Fix T94874: Drivers using bone custom properties don't work on modifiers

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
index fcdc3fe58e8..38e46ca95c6 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
@@ -1746,6 +1746,11 @@ void DepsgraphRelationBuilder::build_driver_id_property(ID *id, const char *rna_
     const bPoseChannel *pchan = static_cast<const bPoseChannel *>(ptr.data);
     id_property_key = OperationKey(
         id, NodeType::BONE, pchan->name, OperationCode::ID_PROPERTY, prop_identifier);
+    /* Create relation from the parameters component so that tagging armature for parameters update
+     * properly propagates updates to all properties on bones and deeper (if needed). */
+    OperationKey parameters_init_key(id, NodeType::PARAMETERS, OperationCode::PARAMETERS_ENTRY);
+    add_relation(
+        parameters_init_key, id_property_key, "Init -> ID Property", RELATION_CHECK_BEFORE_ADD);
   }
   else {
     id_property_key = OperationKey(