If there is no error message when uploading the Skp model, but the materials are missing in the preview and the model appears to be white color then you need to modify it.
Reason: the faces of the Skp model are flipped. Only front face of the obj will be shown after uploading the model, the flipped front faces without textures will be in white color.
- Check the material setting in the SU model;
- click 【Monochrome】-The white parts are the front faces while blue-gray parts are the reversed ones.
3. Double click to enter the model group (make sure you enter the bottom group), select the bule-grey componets, right click-【reverse faces】.
4. After reversing the plane, all the components are show in white color, then click the texture mapping to re-add the material to the model, save and upload.