Parallax Specular shaders iOS

Hey, all,

I've been trying to get Parallax Specular shaders to work on iOS, but with no luck. Is it the case that these shaders still don't work on iOS, despite the fact that newer hardware setups would probably support them?

If it is the case that they don't work, does anyone know of any shaders which do work and give a similar effect?

Thanks!

SB