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Maybe I'm just using the wrong search terms...

I want to paint some textures using an external program (shocking, right?). To do so, however, I need to know where to paint.

Is there any way to either stroke an SDS1,2 UV wireframe onto a texture, or, better, export the UV wireframe as an SVG? (Ideal would be if only selected geometry is exported, since in my use case I only need to paint on specific parts of my object. But there are relatively easy ways to figure that out from the entire wireframe, so it's not a huge issue if I can only export everything...)

1 "Export UV" doesn't preserve SDS2 outlines. It's not entirely clear if this matters, but I suspect it does?

2 Subdivision Surface.

Matthew
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    In the UV editor go to the UV > Export UV Layout menu item. If the side panel in the file selector isn't visible, click 'N' to show it and you can then select SVG under Format to save in SVG format. – John Eason Aug 27 '22 at 08:35
  • @JohnEason you're absolutely right. You should provide this solution as an answer to the question. – gcs_dev Aug 27 '22 at 11:09
  • The above link to an earlier answer is somewhat out of date now because it's for a much earlier version of Blender! The question was closed before I could format an answer properly. – John Eason Aug 27 '22 at 11:39
  • Yike! That extracts as an image? I'd assumed it dumped the actual coordinates to e.g. a text file . – Matthew Aug 27 '22 at 13:26
  • @JohnEason, that doesn't preserve SDS outlines, though. Are those representative of the actual UV used by an SDS, or are the "lies"? – Matthew Aug 27 '22 at 13:48
  • No It's purely an image of the UV layout as shown in the UV editor window. As far as I know there's no way of dumping the coordinates unless you start writing a Python script to do it. I've no idea what you mean by 'SDS'. – John Eason Aug 27 '22 at 14:12
  • @JohnEason, SubDivision Surface? And the problem is it isn't "as shown in the UV editor window"; the editor takes the SDS modifier into account, but Export UV doesn't. – Matthew Aug 27 '22 at 14:25
  • Ah! I see. I very rarely use the UV editor so didn't realise that. – John Eason Aug 27 '22 at 14:38
  • @Matthew How could be Subdivision modifier taken into account in the UV Editor? Can you share your screen? I can't even imagine how it could be visually/geometrically done. https://imgur.com/zGRXLTP ... Thank you – vklidu Aug 28 '22 at 12:47
  • @vklidu, I could've sworn I saw a difference in island edges, but apparently not. It definitely makes a difference inside, however. Just compare Sue (default UV will suffice) with and without SDS applied. – Matthew Aug 28 '22 at 14:10

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