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Hi all, this is rprentki with another tutorial video for EyeWire

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This is one of the practice cubes

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that comes after the tutorial cubes

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So you won't be getting direct feedback while you're working

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You'll get some afterwards and you'll also get some points.

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Let's get started

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you may notice that it gets a little bit blurry

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when I change slices, once in a while

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that's just caused by the

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site trying to load it and it's just taking a moment

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Once in a while you'll also get a checkerboard pattern

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and if you just let it sit for a second it will fix itself

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alright, so there's something odd going on right here

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that I'm not entirely sure what's happening

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so we're going to come to that later

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we're going to wait for it to connect to the big blue piece

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and that was the checkerboard pattern I mentioned earlier

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so if I slow down my scrolling through the slices

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it should stop doing that

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alright, so we're going to follow this blue one out

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this little one

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I'm choosing the smaller one because we're more likely

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to miss that later if we were to do the other one first

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and also I've got a hunch it may end earlier

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let's find out

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alright, so it looks like...

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there

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Okay, it looks like it may be going up this direction

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so, let's take a look at that

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alright, so that looks like it's...

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oh, that looks actually like it's wrong

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so if I go and look at this again in the 3D

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take a look at this

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let me zoom in for you and then drag it to the right

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by right clicking

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so this blue piece here

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this is what we're following

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this dark blue one

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and what should be added is something coming off of here

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see how this light blue one is sitting underneath it

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and that they don't mesh

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this is something that is just going parallel

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to the piece we are looking for

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so let's deselect that

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and go a little bit further

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okay, so let's try this piece right here

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alright, so this looks a little bit better

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see how that actually fits in

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to the dark blue piece

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instead of going underneath it

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that's what we're looking for

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so let's continue following this one

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alright, and it's hit the edge

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so let's make sure it just disappears

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not that one.

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okay, so it looks like it's time for us to go

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back now and trace the rest of this

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Okay, so right here is going to be a very tricky part

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if I hit shift, you can see that

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there's a dark outline

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around this, but there's also another

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outline in here

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so let's color this in

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and see what's going on

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Okay, so we just added this piece

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right here

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and to me

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it looks like this big piece

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that I just added is actually

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just hitting the piece that we are working on

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and, not actually a part of it

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so I'm going to trace out the piece that I think

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is a part of it, so

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let's deselect this for a moment

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Okay, so not that it is outside the inner lines

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so let's try tracing the rest of it a little bit

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Okay, so I think that

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this piece that we just added

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is correct

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and note how there's a little

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dent right here

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this is where the piece that we had was

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so let's put that back

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And you can see

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how this second piece, this piece on the left

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just fits nicely into the dent

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So I don't think that actually belongs

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so we're going to deselect that

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we can control click in the 3D

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and we're going to continue tracing this one

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so that's an exceptionally challenging piece

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that happens once in a while

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and what was happening is

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one piece of a neuron was gripping onto another one

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and so it formed a little dent, and it

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went around it

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What usually happens with those is

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sometimes you really can't tell, just from

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the 2D, and you're going to actually have to

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trace it out for a while

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and then suddenly you'll see that

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in the 3D that what you're working on looks

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really, really weird

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and you'll have to go back and find where that was

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alright, so it looks like that little branch

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hit the edge fo the cube

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so let's move back to the main

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part of the dark blue one, now

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double click, just relocate us

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make it a little bit easier 

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so we don't have to scroll back through everything

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and now, we can continue tracing

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alright, and once again this has a bunch of stuff

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around the edges 

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seems to be a cluster, almost, up here

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I'm trying to make sure I don't forget the stuff

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down at the bottom, because it can be easy to

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miss that, if you're working on a piece

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that goes across most of the cube

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You know, you can zoom out a little bit in the 3D

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just to see how much we have left

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and it looks like we're getting closer

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okay, so that little bit has disappeared

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so let's continue over here

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alright, and so it looks like this is a merger right here

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see how this is outside the lines

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you might think that's an error that the AI made

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that's a possibility, but if I look over

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on the 3D

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I can see that it's actually

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a little branch coming out

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and then bending back around

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and touching the original piece

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so that's what's going on there

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and if we follow it out a little bit

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we'll actually get to see it do that

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so watch this

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Okay, and see how that goes back around and touches that

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so it's allowed to do that, it's a normal thing

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it just can look like a merger

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if you're not quite expecting that

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and that's why also the 3D is useful

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because it gave a warning to what was happening

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alright, looks like

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everything has disappeared off the edge

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and that we're done with this challenging piece