Getting the look you want may require some experimentation, but making the "ground out of ice" is at its simplest level just a matter of applying your "ice" shader(s) to the entire terrain with full coverage, i.e. no breakup or masking. There's no real trick to it, beyond picking colors, displacement, and shaders that look like ice. The translucency option in the Default Shader can help fake the translucency of real ice, as an example. But unless you want really shiny, transparent ice (in which case you might try the Water shader), it's really more about color than anything.
- Oshyan
