I'm running r25 on Mac, but this happens in any version. I purchased a model and find the C4D scene is using V-Ray. I don't have that engine as I use Corona. They have a scene converter, but you have to own both. So, there is an FBX option. I open that scene and, as you can imagine, all the texture filepaths are broken. Not a problem when you have the Project Assets Inspector. Select all, Relink Assets and pick the folder where all the texture files live. Boom All items now show checkmarks instead of red Xs. But..... all the texture still appear as missing.
As you can see in this image, I went a step further on the first one, and directly replaced it with the correct file. At the bottom, there is the correct thumbnail. If you look to the right in the material attributes, there is a black preview and as you can see, the author's original filepath is still there. You can even see the one in the middle show a mix of new and old paths.
Some of the paths appear different in the main list as I have been experimenting with relative, absolute paths and the like. What I am trying to do here, is relink these standard C4D materials, then use the Corona Scene Converter tool, to make them all Corona Physical materials and at least get me close. In most cases with this city scene, many will be view from a distance so detailed adjustments won't be necessary. I'm at a loss. I even saved the .c4d file inside the "tex" folder to no avail.
How can I fix this? There are around 375 materials in this scene. It would take forever to do manually. Any ideas are welcome.