 Welcome back to part 16. Wow. We've already been through so much together I feel like we're probably best friends now So we've got a bond that will transcend the generations anyway as promised in this step We are going to create our window using extrusion which we touched on in the previous step So we're going to need to turn on our room layer for this So I'm just going to put a V there and we can see this is apparently the angle that I'm looking at my room So I'll just spin that around Lovely and now I want to put my window in over here So in order to do that the first thing I want to do is put my room Into or this wall specifically into face mode So I'm going to do that by holding the right mouse button and choosing face and then releasing the mouse button You can see now that each face is highlighted in red to indicate that I can select it So what I'll do is I'll select this face here on the inside and I also want to just swing around And holding shift and left clicking I'm going to select the one on the backside as well This is so the window will go all the way through we need to do this extrusion on both sides So you can see I've now got both sides selected You can also if you want to just do a marquee selection like that through And that will select what's on the front and back of that selection Okay, so with those both selected the next thing we're going to do is extrude them So I'm going to get extrusion here from edit mesh And just click on extrude you can see the keyboard shortcut is controlling e and that's how I normally do it So there is extrusion. So you get this little box over here. This gives you some things that you can change And you also get this universal manipulator tool here. You can see this has got a rotate Scale and move all built in to the extrusion tool after you've done it Which can be really useful. So I'm going to use this tool here. So I'll click on one of the squares for scale And then if I just bring that scale in you can see that that brings it in like that And it should be doing that so that it's flat and it's happening on both sides So I want this window to be fairly square So I'm just going to make it square and I'm just going to use the move tool on this manipulator as well to move it into place So I want to Sometimes the the move tools can be inverted on this one And it might be that yeah, so you can see there the move moves it up on one side, but down on the other So I'm just going to undo that because I want them to be at the same height That's okay, and I will switch to the normal move tool to move that up So now we're going to change tools here To the move tool and then move it up and you can see that that now happens together And then I'm just going to scale it up so that this window kind of fills this area Yeah, that's nice and what's good about this is that the geometry all still makes sense So I had one quad which is a four sided shape here and I've now split that into more quads So I've got a four sided shape here one here one here one here and one here So the geometry still makes sense and still flows now that that's done I just want to delete both of the faces So I'm just going to hit my delete key and that now creates us our hole in the wall So that's our first extrusion done. Well done. I am really proud of you in the next step We're going to patch this up so you can see what that's done is created holes inside. We've got this hollow Area and we don't want that. We want some geometry to fill that So the next step will be all about filling holes naughty Game Dev Academy is graciously supported by these absolute legends If you'd like to offer your support then check out our patreon page using the link in the description below