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I'm new to texturing so I just wanted to know what the disadvantages are of just using JPEG image or taking a high resolution picture from your phone for texturing cloth , then adding bump or displacement nodes instead of buying textures from websites with colour maps and normal maps

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It depends on what you want to achieve. Basically, JPEGs are not all bad, especially for photographed image textures they work just fine.

Typical disadvantages of the JPEG format are:

  • Compression artifacts (should only be a problem if you have low quality or need very high detail)
  • No transparency channel (can be a problem if you want multiple overlaid textures or stencils)
  • Limited colordepth (for height- or bumpmaps or environment textures, the number of colors and/or brightness levels can be insufficient)

As advantages, I'd name the following:

  • It's usually the most readily available format for images (if you take or download a photo in JPEG format, you won't gain anything by converting it into another format)
  • For typical photographic images, it uses comparatively little space on your hard drive
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  • $\begingroup$ For clothing textures such as T-shirt, jeans and coats. What would you recommend for this? I can’t find any website that has clothing textures $\endgroup$
    – Blenderinho
    Commented Nov 19, 2020 at 14:23
  • $\begingroup$ For those I'd say your idea with the photographed (or better: Do you have a flatbed scanner?) textures should work quite well. If you are not necessarily interested in super-detail, super-realism, you can even use the same texture for image and bump with pretty good results... But I really doubt that there are no websites with clothing textures out there! (Hint: Try searching for "fabric" textures instead!) $\endgroup$
    – haarigertroll
    Commented Nov 19, 2020 at 14:30
  • $\begingroup$ Flatbed scanner? Would that give super realism and super detail? Flatbed scanners sold in everyday electronic stores? $\endgroup$
    – Blenderinho
    Commented Nov 19, 2020 at 14:39
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    $\begingroup$ A flatbed scanner (yes, even consumer-grade machines from any electronic store) gives you distortion-free images with homogeneous lighting. Using one instead of a camera may save you some cleanup-work with the textures. But before you buy one, maybe search again for "fabric textures" - you will find that quite a lot of people have done that work for you already. Unless want to do it yourself, then I'd go with the scanner... $\endgroup$
    – haarigertroll
    Commented Nov 19, 2020 at 15:07
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    $\begingroup$ Here are a couple of websites I use that offer CC0 (Free for all uses, no restrictions) licensed textures. cgbookcase.com/… 3dtextures.me/category/fabric $\endgroup$
    – Allen Simpson
    Commented Nov 19, 2020 at 15:28

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