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Picture of Seamless Photographs
There are three ways to get seamless photographs.
1. Use a large enough background.
2. Use a seamless backdrop.
3. Filling in the background.
I am going to discus filling in the background with a simple program like paint.

Step 1: Background

Picture of Background
I start by creating a mottled background if you don’t have one you can make one by selecting, copying and pasting a photograph of anything.
That is how I created these mottled backgrounds, I selected a ½ inch square, copied and pasted then reselected a ½ inch square, copied and pasted until I created these background.
 
Blechmen3 years ago
Hey this is a cool way of doing this but ya I use gimp when I do this kid of stuff but I have never really thought of using paint.
Josehf Murchison (author)  Blechmen3 years ago
I just got gimp and havent had a chance to play with it.
Gimp is really fun the best way to get familiar is just to play around with it. have fun
doflagie3 years ago
Good job. And I'm really glad to see you use Paint. Everyone that has windows will have Paint and not have to buy an expensive program to do this.

I don't know if you've seen it, but GIMP is a pretty powerful imaging software package. And the price is right, it's free. GIMP will do a pattern fill with a pattern you create.