Mostly, an existing XcalibuR catalog is available before the 3D data should be created for this catalog. And typically, the choice properties in this catalog, so-called Select Options, provide images for their values.

Using this IG.Creator page, you may import those images from the relevant options, i.g. options that control materials, and create Materials and Textures. This may be useful to start a 3D modelling project and for mockups, but later on the images should be replaced by maps with higher resolution and repeatability. But even then it is useful to call this initially as a lot of formal work (creating a Material, creating a Texture, linking the Texture to the Material, creating a File for the Texture, etc.) can be done very easily.

The options you need to setup are: