I still use cura as it has all my printer profiles and I can’t be bothered to remake them in Bambu studio/Orca.
If I download a 3mf from maker world it won’t open them in Cura. It gives the error “There where no models in…”
Are makerworld adhering to th 3mf standard (is there even such a thing)? I have to download the 3mf, open it in bambu studio and then export the STL to open it in cura.
"From version 1.8.3, Bambu Studio’s 3D model file format (.3mf) is compatible with the 3mf reading code provided by 3MF Consortium
"
Read the full compatibility notes here.
https://wiki.bambulab.com/en/software/bambu-studio/3mf-compatibility
Specification - 3MF Consortium and on https://3mf.io/ ultimaker is listed, but not Bambu
Does cura produce good prints? I used to use it and switched to prusa slicer for the additonal features, which allowed for better print quality. That was before Orca and Bambu added more.
sometimes technology advancement is a good thing… I dont know why you would be scared to make the leap to bambu studio its much more user friendly and has advanced features… im predicting eventually you will make them move, so why postpone it… most default print profiles work great. just my perspective
Agreed but I’m just lazy and if something works well (for me it does anyway) then why change. I don’t have a Bambu printer yet so haven’t needed to change.
That’s my point it can read the files produced by any other software but can’t output them in a format that is compatible.
I’ve just opened an stl in bambu, saved it as a 3mf and got an error opening in Cura. Then took the same stl, saved as a 3mf from Cura and opened with no issues in bambu.
They even say this on that link:
We deeply understand the critical importance of file compatibility for user’s work and creative endeavors. In light of this, we consistently strive for improvement and optimization, aiming to align with standards
Seems silly to not comply with the standard in the first place.
Are you exporting as generic .3mf, or saving project as .3mf?
Just as @debonr said, please use “File => Export => Export Generic 3mf”.
I did a test on CURA, the generic 3mf worked.
To save confusion, but possibly it would cause other problems, then the save project .3mf could have a file extension specific to bbl, say, ‘bmf’ extension (but IMSI use that). Most software saves files in an internal format, as well as exporting more standard formats.
The problem is that no one does that on makerworld. If I download a 3mf from makerworld it will not open in Cura, I have to open it in bambu studio then export the STL.
What extra data is in a bambu studio 3mf that doesn’t make it compatible the standard?
I believe one example is how you can have multiple plates.
I don’t think anyone doing hobby 3d printing really uses cura anymore. The only company I know shipping it is Elegoo, who ship an old version, and everyone just uses OrcaSlicer or PrusaSlicer instead as Cura has so many bugs.
A 3mf is a zip. Rename it to zip and unpack it with e.g. winrar. No need to open it in bambu studio to get the STL.
Just a note here. The STL is not present at such inside the 3mf file. There is a .model file but I’m not sure if there is a way to convert it back to an STL/STEP file.
For models that only has print profile (no STLs), we are developing a feature to generate an STL zip from existing print profiles, and let users to download.
This is great news. Bit late, I bought an A1 in the sale 
Does Anyone know how to do it the other way around? My old cura files just refuse to be opened or changed into Bambu files for maker world.
Welcome to the forum! They are two completely different slicers with different settings and ways of storing data. I know it seems like they’re similar because the .3mf is the same, but they are different.