Welcome to rendering across multiple blenders in this video.
You use multiple computers to render an animation.
Learn how to use multiple instances a blender to utilize the s.p. you and GP you on your computer and
finally decide on how many samples for the final animation.
So let's help stray Tom over into Blender's.
So first of all let's decide on how many samples are final render is going to be.
So looking at our scene in front of us here that is just with one sample.
And that is quite grainy.
That would be unacceptable for a final render.
So we need to simply up the samples count and see what we get.
Now in the 3D view itself if we can hop around to the camera position at this point in time we'll see
roughly what the camera sees as it pans around.
So if I go to that end state and go to camera that's the scene that we can see.
And I'm going to set my render border kind of like that.
So I'm going to hold down Joel and B and just go around our lamp there.
I don't want the whole scene being rendered just that area there I want a switch on rended view after
I've gone down here and changed the preview of had it set to 100 and change it down to one.
And I'm going to go to a rendered.
So this is roughly what it looks like at the moment.
And you can simply keep on increasing the preview samples here as long as you don't move the viewport
or recycle your windows.
It will just keep adding the samples to it and we can see at the top here of of the viewport.
It's a sample four of four.
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
we'll get a good impression of how that final render will look ultimately the more samples you have
the more and more detail you will end up with at the end.
Now that has to be weighed off against the time it takes to do the render.
If this was a presentation render then obviously you'd want to spend as much time as you physically
got to doing it or a final render for an animated film or something like that.
But in this case we've got to make a decision as to when the sample rate is high enough.
Now whenever I've done things in the past I tend to set it greater than 100 to be quite honest maybe
in two or three hundred.
And if you were really working on something that's got a lot of detail in the scene perhaps even glass
of something on those lines.
You'll want it even higher than that.
Just get the clarity out so it does of course depend on your scene itself and how detailed you want
to be saw at 50 at the moment.
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.
Now if you want to speed things up when you do the rended animation you can do something quite clever.
Now it does depend on the speed of your computer how you parcel this out.
So I know that my GP is slightly slower than my CPA you on this particular computer and I can utilize
both of those so we'll cover that one first.
I am loathe to interrupt this.
Some going to let that render out to 300 and see what it looks like and join you again in a few moments.
Okay so looking at 300 samples.
That's pretty neat.
There's very little noise in the scene that I can see there's a little bit around the lamp base but
I think they'll be absolutely fine for me rendering at that.
Without of course waiting weeks and weeks and weeks for the render itself.
Okay so with multiple instances of blender on one computer.
Now if you've got a dedicated graphics card in the computer and it works with blender then you will
want to do a test render just with the GP you and will do that now.
So you've got this scene here with 300 samples of calls going to resample in a moment along the switch
across to GP you compute and see how that comes out and we can see it renders it pretty much exactly
the same as our s.p. used.
So I'm happy with that.
So I'm going to switch that back to see you for the moment and I'm going to get really cramped on the
screen please bear with me.
I'm going to save this file.
I've been working on and I'm going to go half screen with my work.
I'm going to open up another instance of blender and I'm going to shove that over the other side of
the screen and it's very very tight on here so let's just see if we can make it a little bit easier
to see.
And there we go save that file there.
And I'm just going to turn off the rendering at the moment so it doesn't start rendering automatically.
We save that.
So over here I am going to open up.
This is a separate instance of Blender.
So now we've got the same one across multiple instances on blender.
Now the secret here.
Well that's not really secret but don't tell me what the secret here is to literally.
On this one computer.
I would set the start and the end does perhaps not 80 knowing that the s.p. is faster.
And on this side I would start 81 and end 120 and therefore both sides are going to be doing their own
thing are going to set the device here to GP you knowing that this size is going to manage it with the
s.p. you so we can have a look at that across there see P in GP you and then finally I can literally
just go to render.
Well let's set it up here first before we do that.
Before we do any renders we need to change this to 300 as we said before.
And the same on this side of the render samples of the site.
Okay.
If you would set that before opening up the same file the settings would apply.
So just a follow good practice I will quit the one that I've been mucking around with save this file
over here open up a nother instance of blender.
And I'm going to open up our animated lamp file again.
