I have just started using Blender a few weeks ago and I have been doing ok with it until recently when I changed some setting and now I can't get displacement to work on image textures.
Before I could use displacement images on bricks for example to get nice 3d textures with each brick raised out of the surface. But now when I add an image in the node editor with a displacement image and hook it up and add subdivision surface modifier and displacement modifier I can't get the nice 3d effect. Changing the strength or midlevel just seems to change the x and y displacement. Please help. I've attached an image of my workspace. Also I would like to know if it's possible to get displacement effects not just on each brick but also on the contours and ridges within an individual brick?