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: !functionalprint@kbin.social 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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I think it depends on how you want to make your models. TinkerCAD looks to be more like making models with Clay, drag, drop pre-made shapes to make your models. If you are looking for more of that then perhaps you are looking for Blender or Maya. Both of these softwares can make the models that are 3D Printable.
Most of the advise you will get from those who 3D Print are machines, who want their designs to be mm perfect. Exact lengths and exact shapes dictated by measurements. Which is something that most CAD software like you've listed do very well.
For beginners who want to learn this kind of CAD, from my experience Google Sketchup and Fusion 360 are great starting points due to the treasure trove of online resources. But from my personal usage, FreeCAD fits my design style perfectly, allowing me to make everything I could in Fusion with a lot more precision.
TL:DR You might be looking for software like Blender or Maya, vs CAD software like Fusion or Google Sketchup. All these software will do what you are looking for, but I think it depends on how you want to make models.