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3.2 How to Extrude the Craters

In this lesson, you will learn how to extrude craters into the moon model using the Extrude and the Bevel Tool.

3.2 How to Extrude the Craters

Hi, everyone, and welcome back to create a low poly moon with Cinema 4D. So in the last video, we took a look at the different ways that we could adjust the sphere to our liking and created the base model for our moon. Now in this video, we'll take a look at how to create the details of our moon, such as the craters, and look at how we can use the tools to create this. So the first tool that we'll need to take a look at is the Points tool, which is located over here. Now this tool, once we select it, allows us to manipulate the different points that make up this sphere. So let's go ahead and click on the Move tool here, like so, making sure that the moon is selected. We can now see that as I move the mouse over the points, the points highlight white, which indicates that we can select them. So let's go ahead and select a point and use the Move tool here to move it, like so, excellent. Now we can also press Ctrl+Z on the keyboard to undo an action. We can also select several points and move them all at the same time if we wanted. Now to do this, we'll need to select our first point, like so, and then press the Shift key on the keyboard. And whilst we're holding the Shift key, select the different points, or the points that we want to select on the surface of our moon, like so. And once we've finished our selection, used the Move tool to move it. And you can see now how we can easily create some sort of landscape forms by using this sort of technique, like this. So sort of creating some sort of mountain or a volcano. So let's go ahead and undo these actions by pressing Ctrl+Z several times, to go back to the way it was before. And now let's move on to the next tool. So the next tool that we will use here is below the Points tool, and it's called the Edges tool. So making sure that our moon is selected, we can choose the Edge selection tool. And you can see how as I move over the moon, the lines representing the edges sort of highlight white, indicating that we can select these lines. So let's go ahead and select a line and move it, like so. And again, we can select multiple lines by holding the Shift key on the keyboard and then using the Move tool to move it, like so. Excellent, so let's undo those actions. And finally, we have the Polygon, or face selection tool, which is over here. Now this tool allows us to select and manipulate the polygons that make up the moon. Once again, just selecting a polygon and using the Move tool to move it. And again, we can press and hold the Shift key on the keyboard to select multiple polygons or faces, excellent. So now that we are familiar with these three tools here, the way that we can go back to our original sort of manipulating the object as a whole is by selecting the Model mode button here. So once we've selected the model mode button here, we can then go back to how it was before. So now we can just use the Scale tool and the Move tool, as we did previously, just sort of selecting the model as a whole. Great, so we can only use these tools if the model is editable. Now you can find out if the model is editable by taking a look at the button here. Now if it's grayed out, it means it's editable. If it's white, that means you need to click on it to make it editable. So now that we're familiar with the main selection tools that we'll be using, let's go ahead and start modeling the craters for our moon. So we'll create the craters of our moon in two ways, to add a little bit of variety to the look of the moon. So the first way that we'll be creating the moon is by using the face selection tool, the Polygons. So let's go ahead and select that. And we wanted to select the area that we want our crater to fill. So let's hold Shift on the keyboard and select this area here. And from there, let's go ahead and right-click on this selection and click on Extrude. Now once the Extrude tool is selected, we can use this to extrude our selection in either a positive direction, like so, or a negative direction into the moon, like so. So for our first crater, we'll just do it in the negative direction for now. So once you're happy with the depth of the crater, simply let go of the mouse button and change the selection. Now, Let's go ahead and do that again, we can also input a number here. So if you wanted to input a number like -10 and hit Return on the keyboard, we can make sure that if we wanted all of our craters to be -10 centimeters, we can make sure that it's -10 by using this offset here, great. Now that we have our first crater, the next step is to create another crater. So let's go ahead and create another selection. So using the Selection tool here, let's go ahead and select these triangles here, or these polygons here. And once we've got this selection selected, let's go ahead and press the right key on my mouse. And let's go ahead and click on Extrude Inner. So by using Extrude Inner, we can click and hold on our selection and we can actually create some more polygons here. And you can see now that this selection is smaller than our original selection. And this is how we can create different sizes of our crater. And once you're happy with the smaller size crater here, just simply right-click and extrude it again. And we can go ahead and press -10, like so, making sure that it is the same depth as our previous crater, excellent. Now the third and final way that we can create a crater is by clicking on the Selection tool here. We're going to select all these triangles, like so. And let's go ahead and extrude this selection in the positive. And we can use the Scale tool here. Now just clicking anywhere on the viewport to scale uniformly, like so, just going to bring it in slightly. And then combining the techniques of both these craters let's go ahead and right-click Extrude Inner. And then once you're happy with the size of that, let's go ahead and right-click Extrude, and extrude in the negative again to create a third crater, excellent. So now that we're familiar with these techniques, in the next video we can go ahead and fill up the rest of the moon. See you all there.

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