Step 5

Now select one of the top corners, either left or right; it doesn't matter. Hold down the Shift, Ctrl, and Alt key and drag the point towards the outer edge. You can see that it distorts. Now while looking at the grid, adjust it so that the vertical edge of the building matches the straight vertical line of the grid. See how the grid helps you know if you're building is straight? If you want, you can do a small experiment by repeating this step without the grids. Turn the grids back on and you can see how difficult it is to get a perfectly straight vertical without using grids.

Step 6

OK we're done fixing the tilt, but doesn't the building look a little short now? This is one of the most common mistakes made by many people who fix perspective. They made it straight, but it looks short and many think that's just natural. Well, it isn't and let me show you why. In the previous step when you used the transform tool, it increased the width of the layer and as a result the vertical of the image gets distorted. You can see what I mean if you change the opacity of the top layer to 50%. So change the opacity to 50% and you can see that the building isn't this low and it isn't any optical illusion. In the next steps, I'll show you how to fix the height of the image to make it look natural. It's very easy.

Step 7

Press Ctrl+T to bring up the transform tool again. Because we have the opacity at 50%< we can see the layer below and compare the height of the building from the two layers. Select the top middle joint from the Transform tool and move it up until the two buildings are of equal height.

Step 8

We're done so change the opacity to 100%. If you hide and unhide the top layer, you can see the before and after effect of fixing the perspective for this building.