I am trying to make a chain link fence using planes and a .png image as the texture, I am importing the whole environment from blender however this problem keeps on appearing, the plane gets the .png file and you can see through the fence only on one side, if you turn to the other side then the plane disappears completely. However this doesn't happen in blender when I render the image. I have tried importing the .blend file to unity and using an .fbx file however it still appears that way. Any idea on how to fix this problem?
I think you actually mean a quad. A quad consists of 2 triangles, even if blender doesnt show that. A triangle - and with that - a quad, has a normal. Consider it to be the front of the quad. Usually, we dont draw the back of a quad because we don't need to. Rendering is roughly twice as fast when we dont draw the triangles that face the other way, and you usually dont see that we cull them, because they're normally occluded by other triangles. In this case, it is a little more difficult. We need to duplicate the quad, and make the copy face the other way. In blender, select your quad (or plane, if you want to keep calling it that). Shift-d to duplicate the vertices. Just move it slightly away to the side that you cant see in the other program. Press w. Click flip normals. Save and export. Im not sure if this is what the problem is but it sounds like it.