Why won't my sculpted details bake into a normal map in cycles? I have made a low-poly mesh in cycles, then duplicated it and sculpted more details onto it, and followed a tutorial that I had used before to try to bake the details, but all I got was a blank blue texture. i don't understand what I'm doing wrong. I added the normal map in the objects node editor, the two models are in the same place, and selected to active is checked. Please help! 
Here is the blend file:
Your bake is failing because your low poly mesh is not unwrapped. You need to create a UV map for your low poly mesh so that Blender knows how to map a point on the surface of your 3D mesh onto the 2D texture.