Hi,
I have a 1920*1080 texture and i want to apply this texture on a 2d mesh to create my background.
I create my 2D plane on 3dsmax( with the same size that my texture) but when i apply the texture on UE4 it is very small.
Your 3DSMax export might not have included UV-coordinates
You did not setup any UV-coordinates before exporting the mesh to FBX
There are UV-coordinates, but they are set up something like 1 full unit per centimeter or something, resulting in that massive number of really small tiles you are seeing.
Case 3 can be fixed in UE4 by adding a TexCoord node to the UVs input of the Texture Sample node:
Then you would set the UTiling and VTiling to some really small value until you get a match. I bet that UTiling at 0.00052 and VTiling at 0.00092 gets you a good result.
For case 1 and 2 you just have to check your 3DSMax documentation on how to create UVs.