Z-fighting is the flashing seen when two or more coplanar faces are overlapping.
Your model will not be accepted for the following reason:
Your model contains z-fighting. Z-fighting is visually disruptive and is not acceptable for the Photorealistic 3D Buildings layer in Google Earth.
If your model does not adhere to the above acceptance criteria, you will be notified of the following problem: 
Z-fighting.
Refer to the following to ensure your model is accepted:
- Building Maker:
- Z-fighting should not occur with Building Maker models. If you have a Building Maker model that is rejected for z-fighting, please use the Tell us why we’re wrong link at the bottom of the model details page in the 3D Warehouse.
- SketchUp:
- When importing textures to SketchUp, please ensure that the Use as texture option is selected.
- If your model is z-fighting with an image, right-click on the image and click Explode. Please note that you may need to re-apply the texture once the image has been exploded.
- If two faces are z-fighting, click on one of the faces and press the Delete key on your keyboard.
- Z-fighting can also occur in Google Earth if two faces are close to each other even if they are not coplanar. Make sure that if you have two faces that are parallel to one another that they are more than 6 inches (~15 centimeters) apart or they might cause z-fighting once they are added to the Photorealistic 3D Buildings layer in Google Earth.
- Z-fighting may not always show up in a SketchUp model, but can be present once it is converted to .kmz format. Please always check your model in Google Earth prior to submitting it for consideration in the Photorealistic 3D Buildings layer in Google Earth.
- For help editing and fixing problems with a SketchUp model that is already uploaded to the 3D Warehouse, see: Editing a SketchUp model in the 3D Warehouse.