Cannot get some parts of a model to display texture

Having issues getting a texture to display detail on two segments of a model. I have rebuilt the model and re-uploaded many times but with the same result. The texture is displaying a monotone instead of the detail in two locations. In the attached pics you can see two walls. The one on the right displays a detailed plaster texture but the left is monotone and I want to same texture as on the right. . Any ideas? Happy to share my model

Any help will be greatly appreciated

Also cannot get the mortar to display anything but monotone

Those materials have no UV mapping, so the texture will not work:


Something probably needs to be adjusted before exporting.

I highly recommend reading these two articles about uploading from SketchUp: