Specifically I have an object that is symmetrical in shape, so the UVs are the same and I would like to copy part of the texture to another place of the UV map so that I can put in different details on each of them but use the same starting textures. Here's a screenshot to help clarify what I'm wanting to copy.
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$\begingroup$ you can probably go in paint mode and use a clone brush, see also blender.stackexchange.com/questions/27552/… $\endgroup$ – m.ardito Oct 8 '17 at 12:11
Activate the Magic UV addon
After unwrapping the mesh
Select a single face and set the face with the uv texture.
Press U and you get the extra option with UV Magic Addon below
Select Copy/Paste UV -> Copy UV- Default
Then select the face you want to paste or face with similar texture on other side
Press U
Select Copy/Paste UV -> Paste UV- Default
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$\begingroup$ This doesn't seem right, but maybe I misunderstand. I want to copy the texture, and then change the texture afterwards. This seems to be using exactly the same texture, which isn't what I want to end up with. I'll try playing with the UV Magic addon in the mean time. $\endgroup$ – user46081 Oct 8 '17 at 5:35
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$\begingroup$ with the L key u can select the uv and move where u need it $\endgroup$ – atek Oct 8 '17 at 5:37
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2$\begingroup$ I don't want to move the UV, I want to copy part of the texture. $\endgroup$ – user46081 Oct 8 '17 at 6:07
First, set your UV Image Editor to 'Paint' and then choose the Clone tool instead of TexDraw. Then set the clone image as the one you are painting so you can use it as a texture to paint with, and move it to position with rmb.
Paint at full power to clone the pixels into the new position from the repositioned image.
Turn off the clone source and then save the image progress.