend as much time as you physically 02:09.430 --> 02:14.140 got to doing it or a final render for an animated film or something like that. 02:14.230 --> 02:20.740 But in this case we've got to make a decision as to when the sample rate is high enough. 02:20.830 --> 02:27.150 Now whenever I've done things in the past I tend to set it greater than 100 to be quite honest maybe 02:27.160 --> 02:28.690 in two or three hundred. 02:28.780 --> 02:33.390 And if you were really working on something that's got a lot of detail in the scene perhaps even glass 02:33.390 --> 02:34.830 of something on those lines. 02:34.900 --> 02:36.880 You'll want it even higher than that. 02:36.880 --> 02:44.080 Just get the clarity out so it does of course depend on your scene itself and how detailed you want 02:44.080 --> 02:46.140 to be saw at 50 at the moment. 02:46.180 --> 02:53.860 And if I increase that to all I don't now let's go up to 300 and just let that render out in the background. 02:54.190 --> 03:00.600 Now if you want to speed things up when you do the rended animation you can do something quite clever. 03:00.640 --> 03:06.890 Now it does depend on the speed of your computer how you parcel this out. 03:07.060 --> 03:13.750 So I know that my GP is slightly slower than my CPA you on this particular computer and I can utilize 03:13.750 --> 03:17.030 both of those so we'll cover that one first. 03:17.140 --> 03:19.200 I am loathe to interrupt this. 03:19.210 --> 03:24.840 Some going to let that render out to 300 and see what it looks like and join you again in a few moments. 03:29.310 --> 03:31.290 Okay so looking at 300 samples. 03:31.290 --> 03:32.400 That's pretty neat. 03:32.400 --> 03:37.490 There's very little noise in the scene that I can see there's a little bit around the lamp base but 03:37.500 --> 03:40.890 I think they'll be absolutely fine for me rendering at that. 03:40.900 --> 03:44.810 Without of course waiting weeks and weeks and weeks for the render itself. 03:45.090 --> 03:49.410 Okay so with multiple instances of blender on one computer. 03:49.410 --> 03:55.650 Now if you've got a dedicated graphics card in the computer and it works with blender then you will 03:55.650 --> 03:59.750 want to do a test render just with the GP you and will do that now. 03:59.840 --> 04:04.590 So you've got this scene here with 300 samples of calls going to resample in a moment along the switch 04:04.590 --> 04:11.130 across to GP you compute and see how that comes out and we can see it renders it pretty much exactly 04:11.130 --> 04:13.940 the same as our s.p. used. 04:13.950 --> 04:15.860 So I'm happy with that. 04:15.930 --> 04:21.960 So I'm going to switch that back to see you for the moment and I'm going to get really cramped on the 04:21.960 --> 04:23.710 screen please bear with me. 04:23.730 --> 04:25.600 I'm going to save this file. 04:25.770 --> 04:31.560 I've been working on and I'm going to go half screen with my work. 04:31.560 --> 04:37.620 I'm going to open up another instance of blender and I'm going to shove that over the other side of 04:37.620 --> 04:43.200 the screen and it's very very tight on here so let's just see if we can make it a little bit easier 04:43.200 --> 04:44.780 to see. 04:44.970 --> 04:47.300 And there we go save that file there. 04:47.490 --> 04:53.320 And I'm just going to turn off the rendering at the moment so it doesn't start rendering automatically. 04:53.330 --> 04:54.270 We save that. 04:54.390 --> 04:56.870 So over here I am going to open up. 04:56.880 --> 04:59.750 This is a separate instance of Blender. 05:00.060 --> 05:05.400 So now we've got the same one across multiple instances on blender. 05:05.400 --> 05:06.720 Now the secret here. 05:07.060 --> 05:12.370 Well that's not really secret but don't tell me what the secret here is to literally. 05:12.390 --> 05:13.620 On this one computer. 05:13.620 --> 05:21.100 I would set the start and the end does perhaps not 80 knowing that the s.p. is faster. 