First pic is a model object. Placeholder textures are correct. 2nd pic it the object imported into a model. Note the black tiles, and upper rectangle display incorrectly.
Hello - as always, it is generally hard or impossible to figure out buggy behavior unless you provide the steps to reproduce the problem, and/or a an example file. You can post here, or send to tech@mcneel.com along with a link back here in your comments.
-Pascal
This just started in this model. I deleted parts, then just undid the delete, and it stopped. In other words, the model is back to what it was, but now the problem has stopped. It has occurred before, and might return. The full model file is not really email-able at 62mb. Is there a McNeel upload link should it return?
Hello - Use www.rhino3d.com/upload - please include a link back here in your comments.
-Pascal