Maxon's BodyPaint3D has some rather powerful "image editing" (including painting) tools. Can incorporate and use Photoshop filters. Although there is a standalone version, the version for Cinema4D is integrated into the rest of the 3D modeling and animation package. So, yes, there are 3D applications that allow you to edit an image in it - create them even.

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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