From the course: AutoCAD: 3D Architectural Modeling

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Perform a Boolean subtraction

Perform a Boolean subtraction - AutoCAD Tutorial

From the course: AutoCAD: 3D Architectural Modeling

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Perform a Boolean subtraction

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- [Instructor] At this stage, I'd like to use these lines on layer zero to cut the walls on the second floor back. I'll start by isolating the layer zero, type layiso, enter, click on one of these white lines and press enter, and now I'd like to turn these into surfaces, I'll use the region command, reg, enter and select these four edges and press enter. That creates a region. When you create the region, it deletes the lines that defined it and I can prove that to you by erasing this. You can see that those lines are gone. So I'll undo. Because of this we need to recreate the line that runs along this ridge, or valley rather. And then make a region which includes this line and then these three others. And again over here we need to draw an L line and make another region which includes this line and these three others. So now we have three regions. Let's copy these up, well above the building. And now I'd like to create a volume between the regions. We can do that on the surface tab by…

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