I’ve searched on on google and found a way… it says to go to the texture face panel and press two sided I already did that but… just look at the picture below:
Does it appear on one side after you hit F12 (render) ?
I make a quick sphere with a cloud texture and got it on both sides. I don’t think that Blender will show you the texture in the 3D window; you must render it.
By default it’s set to 1 side. By flipping the normal (select face(s) and press W -> ‘Flip normals’) you can change the visible side of the face.
it says to go to the texture face panel and press two sided I already did
That would only make the active face two-sided (as seen in your example).
So when you select everything with A, and press ‘two-side’ (which only makes the active face two-sided), press Ctrl+C and choose ‘Copy Mode’ (‘Active Mode’ in 2.49). All faces will become two-sided.
For Ctrl+C to work on 2.5 you need to enable the Add-On ‘Copy Attributes Menu’ first.