Blender to unreal engine Here's my video made with blender and unreal engine:
https://www.youtube.com/watch?v=QPkYeqT0Jyg

https://www.youtube.com/watch?v=HG3--iTjPq0

I have a problem with plane meshes and I don't know weather it has something to do with Unreal engine or Blender. I need double sided lighting that plane would be displayed on both sides. And even if I select double sided in Unreal engine I still have transparent walls, floors and ceiling so I have to use solid shapes which takes much more time in building lighting and baking maps. For example I model a flower and I don't want to use solidify modifier but then when I export it to Unreal engine and I can't find backface culling option there and I can only see one side of leaf.  [the tree is taken from another unreal project and i have no idea how they made it.]
This is a problem with the normals. Game engines will always display on only the side where the normals are pointing out. As far as I know, Blender does not allow  double sided normals, so make two planes, one for each side.