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;
diff --git a/test/unit/utMatrix3x3.cpp b/test/unit/utMatrix3x3.cpp
index 50fa66c50..3905b1d35 100644
--- a/test/unit/utMatrix3x3.cpp
+++ b/test/unit/utMatrix3x3.cpp
@@ -73,9 +73,21 @@ TEST_F(utMatrix3x3Test, FromToMatrixTest) {
 
     aiVector3D from, to;
 
+    auto random_ratio = []() -> float {
+        return static_cast<float>(rand()) / static_cast<float>(RAND_MAX);
+    };
+
     for (int i = 0; i < NUM_SAMPLES; ++i) {
-        from = aiVector3D(1.f * rand() / RAND_MAX, 1.f * rand() / RAND_MAX, 1.f * rand() / RAND_MAX).Normalize();
-        to = aiVector3D(1.f * rand() / RAND_MAX, 1.f * rand() / RAND_MAX, 1.f * rand() / RAND_MAX).Normalize();
+        from = aiVector3D(
+                1.f * random_ratio(),
+                1.f * random_ratio(),
+                1.f * random_ratio())
+                       .Normalize();
+        to = aiVector3D(
+                1.f * random_ratio(),
+                1.f * random_ratio(),
+                1.f * random_ratio())
+                     .Normalize();
 
         aiMatrix3x3::FromToMatrix(from, to, trafo);
         res = trafo * from;