in first my terrain can seethrough I don't know what 's my friend make my project can see terrain seethrough
please look my picture[left is my project now]

in first my terrain can seethrough I don't know what 's my friend make my project can see terrain seethrough
please look my picture[left is my project now]

ok your problem is that the camera is in the hill there so select the camera in the hierarchy and move it till it does not look like its inside the terrain.
hope this help!
If what you mean is "Add transparency" to your terrain as in an Alpha mask or layer, perhaps using one of these shaders will help.
http://www.unifycommunity.com/wiki/index.php?title=Shaders#Terrain
so select the camera in the hierarchy and move it till it does not look like its inside the terrain.** mean about main camera??? I don't think this error come from camera in hierarchy because other unity scene in my come have same problem