ArcWelderLib VS fluidfoam

definitely arc welder, but you have to have g1 g2 enabled on your firmware. read this command here here and you can download the console app to run it on your exported gcode on arcwelders github

For other slicers, you will need to use a script like ArcWelder (Cura Plugin) (Script for other slicers)

Look into Arc Welder for further explanation and as a potential solution (though it is not perfect and can have its own downsides). The OctoPrint plugin is no longer maintained afaik, but there is a Cura plugin and other slicer post-processing methods.

You could also post process your sliced model through ArcWelder and get perfect arc curves for your print. It will go through the G-codes, detect curves, and change them to G2/G3 arc codes removing the edges completely.

if you're feeling really adventurous you could manually apply arcwelder using CLI https://github.com/FormerLurker/ArcWelderLib

OP I am so glad you asked this because more people need to know how to do this. Please do yourself a favor and check out fluidfoam. It will change your life. I was trying to do a very similar thing to what you're doing and spent months looking into things like pvpython, pyvista, etc. None of them are even close to as easy as fluidfoam. What you will have to do is go and look at the example files they give. Those probably won't work right away but they are quite easy to debug and adapt.

I found a really nice library for doing this in Python called FluidFoam and have implemented its functions. I want to do this faster however, because I want to make lots of animations and I don't like waiting several hours to compile all of the frames for a single animation. I heard Julia is much faster than Python and I have been meaning to learn it for some time now. Maybe I can use this as an opportunity to learn it whilst speeding up something in my research. If such a package exists for Julia or you have any other thoughts about what I can do, please let me know!