Export noise textures as image I have made a sphere with multiple levels of noise to create a unique map.
What is the best way to then export this as a flat image to edit in photoshop. The goal is to further create height, texture and colour. Then bring back in to Blender and apply the changes to the sphere.
Create a default plane (2x2 BU), assign your material; in object mode, material tab, click on the number near the material name to create a copy of it, delete the diffuse shader and put an emission shader instead, take the displacer input and put it on the color input; select the camera, Alt G, Alt R, to reset its trasform values, move it up in z axis a little, set it to orthographic mode, orthographic scale 2 and 2048 x 2048 dimension (or whatever you need). 

F12 with no lights.