diff --git a/src/layer/geometry/PointLayer.js b/src/layer/geometry/PointLayer.js
index 5413459..012829d 100644
--- a/src/layer/geometry/PointLayer.js
+++ b/src/layer/geometry/PointLayer.js
@@ -14,6 +14,14 @@
 
 // TODO: Provide option to billboard geometry so it always faces the camera
 
+// TODO: Support dynamic updating / hiding / animation of geometry
+//
+// This could be pretty hard as it's all packed away within BufferGeometry and
+// may even be merged by another layer (eg. GeoJSONLayer)
+//
+// How much control should this layer support? Perhaps a different or custom
+// layer would be better suited for animation, for example.
+
 import Layer from '../Layer';
 import extend from 'lodash.assign';
 import THREE from 'three';
diff --git a/src/layer/geometry/PolygonLayer.js b/src/layer/geometry/PolygonLayer.js
index b6c95ae..06d8af6 100644
--- a/src/layer/geometry/PolygonLayer.js
+++ b/src/layer/geometry/PolygonLayer.js
@@ -3,6 +3,14 @@
 // TODO: Look at ways to drop unneeded references to array buffers, etc to
 // reduce memory footprint
 
+// TODO: Support dynamic updating / hiding / animation of geometry
+//
+// This could be pretty hard as it's all packed away within BufferGeometry and
+// may even be merged by another layer (eg. GeoJSONLayer)
+//
+// How much control should this layer support? Perhaps a different or custom
+// layer would be better suited for animation, for example.
+
 import Layer from '../Layer';
 import extend from 'lodash.assign';
 import THREE from 'three';
diff --git a/src/layer/geometry/PolylineLayer.js b/src/layer/geometry/PolylineLayer.js
index abbcf2b..9a9a63b 100644
--- a/src/layer/geometry/PolylineLayer.js
+++ b/src/layer/geometry/PolylineLayer.js
@@ -5,6 +5,14 @@
 
 // TODO: Provide alternative output using tubes and splines / curves
 
+// TODO: Support dynamic updating / hiding / animation of geometry
+//
+// This could be pretty hard as it's all packed away within BufferGeometry and
+// may even be merged by another layer (eg. GeoJSONLayer)
+//
+// How much control should this layer support? Perhaps a different or custom
+// layer would be better suited for animation, for example.
+
 import Layer from '../Layer';
 import extend from 'lodash.assign';
 import THREE from 'three';