diff --git a/guide/engine/src/index.ts b/guide/engine/src/index.ts
index a5ca4ff6..934e6f3d 100644
--- a/guide/engine/src/index.ts
+++ b/guide/engine/src/index.ts
@@ -9,7 +9,8 @@ export { TurnCycleDiagram, TemperatureGradient, WindBandDiagram, AccumulatorDiag
 export { ClimateSimDisplay } from './components/climate-sim/ClimateSimDisplay'
 export { EventLog } from './components/climate-sim/EventLog'
 export { HexGLRenderer } from './components/climate-sim/HexGLRenderer'
-export { LayerPanel } from './components/climate-sim/LayerPanel'
+export { LayerPanel, ENVIRONMENT_DEFAULT_MASK, LIFE_DEFAULT_MASK } from './components/climate-sim/LayerPanel'
+export type { SimCategory } from './components/climate-sim/LayerPanel'
 export { PlayerBar } from './components/climate-sim/PlayerBar'
 export { ScenarioDescription } from './components/climate-sim/ScenarioDescription'
 export { ScenarioTabs } from './components/climate-sim/ScenarioTabs'