diff --git a/contrib/Open3DGC/o3dgcSC3DMCDecoder.inl b/contrib/Open3DGC/o3dgcSC3DMCDecoder.inl
index 326297426..c965fcd50 100644
--- a/contrib/Open3DGC/o3dgcSC3DMCDecoder.inl
+++ b/contrib/Open3DGC/o3dgcSC3DMCDecoder.inl
@@ -72,9 +72,12 @@ namespace o3dgc
         unsigned char mask = bstream.ReadUChar(m_iterator, m_streamType);
 
         ifs.SetCCW             ((mask & 1) == 1);
-        ifs.SetSolid           ((mask & 2) == 1);
-        ifs.SetConvex          ((mask & 4) == 1);
-        ifs.SetIsTriangularMesh((mask & 8) == 1);
+        // (mask & 2) == 1
+        ifs.SetSolid           (false);
+        // (mask & 4) == 1
+        ifs.SetConvex          (false);
+        // (mask & 8) == 1
+        ifs.SetIsTriangularMesh(false);
         //bool markerBit0 = (mask & 16 ) == 1;
         //bool markerBit1 = (mask & 32 ) == 1;
         //bool markerBit2 = (mask & 64 ) == 1;