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Read this first!:  Like many other methods in Photoshop, there is usually more than one.  This is just one.


Alright!  We are going to take the wheels off the black car, and then put them on the blue car and hopefully at the same time achieve an effect of realism.

 

 

 


First we are going to replace the front wheel.  So make a selection around the front wheel of the black car using the ellipse selection tool.
If you don't get the selection right the first time, fear not!
Simply go:
-Selection
   -Transform Selection

Drag the edges/corners as necessary.
Press "Enter" when you are done.

TIP:  Try and select a little bit of the black tire around the rim, it may help out a little later.

Now go:
"Edit - Copy"
then click on the canvas with the blue car and go:
"Edit - Paste"
Now we have a wheel to work with.

Tools used this step:
Ellipse Marquee

 

 

 

 

 

 

 

 

 


Since our cars were facing the opposite direction, we'll have to make it so the wheels appear to be going the same way; and here's how:
After you've made your selection, go:
-Edit
   -Transform
      -Flip Horizontal

This will make the wheel face the right way.  Now you'll see the wheel is not the right size and is much bigger than the rim we want to replace.  Time for a little resizing . . .

 

 

 

 


While you have the layer with the wheel selected, go
"Edit - Transform"
and drag the various points of the box so that your wheel covers up the existing wheel.
See how that extra black around the rim is paying off from a few steps ago?

TIP: Hold down "Shift" while dragging to keep your wheel scaling equally.
(also known as "constraining".

 

 

 

 

 


Now you'll notice that some of your wheel overlaps the front fender of the car.  To fix this, simply use the polygon lasso and trace the edge of the fender (its easier to do if you turn off the visibility of the wheel layer).

Then (while the wheel layer is selected and visible) simply press the delete key!  Now your wheel doesn't overlap anything that its not supposed to.

 

Tools used this step:
Poly Lasso

 

 

 

 


Now that should ALMOST do it for our front rim conversion. We just need to match the rim's colors/hue/brightness to match the picture we dropped it in.  This wheel is pretty close already, but it looks like it could be a little more shiny.  So to do that I am going to go:
-Image
   -Adjust
      -Levels


Then drag the far right arrow to the left a little bit.  You'll see the wheel get brighter without distorting it to much unlike what the "Brightness/Contrast" option does.
 

 

 

 


We're going to repeat the same steps to swap out the rear wheel.  You may have to scale the wheel a little more and do some more transforming (such as rotating and scaling horizontally).

You can see here both black and blue cars with the same rim now.

TIP:  I added a hint of blue and cyan to match the setting of the blue car.  To do this go:
-Image
   -Adjust
      -Color Balance

 

 

 

 


ta-da!  Where have our blue car sportin' some 18" Racing Hart C5 rims.

(The original rims on the blue car were 17" Konig DTMs if you're wondering)

 

 

 


 

TIPS: - Try avoiding rims like the ones below:  Why? Because it doesnt have any rotors/brakes!  It will look quite funny if you put these rims on a car.

 

 
   
   
   

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