- [Instructor] Building on what we did
in the previous movie,
we're going to add some more detail to this pergola column.
We can extrude inward and we can also
convert polygon sub-object types
and that's going to help us in our cleanup phase.
The first thing I want to do
is create some ornamental detail
here at the bottom of the base.
And I've already zoomed in in the left view port
and I've revealed the grid here
which is set to only one centimeter.
I just want to create some new edge loops here
to create a platform from which I can extrude
some ornamental detail.
So let's enable grid snapping.
Doesn't matter whether we're in 3D or 2.5D.
And we want to enable the quick slice tool.
And to do that we'll select our object
and make sure we're in modify mode,
that is the modified panel is visible.
And we can initiate quick slice from the edit panel
on the modeling ribbon.
Click on quick slice.
And I want to create a new edge loop just one centimeter up
from the base right here.
So I can right-click so I don't lose any selection.
Click once and click again at the same elevation.
And I've got one edge loop.
Create another one two centimeters up from that.
Click once, click a second time.
And one more edge loop one centimeter up from that.
Again, click once and click again.
And now we've got all those edge loops.
We can exit out of quick slice by clicking on the icon.
We can exit out of snapping.
We won't be needing that again.
Let's get in close here in the perspective view.
I'll right-click in that view,
maximize it with Alt + W.
Dolly forward with a Control + Alt middle mouse.
And I want to extrude this area outward.
Let's go into polygon sub-object mode.
Select one of those polygons.
Select the entire loop with Control + double click
on an adjacent polygon.
Verify that with wire frame mode, F3.
All right, we've got that polygon on loop selected.
Go back to shaded mode with F3.
Once again, issue the extrude command, hold down Shift
and click on the extrude button in the polygons panel.
We have the same parameters that we had the last time
we opened this.
And so it says four centimeters.
Let's increase that a little bit.
We'll set it to five centimeters.
And click the check box to execute that command.
I also want to extrude this area inward.
I'll select that polygon,
hold down Control and double click on its adjacent neighbor.
That polygon loop is selected.
We can check with wire frame F3.
Go back to shaded F3.
Once again, go to the extrude tool, hold down Shift
and click extrude.
We get the caddy.
This time let's do a negative extrusion.
We can drag the spinner for the height
into a negative value.
We can orbit and with Alt and middle mouse check that.
Let's set the extrude height to negative two centimeters
and press Enter.
All right, pretty cool.
So that's what we wanted.
We'll click the check box and that completes that operation.
So I have this shape that I want,
but I can do some clean up here because we have some edges
that are not really bringing anything to the party.
They're not actually improving the fidelity.
They're just increasing the level of detail unnecessarily.
Let's remove those.
Go into edge sub-object mode.
And the edges of the extrusions that we just made
are highlighted by default.
Let's go into wire frame once again with F3.
I don't want to delete all those edges
because some of those are really important to the shape,
such as these here.
I'll deselect all that by clicking off the model
and only select the polygon edges that we need.
I'll double-click on this edge here
and that selects the entire edge loop.
And we might want to orbit or tumble around
just to make sure that we've selected what we think we need.
And then as we saw before, we can remove that edge loop
and its connected vertices
with a keyboard shortcut, Control + Backspace
and we just clean that up.
And we can verify by going into the vertex sub-object mode,
click off the model to deselect all those vertices.
And we don't have that unnecessary edge loop there anymore.
And we don't have the unnecessary
vertices on that edge loop either.
Okay.
So let's go back to a shaded mode with F3.
And again, let's orbit around.
We can actually select a single vertex
and orbit around that vertex.
Makes a little bit easier for us to visualize.
I guess the structure here in this area is fine
but if we examined the top and bottom of our column,
we can do some more cleanup there too.
Let's go to the top
and we see some unnecessary structure here.
So we want to remove these edges.
And we could do that one at a time,
but it really wouldn't be the optimal way.
We want to actually remove all of these at once
to make sure it's a clean operation.
That'll give me the opportunity to show you a couple of
fun things you can do.
We can, for example, grow or shrink selections
and we can convert selections from one sub-object type
to another.
Okay, so let's investigate.
Go into polygon selection mode.
Select this big center polygon.
And we can then grow that selection.
We've got a button in the modify selection panel, grow.
I can click on grow and now we've selected all the polygons
in that region
that are connected to the previously selected polygon.
Okay.
Now we want to convert this selection to edges.
Okay, so we can do that by using the Control key
and then clicking on one of the other sub-object types.
Let's try it. I'll old down Control
and click on edge sub-object mode.
And when I did that, it selected all of the edges
that were connected to that polygon selection.
So every edge that was part of any one of those polygons
got selected.
Now, if I remove this, I would have a problem.
I would actually remove these edges here on the corners
and that would break my model.
I don't want to do that.
I want to only select, in this case, the contained edges,
the edges that were not on the perimeter
of that polygon selection.
Just only the edges that were inside.
So I'll go back to polygon selection mode.
Instead of Control clicking on the edge sub-object mode,
I'll do a another keyboard combination
which is Control + Shift,
and then click on edge sub-object mode.
And now I've selected only the contained edges.
And then I can remove those.
I can use the remove tool.
I can hold down Control and click the remove button.
And that's removed all that unnecessary geometry.
And we can verify that those vertices got removed.
We can go to vertex sub-object mode
and there's nothing there anymore.
We need to do the same at the bottom of the base.
So I can navigate over there,
getting close on the bottom
and maybe disable the grid with the G key.
We can repeat a similar process there.
Let's go back into polygon selection mode
or polygon sub-abject mode.
Select that bottom polygon.
And this time we'll just convert this polygon selection
to edges.
Control click on edge sub-object.
We selected just those edges.
And then we can grow that edge selection
and click on the grow button.
That's accomplished the same thing as we did before.
We've got the same analogous edges selected.
And we can remove those.
This time we use the keyboard shortcut,
which is Control + Backspace.
And once again, we've cleaned up that model.
We can check our work by going into vertex sub-object mode.
And we see there are no edges and no vertices there.
Okay. I'll go back to object mode by exiting out of
vertex sub-object mode.
And that's a little bit about how to use various tools to
clean up the model and add a little bit of detail.