Texture does not change


I want to edit the data created using photogrammetry with Rhinoceros and then import it into Cinema 4D.

I want to export the texture in this data for that, but I can’t find it.

Textures are displayed on the Rhinoceros screen, but when you export materials and textures, they become pure white object data on Cinema 4D.

How can I export texture data and material data?