Spec value coming from alpha channel?
doing some texturing for the first time in ages, and have just created a spec map. when I apply it to my material, the spec value is coming from the alpha channel, not the main image (I can tell because I've got a uv layout in the alpha channel that that is now creating a spec highlight). In the hypershade, the connections does say alpha (as it always does for bump spec etc) but I don't think this should be happening.
any ideas or suggestions?