Are free printable coloring sheets protected by copyright laws that restricts change in the org desi

are free printable black and white images protected by any copyright law that prohibits or restricts the change of the original image by 3D design and making a profit of the new creation. such as a cow skull coloring sheet that is free for printing, outlining the image and creating a 3D image in a special software and making it onto another medium such as wood. are we still allowed to sell it or are copyright laws restricting the change of the original image in the first place?If not can we still sell the new 3D image?
Asked Oct 18, 2013

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