diff --git a/src/mol-geo/geometry/geometry.ts b/src/mol-geo/geometry/geometry.ts
index 257d706e0cb9f1e926a97ea1f30258e4e223a513..2ef0ad3d5f6f1713eb0059df2eb6c10004abbfcd 100644
--- a/src/mol-geo/geometry/geometry.ts
+++ b/src/mol-geo/geometry/geometry.ts
@@ -99,7 +99,7 @@ export namespace Geometry {
             opaque: props.alpha === 1
         }
     }
-    
+
     export function updateRenderableState(state: RenderableState, props: PD.Values<Params>) {
         state.opaque = props.alpha === 1
     }
diff --git a/src/mol-geo/geometry/mesh/mesh.ts b/src/mol-geo/geometry/mesh/mesh.ts
index 5a30e6a5528b0ab96eb8a3e770e9e6c244e2093e..f6381256b11423d73cd42726c6d4819e6258185f 100644
--- a/src/mol-geo/geometry/mesh/mesh.ts
+++ b/src/mol-geo/geometry/mesh/mesh.ts
@@ -343,7 +343,7 @@ export namespace Mesh {
 
     export const Params = {
         ...Geometry.Params,
-        doubleSided: PD.Boolean(true),
+        doubleSided: PD.Boolean(false),
         flipSided: PD.Boolean(false),
         flatShaded: PD.Boolean(false),
     }