problem with displaying materials

[Mipe]

good evening to all, I just started using autocad in 3d, and I found myself more in front of the following problem: in the photo I posted I tried to draw a canopy, everything went well until I went to insert the material. Could someone explain why you see wood like that? thanks to all in advance

 

[Tristan]

Where did you get that material?

 

[Mipe]

from this site here http://www.libreriecad.it/, I downloaded the photo and uploaded it to the material editor, but I realized that even if I design a random parallelepiped you see equally in that way them; instead if I open another drawing sheet the material you see well.

 

[xxfast]

At a glance, it seems like a material mapping problem.