The PartTools package is a set of utilities provided by Squad to be used by modders to:- Create their own 3D models and parts in KSP. Create KSPedia pages for their mods. Create Internal 3D models for their parts in KSP. PartTools also includes the coloranimation tool and the KSPAssetCompiler tool (for compiling asset bundles). PartTools have been updated and re-compiled for Unity 2019.4.18f1 for KSP 1.12+ to include all of these tools in one unity asset bundle.