When you want to draw in perspective inside of Illustrator, you have to define a perspective grid on the document that you're working on. In this particular document, basically what I want to do is map something to either this side, or this side of the building. In order to do that, I am going to utilize a Two Point Perspective grid. The first thing I have to do is turn the grid on, and I can do that by coming over to the left, and clicking on the Perspective Grid tool. Once I do that, the grid appears onscreen, and I'm able to start making changes to it. I need to first zoom out though, so I can see the full grid.

Once I do that, I'm able to change things, like the horizon line, and also the floor. In this case, I think the floor is pretty close, but I need to drag it down just a little bit. I want it to match the base of the building right there. I also need to move the grid, so that the seam of the grid fits with the seam of the building. So I'm going to use this handle here to drag over, and I will match it up like that. The height of the grid should also match the height of the building, and then I might have to adjust the floor just a little bit more; something kind of like that.

Now I need to adjust the horizon line as well, or the view line, because I am technically looking up and under at this thing. So I need to click, and drag down the view line. And I'm basically looking for these lines in the grid to line up with the lines in the drawing. Once I think they're close, I can let go of the horizon line. The true test will be when I adjust the vanishing point. The vanishing point controls are here and here. I will use this vanishing point first.

I'll drag this out; it matches pretty good. Then I will pan over, holding down my Spacebar temporarily, and I'll drag this vanishing point out, and again, that matches fairly well. It doesn't necessarily match with the bricks down here, but as you can see, they've got their own seam, so this would actually be a completely different set, which is OK. Once I'm done, I'm ready to start adding some artwork to the perspective grid, but first I have to make sure that the correct grid is targeted.

So for instance, if I happen to have the orange grid targeted, and I didn't realize it, I could start drawing something out, expecting it to snap to perspective over here, and it'd wind up completely looking different than what I wanted. So let's undo that, and then come up here. Remember, you can use the keyboard shortcuts 1, 2, or 3 to change the grid. In this case, I will want to on work number 1, or the blue grid. I'm then going to grab a rectangle, and I am going to simulate drawing a banner over on this side of the building. I can just come right here inside the grid, and I can click, and start drawing.

And the banner goes right along the side of the building, just like it's supposed to. If I switch the color, you can see it a little better. So it looks like it's just draped over the side, and I could position that anywhere I wanted to make it a little bit more realistic. You can also adjust the perspective grid after the fact if it doesn't look quite right, but in this case, it looks pretty good. If you want to remove that artwork, all you have to do is Delete it, and it'll be removed. You can also add any type of freeform drawing that you want, like an ellipse, a polygon, or even a star.

So if I wanted to draw a star, I just bring that out, click, and draw it. Once it's where I want it to go, I can release, or if it's not that where I want it to go, I can then use my arrow keys to kind of position it, like so. And there it is, on the side of the building. So once you've defined your perspective grid, and you've got it all lined out the way it should be, according to the artwork that you're working on, it's really easy to start adding artwork to the planes. However, you may find the need to add static artwork, or two-dimensional artwork to the planes as well; either something you've created in another document, or some text that you might type out while inside you're inside of here, and we will cover that in a future movie.