Texturing a ground

Maya
1

Hello everybody,

Please excuse my english, it is not my native language
I am a new user of Maya, and I have a problem with texturing.
I generated a ground using VUE 9 (PLE version), I exported it in a Wavefront .obj file
and imported in Maya. I'm trying to put a Image file all over the surface to texture it.
It doesn't work, It just change the color in a random way. If I put it on a simple sphere or plane surface, it works fine.
I tried to open the UV editor but the image seems to be in the right place.
I'm not an expert so I hope somebody could help me. I hope that's clear, let me know if you need more details

Thanks in advance

Jean-Baptiste 

2

...but the image seems to be in the right place.

images are always in the right place in UV editor, that not neccessarily means that the UVs also do. Here a screen:

make sure that there IS a wireframe inside your UV Editor that more or less corresponds to your ground mesh, if not check if a proper UV layout exists as additional map (but i doubt it)  "UV Texture Editor -> UV Sets" (as shown at the image)
Otherwise its easy to create a new UV map. Have a look inside the polygon menu, go to "Create UVs" and choose one of the upper options.