Keyshot rendering app is the only software that can produce its native KSP packages, so if you are looking for fbx to ksp conversion of any kind, you have to use this software.
FBX format is popular for data exchange purposes, so naturally it is supported in Keyshot and used to render and visualize content using the software.
Some users may also be searching for import of FBX models to the Kerbal Space Program (also KSP) game, but that is unrelated to this conversion. You can find many tutorials and guides about this on YouTube though.
Updated: October 27, 2023