This ice shader uses a multi-layer system with a parallax effect to create the artificial sense of depth on 2D geometry.
3 out of 4 albedo layers are affected by parallax depth effects.
There is 2 of each material attribute, for near and far. All far attributes can be disabled to save computing cost, but it allows for the material to change color etc. from distance.
All layers can be recolored, meaning that this material can easily be re-used for other effects in combination with different textures.
Disclaimer: I only made the shader. I did not make the textures.