diff --git a/thermion_dart/lib/thermion_dart/viewer/shared_types/camera.dart b/thermion_dart/lib/thermion_dart/viewer/shared_types/camera.dart
new file mode 100644
index 00000000..5854c732
--- /dev/null
+++ b/thermion_dart/lib/thermion_dart/viewer/shared_types/camera.dart
@@ -0,0 +1,6 @@
+// abstract class Camera {
+//   Future setProjectionMatrixWithCulling(Matrix4 projectionMatrix, Matrix4 projectionMatrixForCUlling);
+//   Future setDepthCullingEnabled(bool enabled);
+// }
+
+enum AlphaMode { OPAQUE, MASK, BLEND }