hi all, yes its possible but the result is not very clean. I found a file made by zelouille in a blenderclan thread name “parallax mapping with offset limiting” with node, the shader is a bit complex but work very well in glsl mode since 2.5, because you can apply a normalmap as input materialnode.
I modified the file for having a silhouette clipping, and adapt them for cycles but i’ve got a problem with my tangent object in viewspace.if you want more information type "parallax node blender " in google image search, i think the first and second image will interest you.
ps: sorry for my english.
