Rotating a single image texture for multiple instances I have a node setup for a single image texture (actually its a set of images) tiled floor. For variance I grouped the spec, normal, occ images then rotated them randomly using the Object Info. The end result looks pretty good, but it I dont think the node setup is very efficient. If I want to change the image, I need to go into each group and manually change 4 images for the 4 different rotated tiles. Is there a way to change the rotation of an image AFTER the using the image texture node to make changing an image quicker?

I've checked out a similar post here, but this is different because I want to rotate the same image, not replace it with a rotated image.
No, it's currently not possible. To "rotate" a texture, you actually rotate it's mapping, so it must be done before hand.