05:21.690 --> 05:31.410 And on this side I would start 81 and end 120 and therefore both sides are going to be doing their own 05:31.410 --> 05:38.070 thing are going to set the device here to GP you knowing that this size is going to manage it with the 05:38.070 --> 05:46.500 s.p. you so we can have a look at that across there see P in GP you and then finally I can literally 05:46.500 --> 05:47.960 just go to render. 05:48.270 --> 05:51.890 Well let's set it up here first before we do that. 05:51.960 --> 05:58.240 Before we do any renders we need to change this to 300 as we said before. 05:58.740 --> 06:02.410 And the same on this side of the render samples of the site. 06:02.970 --> 06:03.740 Okay. 06:03.810 --> 06:07.860 If you would set that before opening up the same file the settings would apply. 06:07.860 --> 06:15.360 So just a follow good practice I will quit the one that I've been mucking around with save this file 06:15.390 --> 06:20.980 over here open up a nother instance of blender. 06:22.670 --> 06:26.450 And I'm going to open up our animated lamp file again. 06:26.600 --> 06:32.180 And that makes sure that any of the settings we change on our actual main lamp are reflected across 06:32.180 --> 06:32.780 here. 06:33.080 --> 06:40.100 And then finally if I just scroll down your samples of the same face should be exactly the same start 06:40.100 --> 06:44.680 an end of the start and end on this one is not 80. 06:44.690 --> 06:51.500 And then finally across here we've got these start and end at nought to 80 so we'll want this one eighty 06:51.500 --> 06:55.630 one to 120 was our last bit. 06:55.820 --> 06:56.240 Excellent. 06:56.240 --> 06:57.610 So that's now ready to render. 06:57.620 --> 06:59.850 And if we simply went. 07:00.240 --> 07:01.460 Well no it's not. 07:01.460 --> 07:03.890 Before we do that it's very tempting to just click render. 07:04.040 --> 07:07.060 Let's make sure the output folder is the same. 07:07.120 --> 07:09.220 But up at the top here. 07:09.590 --> 07:16.280 So I'm going to just go up here and I'm going to create another Directorate and go lamp three hundred 07:16.370 --> 07:17.390 final. 07:17.390 --> 07:18.690 That's absolutely fine. 07:19.480 --> 07:24.790 I want to select that and accept and I'm just going to start the render going over here so render animation 07:24.790 --> 07:29.730 so that once started going now there's a couple of things on the GP that we need to change. 07:29.730 --> 07:35.040 I'm going to change my tiles size here so it's slightly larger. 07:35.040 --> 07:40.460 I can't remember which one was good but I think 2 5 6 2 5 6 would be absolutely fine. 07:41.410 --> 07:45.380 I make sure we are using the GP so that's set there. 07:45.440 --> 07:50.020 And then finally we just need to make sure it's directed to the right folder. 07:50.030 --> 07:58.610 So in downloads lamp 300 final and accepts and then when I hit render and run around animation on here 07:59.060 --> 08:08.600 this one will be dumping from s.a.t. or sorry frame 81 to 120 and off it goes. 08:08.600 --> 08:12.580 Now you can use the same principle across multiple computers. 08:12.650 --> 08:19.970 So if you were sharing files via a drop box you could literally save the files in the drop box and when 08:19.970 --> 08:26.210 all the computers have finished rendering There you go you've got your b.n. GS and this case ready to 08:26.360 --> 08:28.920 go ready to make into a movie. 08:28.970 --> 08:34.340 So if we were using multiple computers again I would divide them all by the speed so you'd have to work 08:34.340 --> 08:37.190 out the relative speed of each computer. 08:37.280 --> 08:43.280 And so in this case we can see that it's going to take about a minute to do this rendering here and 08:43.280 --> 08:45.430 it's going to take slightly over a minute to hear. 08:45.560 --> 08:52.070 So I know to split it up in this sort of 60 40 principle but I've got another computer in the office 08:52.070 --> 08:58.820 just over the way if I go and get that I know that is slightly faster than our than the computer I'm 08:58.850 --> 09:03.180 currently working on when it comes to rendering but it's only got s.p. 09:03.320 --> 09:11.310 So if I was utilizing that one as well I would set it to 30 30 no not 30 30 40. 