How to import material for the object?

I wanna add material for my object.

But there are limited materials.

How should I import more on it and where I can find the material sources ?

when you open the material editor, on the right side you have the model materials you can create a new one with the plus symbol then unfold textures unfold color click on map file choose and import any kind of jpg or png you like, didnt find any other formats that work. you can add them to your library by drag and dropping them over to the left side, but i never used that since i do only very basic textures in rhino. i am sure you can find a lot of free textures online that work, or create some yourself.

thanks Richardz. I know what to do now