3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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No porn (NSFW prints are acceptable but must be marked NSFW)
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No Ads / Spamming / Guerrilla Marketing
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Do not create links to reddit
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If you see an issue please flag it
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No guns
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No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
Moderation policy: Light, mostly invisible
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Like others have said, if you're just trying to make a raised version of a simple flat design, that's easy. Ideally convert it to a vector first, and then import it into just about any CAD software. Even TinkerCAD can do that.
If it's more of a real 3d object, i.e. varies across a few dimensions, first consider how complicated it is. As long as there aren't too many organic curves, the best route might be to take careful measurements and recreate it from scratch in CAD.
Finally, if none of those options are possible, it's time for photogrammetry. Mix up a simple solution of isopropyl and zinc oxide (or anything talc-like i guess, I dunno), and use a quality sprayer bottle to speckle your object with it. Try to illuminate the object well from only a single source. If you can, pick up some cheap cross polarizing filters, use one on the light source and one on the camera. Take shots at the same distance from as many angles as you can, covering the whole object, ideally with a matte background. As mentioned, Meshroom is pretty decent at turning such a photoset into a decent object, but it does rely on you having a reasonably powerful PC. Alternatively, OpenScan offers a free cloud based option. (They're also just very cool people who do lotttsss of other stuff, my makerspace just built one of their "Mini" rigs. Works great btw!!)