A quick and dirty Unity app for getting 3D models into Minecraft. The 3D model has to be an OBJ file shouldn't be too complex.
Output is a datapack containing one function:
/function modeltominecraft/buildmodel
When this function is called in Minecraft the model is built.
This app is using Mesh-Voxelization by Scrawk and UnityStandaloneFileBrowser by gkngkc.