add backface color to material struct

Author: benjamaan476

modeling-cmds/src/def_enum.rs

@@ -802,6 +802,8 @@ define_modeling_cmd_enum! {
             pub roughness: f32,
             /// Ambient Occlusion of the new material
             pub ambient_occlusion: f32,
+            /// Color of the backface
+            pub backface_color: Option<Color>,
         }
         /// What type of entity is this?
         #[derive(Debug, Clone, PartialEq, Serialize, Deserialize, JsonSchema, ModelingCmdVariant)]

modeling-session/examples/cube_png.rs

@@ -21,8 +21,8 @@ const CUBE_WIDTH: LengthUnit = LengthUnit(100.0);
 async fn main() -> Result<()> {
     // Set up the API client.
     let token = env::var("ZOO_API_TOKEN")
-    .or_else(|_| env::var("KITTYCAD_API_TOKEN")) // legacy name
-    .context("You must set $ZOO_API_TOKEN")?;
+        .or_else(|_| env::var("KITTYCAD_API_TOKEN")) // legacy name
+        .context("You must set $ZOO_API_TOKEN")?;
     let client = kittycad::Client::new(token);
 
     // Where should the final PNG be saved?