OBJ export errors

[renem1]

I’m using the OBJ-Exporter of Sketchup Make 2017 for the following object: Twin Islands | 3D Warehouse

The MTL-File is fine (texture paths correct and no spaces in any names or paths) but when viewing the OBJ-File there are multiple faces appearing white when they should have texture data on them.

This is a link to the OBJ data I exported: OBJ.zip - Google Drive

[McGordon]

I’ve only had a quick look at the skp file, but there are lots of reversed faces on the buildings. All the blueish ones are reversed here:

This is probably what’s messing up the textures. Try reversing them manually and try again.

[DaveR]

You don’t suppose it has anything to do with the plethora of reversed faces in the model, do you?

[TIG]

All of the faces are almost certainly being correctly ‘textured’, however back-faces’ materials are generally ignored by exporters and apps opening files like your.
If you reverse the faces, so that you no longer see their backs, applying fresh materials as necessary to the now visible faces, then these should export as you hope.

It is doing exporting and displaying it correctly - but sadly you have modeled it incorrectly, and need to do more work to fix things…

[renem1]

All of the 3 answers seem to be right about the problem. The original file isn’t mine though but I’m gonna try and see if I can fix these problems.

[DaveR]

It’s unfortunate that authors of models like this can’t be bothered to orient faces correctly before texturing. A good lesson though for your own models. Stay on top of correct face orientation and fix them before you apply textures. It’ll save you or someone else unnecessary work later.