diff --git a/libraries/entities/src/EntityItemProperties.cpp b/libraries/entities/src/EntityItemProperties.cpp
index 1ef4728c0d..d348101b66 100644
--- a/libraries/entities/src/EntityItemProperties.cpp
+++ b/libraries/entities/src/EntityItemProperties.cpp
@@ -471,6 +471,9 @@ EntityPropertyFlags EntityItemProperties::getChangedProperties() const {
  * @property {boolean} locked=false - Whether or not the entity can be edited or deleted. If <code>true</code> then the 
  *     entity's properties other than <code>locked</code> cannot be changed, and the entity cannot be deleted.
  * @property {boolean} visible=true - Whether or not the entity is rendered. If <code>true</code> then the entity is rendered.
+ * @property {boolean} canCastShadows=true - Whether or not the entity casts shadows. Currently applicable only to 
+ *     {@link Entities.EntityType|Model} and {@link Entities.EntityType|Shape} entities. Shadows are cast if inside a 
+ *     {@link Entities.EntityType|Zone} entity with <code>castShadows</code> enabled in its {@link Entities.EntityProperties-Zone|keyLight} property.
  *
  * @property {Vec3} position=0,0,0 - The position of the entity.
  * @property {Quat} rotation=0,0,0,1 - The orientation of the entity with respect to world coordinates.
@@ -1189,7 +1192,7 @@ QScriptValue EntityItemProperties::copyToScriptValue(QScriptEngine* engine, bool
     COPY_PROPERTY_TO_QSCRIPTVALUE(PROP_ANGULAR_VELOCITY, angularVelocity);
     COPY_PROPERTY_TO_QSCRIPTVALUE(PROP_ANGULAR_DAMPING, angularDamping);
     COPY_PROPERTY_TO_QSCRIPTVALUE(PROP_VISIBLE, visible);
-    COPY_PROPERTY_TO_QSCRIPTVALUE(PROP_CAN_CAST_SHADOW, canCastShadow);
+    COPY_PROPERTY_TO_QSCRIPTVALUE(PROP_CAN_CAST_SHADOW, canCastShadow);  // Relevant to Shape and Model entities only.
     COPY_PROPERTY_TO_QSCRIPTVALUE(PROP_COLLISIONLESS, collisionless);
     COPY_PROXY_PROPERTY_TO_QSCRIPTVALUE_GETTER(PROP_COLLISIONLESS, collisionless, ignoreForCollisions, getCollisionless()); // legacy support
     COPY_PROPERTY_TO_QSCRIPTVALUE(PROP_COLLISION_MASK, collisionMask);
diff --git a/libraries/entities/src/KeyLightPropertyGroup.h b/libraries/entities/src/KeyLightPropertyGroup.h
index 007e8b2005..2be33787de 100644
--- a/libraries/entities/src/KeyLightPropertyGroup.h
+++ b/libraries/entities/src/KeyLightPropertyGroup.h
@@ -33,6 +33,9 @@ class ReadBitstreamToTreeParams;
  * @property {Color} color=255,255,255 - The color of the light.
  * @property {number} intensity=1 - The intensity of the light.
  * @property {Vec3} direction=0,-1,0 - The direction the light is shining.
+ * @property {boolean} castShadows=false - If <code>true</code> then shadows are cast. Shadows are cast by avatars, plus 
+ *     {@link Entities.EntityType|Model} and {@link Entities.EntityType|Shape} entities that have their 
+ *     <code>{@link Entities.EntityProperties|canCastShadows}</code> property set to <code>true</code>.
  */
 class KeyLightPropertyGroup : public PropertyGroup {
 public: