In render views, all surfaces display textures, which are created using image files such as .jpg's. Textures help to create realistic-looking materials and are notably designed so that they will tile across large surfaces without any visible seams.
If you want to import a new material that will be tiled across a surface, as opposed to a stretched across it, make sure that the image file will line up accurately to look realistic for 3D camera views.
To add an image to the Materials library
From the menu, select View> Library Browser to display the Library Browser window, if it is not already open.
Right-click once on the User Catalog folder and select New> Material from the menu that displays.
If you'd like to add a new material to a sub-folder within your User Catalog, right click on the sub-folder of your choice and select New> Material.
On the Texture panel of the Define Material dialog that appears next, click the Browse button next to Texture File.
In the Select Texture File dialog, browse your computer for the image file that you would like to add to the library and click on it to select it, then click the Open button to close the dialog and return to the Define Material dialog.
In the Define Material dialog:
Type a Material Name for your new material.
On the Texture panel, leave the box beside Stretch to Fit unchecked.
On the Pattern panel, make changes to how the material will appear in a vector view.
Select the type of pattern you would like to use under Pattern Source.
Modify the Pattern Specifications to replicate anything you have done within the Texture panel.
Make any other desired changes.
Click OK to close the dialog and add your new material to the library.
Your new material is now saved in your User Catalog and is available for use in any plan.