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Removing street reflections from bodywork of car

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  #1  
Old 01-28-2002, 04:28 PM
bfeely bfeely is offline
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Removing street reflections from bodywork of car

I am in the process of trying to digitally remove street reflections from the bodywork of a dark blue porsche on a bright sunny day in the middle of the city. The bodywork is reflecting buildings and other cars.

Can someone give me some tips as to how to convincingly remove these reflections to replace them with the natural bodywork reflection of light hitting a metallic surface. I did follow a tutorial at a site by Computer Arts in the UK, and they suggested:

http://www.computerarts.co.uk/tutori...l.asp?id=22541

1. Create a selection of a reflection.
2. With the eye dropper tool at 3x3 option, sample the bottom and top of the selection as the foreground and background colours.
3. Draw a linear gradient in a new layer using these colours - then change the blending mode to luminosity.

But all I am left with is a murky green/brown patch.

Thanks
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Old 01-28-2002, 04:40 PM
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G. Couch G. Couch is offline
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Is there any way you could post the image?
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Old 01-28-2002, 10:04 PM
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DJ Dubovsky DJ Dubovsky is offline
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I have to agree. A lot of the help here is given on the fly, meaning we actually try and see what we can come up with and the only way we can really know your specific problem is if you post a picture or even a portion of a picture showing a trouble spot.
DJ
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Old 01-29-2002, 07:37 AM
bfeely bfeely is offline
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OK

I will do that later on today - about 7pm, I am about to rush out now.

Thanks for your interest

regards
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Old 01-29-2002, 12:35 PM
bfeely bfeely is offline
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Well, I suppose it would be obvious why a selection on a layer in luminance mode would turn out brown if there is a lot of that colour in the reflection. Which it has.

I think now that there is not going to be an easy way around this. I presume I am going to have to just be patient and careful with the airbrush. Building it up in layers, darker to lighter.

But any tips would be helpful.

Regards

Bernadette
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Old 01-29-2002, 01:25 PM
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DJ Dubovsky DJ Dubovsky is offline
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bfeely
There’s probably a better way of doing this but here is what I tried.

First I went into quick mask mode and painted the area on the top of the hood (minus the dark indents) with a soft brush. I then went to channels and activated the alpha channel and ran a gaussian blur to soften the selection a bit more.

When I was finished I exited quick mask and with the selection active, I created another layer and activated that layer. I then used the eye dropper tool to get the color of the car just outside the lower edge of the car and putting that as my background color I used the eyedropper to get the color of the highlighted part of the care but not the brightest part and set that as my foreground color. Maybe a soft grey blue.

I chose the gradient tool and applied the gradient to the selected part of the new layer so that the shine and gradient followed the line of the car. I repeated this until I got just the right grade and angle of slope. I lowered the opacity slightly until the reflection just barely showed through and added a layer mask to clean up any spill over edges.

Finally I merged the layers and used the clone tool at about 25 to 50 % to get a softer blend from top to bottom of the hood. After doing this you may need to run a noise filter to make the area look as if it matches the rest of the car better.

Like I said, there may be others that have a better way of doing it but that’s what I came up with in trying it out. Good luck and don’t forget to let us know how it goes for you.
DJ
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  #7  
Old 01-29-2002, 02:15 PM
bfeely bfeely is offline
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That's a more convincing finish than I think I would have got via by own approach. I will, however, not be able to get to grips with this image till the weekend. I will upload the image on to this thread when it is completed, and maybe some people can make helpful suggestions as to how to make it look convincing.

That's the difficult bit with retouching on this type of imagery. Making it look convincing and 'untouched'.

Regards
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Old 01-29-2002, 04:30 PM
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Hankster65 Hankster65 is offline
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Nice job, DJ!
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Old 01-29-2002, 04:32 PM
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G. Couch G. Couch is offline
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I took a very similar approach as DJ.
Made a selection of the hood. Copied it to a new layer and applied a gradient. added noise and Gausian Blur.
I erased through the top layer to get the dark indents back.
I added a third layer for the reflection. Flattened the layers and used the clone tool to clean up and blend things together.
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  #10  
Old 01-29-2002, 05:57 PM
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DJ Dubovsky DJ Dubovsky is offline
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Thanks Tim

G
I even like your rendition better than mine. You took it a step further and really added more of a shine and carved out the hood better. Excellent job. I think Bernadette has a good outline to work from.
DJ
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