diff --git a/src/3d/shaders/pointcloud.frag b/src/3d/shaders/pointcloud.frag
index 90e15e08d97a..495c66f5c76e 100644
--- a/src/3d/shaders/pointcloud.frag
+++ b/src/3d/shaders/pointcloud.frag
@@ -83,7 +83,7 @@ vec4 exactColorRamp()
     if ( abs( parameter - value ) < 0.01 )
       return vec4( color, 1.0f );
   }
-  return vec4(0.0, 0.0, 0.0, 0.0f);
+  return vec4(0.0, 0.0, 0.0, 1.0f);
 }
 
 vec4 colorRamp()
@@ -91,7 +91,7 @@ vec4 colorRamp()
   if (u_colorRampCount<=0)
     return vec4(0.0,0.0,0.0,1);
 
-  vec4 colorRampResult = vec4(0.0f, 0.0f, 0.0f, 0.0f);
+  vec4 colorRampResult = vec4(0.0f, 0.0f, 0.0f, 1.0f);
   switch (u_colorRampType)
   {
   case 0:
@@ -113,7 +113,7 @@ void main(void)
   switch (u_renderingStyle)
   {
   case 0: //  no rendering
-    color = vec4(0.0f, 0.0f, 0.0f, 0.0f);
+    color = vec4(0.0f, 0.0f, 0.0f, 1.0f);
     break;
   case 1: // single color
     color = vec4(u_singleColor, 1.0f);
diff --git a/src/3d/symbols/qgspointcloud3dsymbol_p.cpp b/src/3d/symbols/qgspointcloud3dsymbol_p.cpp
index 92f8fb95a43d..20390451423f 100644
--- a/src/3d/symbols/qgspointcloud3dsymbol_p.cpp
+++ b/src/3d/symbols/qgspointcloud3dsymbol_p.cpp
@@ -301,7 +301,7 @@ bool QgsColorRampPointCloud3DSymbolHandler::prepare( const QgsPointCloud3DRender
 void QgsColorRampPointCloud3DSymbolHandler::processNode( QgsPointCloudIndex *pc, const IndexedPointCloudNode &n, const QgsPointCloud3DRenderContext &context )
 {
   QgsPointCloudAttributeCollection attributes;
-  constexpr int xOffset = 0;
+  const int xOffset = 0;
   attributes.push_back( QgsPointCloudAttribute( QStringLiteral( "X" ), QgsPointCloudAttribute::Int32 ) );
   const int yOffset = attributes.pointRecordSize();
   attributes.push_back( QgsPointCloudAttribute( QStringLiteral( "Y" ), QgsPointCloudAttribute::Int32 ) );
@@ -536,7 +536,7 @@ bool QgsClassificationPointCloud3DSymbolHandler::prepare( const QgsPointCloud3DR
 void QgsClassificationPointCloud3DSymbolHandler::processNode( QgsPointCloudIndex *pc, const IndexedPointCloudNode &n, const QgsPointCloud3DRenderContext &context )
 {
   QgsPointCloudAttributeCollection attributes;
-  constexpr int xOffset = 0;
+  const int xOffset = 0;
   attributes.push_back( QgsPointCloudAttribute( QStringLiteral( "X" ), QgsPointCloudAttribute::Int32 ) );
   const int yOffset = attributes.pointRecordSize();
   attributes.push_back( QgsPointCloudAttribute( QStringLiteral( "Y" ), QgsPointCloudAttribute::Int32 ) );