I like the Voxel Engine but I have more expensive with 3d tile sets.
Matching the UVs with the faces and rotating the tiles are probably important features.
I feel like just editing the Voxel editor with these features would save a lot of time there’s already a grid.
Here’s a simple way how to add a tileset using Blender and Godot.
(I just like how easy the 3d collision Works for Godot.) https://youtu.be/VjuyfBaryu8?