Name all env symbols

src/include/commands.h

@@ -2218,7 +2218,7 @@
 /**
  * Switch to the stage's alternative sky/fog settings. The switch is instant.
  *
- * The stage must use a type 1 sky (in the g_EnvironmentsType1 table) and the
+ * The stage must use a type 1 sky (in the g_FogEnvironments table) and the
  * alternative sky must be placed immediately after it.
  */
 #define switch_to_alt_sky \