Hi BWTR, Here is the comment I received back from from the Carrara lead engineer: "The elevation shader was a bit obsolete since it’s functionality is covered by the more powerful environment shader. So the elevation shader is still present for compatibility but we have removed it from the menu to simply a bit the user interface. It should not cause any problem with existing shaders." So, no retooling of "old" shaders is required. Regarding hair, yes hair is a last step. Mark