Format for color 3D model files

#1

I’m trying to upload several files in Multicolor+. I read the texture portion of the Design Guide for multi-color materials. I exported color files from my 3D design program (a Mac-only program called Cheetah3D). I tried several combinations:

  • exporting as a DAE file
  • exporting as an OBJ file, which included an MTL file; I compressed them both into a .zip file
  • combining the DAE and MTL file into a separate .zip file and uploading that

In all these cases, while solid colors are shown in the previews, the custom textures are not. For an extreme case, please see:

https://i.materialise.com/en/3dprint#modelId=c55d49f4-46fe-4969-8918-b926024b3192&materialId=4fb0a954-6d3d-4dee-ba68-0e85762115b5&colourId=42389a45-cde5-4ddb-8c4a-12b24e1c38f3&scale=1&quantity=1

Is this a “real” problem? Or is it just that the preview is not able to show custom textures, but they will be shown in the printed model?