And that makes sure that any of the settings we change on our actual main lamp are reflected across
here.
And then finally if I just scroll down your samples of the same face should be exactly the same start
an end of the start and end on this one is not 80.
And then finally across here we've got these start and end at nought to 80 so we'll want this one eighty
one to 120 was our last bit.
Excellent.
So that's now ready to render.
And if we simply went.
Well no it's not.
Before we do that it's very tempting to just click render.
Let's make sure the output folder is the same.
But up at the top here.
So I'm going to just go up here and I'm going to create another Directorate and go lamp three hundred
final.
That's absolutely fine.
I want to select that and accept and I'm just going to start the render going over here so render animation
so that once started going now there's a couple of things on the GP that we need to change.
I'm going to change my tiles size here so it's slightly larger.
I can't remember which one was good but I think 2 5 6 2 5 6 would be absolutely fine.
I make sure we are using the GP so that's set there.
And then finally we just need to make sure it's directed to the right folder.
So in downloads lamp 300 final and accepts and then when I hit render and run around animation on here
this one will be dumping from s.a.t. or sorry frame 81 to 120 and off it goes.
Now you can use the same principle across multiple computers.
So if you were sharing files via a drop box you could literally save the files in the drop box and when
all the computers have finished rendering There you go you've got your b.n. GS and this case ready to
go ready to make into a movie.
So if we were using multiple computers again I would divide them all by the speed so you'd have to work
out the relative speed of each computer.
And so in this case we can see that it's going to take about a minute to do this rendering here and
it's going to take slightly over a minute to hear.
So I know to split it up in this sort of 60 40 principle but I've got another computer in the office
just over the way if I go and get that I know that is slightly faster than our than the computer I'm
currently working on when it comes to rendering but it's only got s.p.
So if I was utilizing that one as well I would set it to 30 30 no not 30 30 40.
It would probably be more like 50 s.p. or in this machine 50 on the other machine frames and then 20
frames on the GP.
And it probably finished off the GP quicker than anything else.
But that's absolutely fine.
I don't mind if that's what happens.
So we just leave it now to render out and we end up with our polished scene at the end.
Okay so one quick final.
Learning that I almost overlooked Now the screen slightly different.
You remember earlier when we were looking through the camera and we set up a render border in the camera
itself.
Now you will notice that if we had actually gone through and rendered the image that's no longer this
16 by 9 aspect ratio that we use to happing especially since that itself if we scroll up here is the
dimension of the render.
Now when you have it set like facts that render border.
It affects the final render to certain this.
Cancel that now.
Let's go back and see this red render border that we applied whilst in the camera review will actually
change what comes out on the final render.
If we set one up anywhere else so if we rotate round here insert another one up that won't matter.
That won't change it but the camera one has a separate render border.
So before you go ahead and render out to your spend hours rendering and find out you've cut off the
edges of your scene.
I do suggest you clear that border before doing so.
I just spotted it watching them render I didn't see it when the screens were condensed like that so
control Oulton B will remove that from our scene and I just quickly do a quick render test and we can
see there is back to a 16 by 9 so I can crack straight on now and render out the animation.
Okay guys render the final animation set up at your final render settings.
Now you choose the number of samples.
I'm going to use three hundred if you have a dedicated graphics card AGP you try using multiple instances
of blender to render.
Now caution this will stress your computer.
Now I say caution here because if you're if you've got an overclock computer or you live in a hot country
or your computer generally runs quite hot.
You may find that doing this will overheat your computer and potentially crash it so do do this with
some caution.
Or certainly if you've got adjustable fans turn them up so more computers will render the frames across
multiple computers to speed the process up.
Only if you got access to them of course bring all the pictures together those pangea's into one folder.
After they're done so Dropbox one drive can do that automatically for you.
If all of the computers share the same accounts but otherwise drop them on a memory stick bring them
across to the other computer.
So go ahead and render your final animation.
And typically I will not be saying pulls a video now and go ahead and do that.
Just go ahead and do that.
I'm not going to come back to you after this because it's probably going to take you at least an hour
if not longer to render out this animation.
Take care and I will see you in the next lecture.