Find an image that lends itself to being stretched.
Open the image and select the object that you want to stretch.
What I did on this image of the BMW is use the Magic Wand tool with the selection being subtracted and then I inversed the selection.
Copy the selection to a new layer (Control J).
Turn off the Background layer and clean up layer 1’s image. I’m going to erase the white under the car but I’ll leave the shadow for now. I can remove it later if I think it needs removal.
Next, I made a selection on the image where I think it will be easiest to piece the extended parts together and then I made several new layers with this selection.
Activate Layer 1 and Control Click one of the icons on a layer with just the selection on it.
I turned of the “eyes” of the selection layers and pressed Delete on Layer 1 to remove the selected area.
Turn off Layer 1 and erase the front part of the car (again with Layer 1 copy selected).
Now turn off the “eye” on Layer One copy and activate Layer 1. Erase the front of the car.
It’s a good idea to rename the layers so I’ll do it now. You can see the names in the next screen shot.
I used Ext to represent Extension Piece. At this point I don’t know how many extension layers I need. have 5 but I can delete or add layers if I need them as I progress.
Now I used the Crop tool to enclose the entire image and then I pulled the left and right sizing handles out to stretch the canvas.
Now I’ll move the front of the car to the left and the rear of the car to the right. I turned the Back layer back on to do this and I also held down the Shift key so the images didn’t go up or down.
I don’t know exactly where the pieces will end up in the final image so I moved them out close to the edges of the canvas. I can move them in later if I need to.
Now turn on the Ext 1 layer and move it (don’t forget to hold the Shift key!) either left or right. I moved it right in this example and aligned it with the front of the car.
Now I’ve used up all the Ext layers so I’ll duplicate Ext 5 several times so I have enough to continue the stretch. Also, I’ll rename the layers so It’s easier to determine which layer is where.
Now I’ll continue to move layers to fill in the area between the front and rear.
At this point I was satisfied with the length so I moved the Rear Layer to the left to complete the car.
Now I reduced the canvas with the Crop tool.
Now if you zoom in you’ll see that there a zig zag thing going on at the top of the window. To fix this I’ll use the Clone Stamp tool but first I’ll merge the all the layers making up the stretch.
Now to start cloning. Take your time and do a good job.
I’ve got a good section completed but as I go farther towards the front I keep getting wavy areas so I’m going to make some selections and then fill them with the color that I need.
I also made a second selection to fill in the black under the white line. I used the Eye Dropper to sample the color that I needed and then I Alt Backspaced to fill the selections. I still need to fix the area where the curve starts as well as the staggering in the window.
To fix the curve at the top front I used a small, hard paint brush and I kept pressing the Alt key to sample the colors I needed, then I switched to the Clone Stamp tool and picked the Square Brush set and constantly re‐targeted the areas to get the pixels from. It’s about half done in the next image.
I also made the black area at the top of the window nice and clean by using the Rectangular Marquee tool and filling with the black that I sampled with the Eye Dropper.
I used the Paint Brush with a hard edge to fill in the black trim line at the bottom of the window and I kept resampling with the orange and back to black, etc, to get the bottom edge right. I would click a dot with the brush and then hold down the Shift key and click at the end where I wanted the line to end to complete the filled area.
Next I’ll select the headrests copy them to a new layer and continue to create new layers with them to place them along the window.
To finish it off I’ll put another door in behind the first head rest. I’ll look at the original image to see exactly where it should go. I’ll make a careful selection of the seam in the door and the door handle and copy these things to new layers and move them into position. I’ll make sure that I select the shadows under the door handles, too. Then I select the window pillar and make two copies of it in layers and move them into position. I also painted the windows with a sample of the rear window color. I also used the Burn tool so it looked like the back window.
I merged all the layers except the Background and then increased the canvas size, moved the cars around so they could both be seen on the canvas. Then I gave it a new background.
Here’s another example that I did with a World War II bomber.
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