09:11.350 --> 09:19.550 It would probably be more like 50 s.p. or in this machine 50 on the other machine frames and then 20 09:19.550 --> 09:20.820 frames on the GP. 09:20.840 --> 09:23.930 And it probably finished off the GP quicker than anything else. 09:24.050 --> 09:25.100 But that's absolutely fine. 09:25.100 --> 09:27.630 I don't mind if that's what happens. 09:27.800 --> 09:33.520 So we just leave it now to render out and we end up with our polished scene at the end. 09:34.860 --> 09:36.640 Okay so one quick final. 09:36.640 --> 09:41.530 Learning that I almost overlooked Now the screen slightly different. 09:41.560 --> 09:47.800 You remember earlier when we were looking through the camera and we set up a render border in the camera 09:47.800 --> 09:48.910 itself. 09:49.130 --> 09:55.630 Now you will notice that if we had actually gone through and rendered the image that's no longer this 09:55.630 --> 10:03.040 16 by 9 aspect ratio that we use to happing especially since that itself if we scroll up here is the 10:03.040 --> 10:04.520 dimension of the render. 10:04.750 --> 10:09.140 Now when you have it set like facts that render border. 10:09.160 --> 10:13.730 It affects the final render to certain this. 10:13.780 --> 10:15.100 Cancel that now. 10:15.280 --> 10:21.940 Let's go back and see this red render border that we applied whilst in the camera review will actually 10:21.940 --> 10:25.270 change what comes out on the final render. 10:25.390 --> 10:30.850 If we set one up anywhere else so if we rotate round here insert another one up that won't matter. 10:30.850 --> 10:34.670 That won't change it but the camera one has a separate render border. 10:34.750 --> 10:40.660 So before you go ahead and render out to your spend hours rendering and find out you've cut off the 10:40.660 --> 10:41.740 edges of your scene. 10:41.890 --> 10:44.620 I do suggest you clear that border before doing so. 10:44.620 --> 10:50.250 I just spotted it watching them render I didn't see it when the screens were condensed like that so 10:50.260 --> 10:57.130 control Oulton B will remove that from our scene and I just quickly do a quick render test and we can 10:57.130 --> 11:03.990 see there is back to a 16 by 9 so I can crack straight on now and render out the animation. 11:05.290 --> 11:11.260 Okay guys render the final animation set up at your final render settings. 11:11.260 --> 11:13.440 Now you choose the number of samples. 11:13.450 --> 11:21.460 I'm going to use three hundred if you have a dedicated graphics card AGP you try using multiple instances 11:21.550 --> 11:23.770 of blender to render. 11:23.770 --> 11:26.520 Now caution this will stress your computer. 11:26.530 --> 11:32.650 Now I say caution here because if you're if you've got an overclock computer or you live in a hot country 11:33.010 --> 11:35.310 or your computer generally runs quite hot. 11:35.380 --> 11:41.920 You may find that doing this will overheat your computer and potentially crash it so do do this with 11:42.160 --> 11:43.030 some caution. 11:43.030 --> 11:49.600 Or certainly if you've got adjustable fans turn them up so more computers will render the frames across 11:49.600 --> 11:52.210 multiple computers to speed the process up. 11:52.210 --> 11:58.450 Only if you got access to them of course bring all the pictures together those pangea's into one folder. 11:58.600 --> 12:04.180 After they're done so Dropbox one drive can do that automatically for you. 12:04.180 --> 12:10.480 If all of the computers share the same accounts but otherwise drop them on a memory stick bring them 12:10.480 --> 12:11.960 across to the other computer. 12:11.980 --> 12:14.930 So go ahead and render your final animation. 12:15.110 --> 12:19.160 And typically I will not be saying pulls a video now and go ahead and do that. 12:19.210 --> 12:20.570 Just go ahead and do that. 12:20.590 --> 12:26.170 I'm not going to come back to you after this because it's probably going to take you at least an hour 12:26.200 --> 12:29.650 if not longer to render out this animation. 12:29.650 --> 12:32.550 Take care and I will see you in the next lecture.