Core/Auras: make transform auras honor creature_template trigger flag and choose always invisible models

Closes #19211

(cherry picked from commit 6ba0d489adbe2e93d3c9060944bb4c6f0d3d0259)

1 files changed, 3 insertions, 2 deletions

diff --git a/src/server/game/Spells/Auras/SpellAuraEffects.cpp b/src/server/game/Spells/Auras/SpellAuraEffects.cpp
index 350242760ff..e3de268c89e 100644
--- a/src/server/game/Spells/Auras/SpellAuraEffects.cpp
+++ b/src/server/game/Spells/Auras/SpellAuraEffects.cpp
@@ -1999,8 +1999,9 @@ void AuraEffect::HandleAuraTransform(AuraApplication const* aurApp, uint8 mode,
                 {
                     uint32 model_id = 0;
 
-                    if (uint32 modelid = ci->GetRandomValidModelId())
-                        model_id = modelid;                     // Will use the default model here
+                    // choose a model, based on trigger flag
+                    if (uint32 modelid = sObjectMgr->ChooseDisplayId(ci))
+                        model_id = modelid;
 
                     target->SetDisplayId(model_id);