I have been following Kent Trammel's YouTube tutorial series on creating a realistic head within Blender without many obstacles. In part 3 (https://www.youtube.com/watch?v=KoiYMx2xXGA&t=27s) he bakes a displacement map from his multires mesh (seen at 5:42). However, when I attempt this I am greeted by "You should have an active texture to use multires baker". This issue has been raised before with various solutions (https://blenderartists.org/forum/showthread.php?319591-Multires-Baker-You-should-have-active-texture , How to pick target texture image for baking?) yet after trying each one I get the same message.
I have been trying to fix this for hours now, so any solution would be greatly appreciated.