Next I came across a conical slicer
https://github.com/RotBotSlicer/Transform
I managed to get him to do the same thing he does Slicer4RTN
But this also did not give the correct result.
Spring has come, it's time to work. I work as a builder.
I haven't touched this topic for almost a year.
During the winter holidays I started looking again,
and was surprised to find that in Creality Print
in experimental this mode is implemented.
called Angle of Slope Slice
My joy knew no bounds, but after trying it I realized that there were shortcomings, extruder rises high when changing each layer.
I wrote to them on github describing the problem.
https://github.com/CrealityOfficial/CrealityPrint/issues/67
Also wrote on github Ultimaker Cura
with a question about adding such functionality
https://github.com/Ultimaker/Cura/issues/18333
My hope is that this will be implemented properly.