I tried for hours every combination for the collada exporter of VoxelShop (1.8.19/Linux) to import it in Godot (3.0.2/Linux) I know that it works (did it a few months ago, but can't remember if it was unity or godot I imported in)
What do I have to tick in the VoxelShop Collada Export?
In Godot basically create a new MeshInstance and attach the texture to the albedo of a SpatialMaterial or did I understand something wrong?
In VoxelShop there are these options:
Algorithm: Optimal (Poly2Tri) / Low Poly (Rectangular)
Export textured Voxels
Triangulate by color
Use Vertex Coloring
Use overlapping UVs
Use skewed UVs
Use Texture Padding
Use Power of Two textures
Set Y instead of Z as up axis
Export orthogonal Vertex Normals