Fix T85963: Combine and separate XYZ nodes don't work on instances

They were missing the `geometry_set_realize_instances` function used to
make any input instances real for writing.

2 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_attribute_combine_xyz.cc b/source/blender/nodes/geometry/nodes/node_geo_attribute_combine_xyz.cc
index 564668af274..9c5c7e270b1 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_attribute_combine_xyz.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_attribute_combine_xyz.cc
@@ -121,6 +121,8 @@ static void geo_node_attribute_combine_xyz_exec(GeoNodeExecParams params)
 {
   GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
 
+  geometry_set = geometry_set_realize_instances(geometry_set);
+
   if (geometry_set.has<MeshComponent>()) {
     combine_attributes(geometry_set.get_component_for_write<MeshComponent>(), params);
   }
diff --git a/source/blender/nodes/geometry/nodes/node_geo_attribute_separate_xyz.cc b/source/blender/nodes/geometry/nodes/node_geo_attribute_separate_xyz.cc
index 0ba89562ec1..55b933e8582 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_attribute_separate_xyz.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_attribute_separate_xyz.cc
@@ -147,6 +147,8 @@ static void geo_node_attribute_separate_xyz_exec(GeoNodeExecParams params)
 {
   GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
 
+  geometry_set = geometry_set_realize_instances(geometry_set);
+
   if (geometry_set.has<MeshComponent>()) {
     separate_attribute(geometry_set.get_component_for_write<MeshComponent>(), params);
   }