fix(parsing): correct UPDATE_OBJECT PackedGuid, cape textures, and missing asset guards

- Fix MOVEMENT update type to use readPackedGuid() instead of readUInt64() (WotLK 3.3.5a)
- Add desync diagnostic logging to UPDATE_OBJECT parser for future debugging
- Register MSG_MOVE_SET_COLLISION_HGT (0x518) as skip handler
- Fix cape texture lookup to only try .blp extension variants (4 files)
- Add fileExists() guards for underwear textures referencing missing BLP files (4 files)
- Add spell visual impact→cast M2 path fallback
- Skip WMO doodad instance creation when model load fails
- Demote spell caster position warning to debug level

src/rendering/character_preview.cpp

@@ -443,11 +443,11 @@ bool CharacterPreview::loadCharacter(game::Race race, game::Gender gender,
                      variationIndex == 0 && colorIndex == static_cast<uint32_t>(skin)) {
                 for (uint32_t f = csF.texture1; f <= csF.texture1 + 2; f++) {
                     std::string tex = charSectionsDbc->getString(r, f);
-                    if (!tex.empty()) {
+                    if (!tex.empty() && assetManager_->fileExists(tex)) {
                         underwearPaths.push_back(tex);
                     }
                 }
-                foundUnderwear = true;
+                foundUnderwear = !underwearPaths.empty();
             }
         }
 
@@ -824,14 +824,15 @@ bool CharacterPreview::applyEquipment(const std::vector<game::EquipmentItem>& eq
                     bool hasDir = (name.find('\\') != std::string::npos);
                     bool hasExt = hasBlpExt(name);
                     if (hasDir) {
-                        addCandidate(name);
-                        if (!hasExt) addCandidate(name + ".blp");
+                        if (hasExt) addCandidate(name);
+                        else addCandidate(name + ".blp");
                     } else {
                         std::string baseObj = "Item\\ObjectComponents\\Cape\\" + name;
                         std::string baseTex = "Item\\TextureComponents\\Cape\\" + name;
-                        addCandidate(baseObj);
-                        addCandidate(baseTex);
-                        if (!hasExt) {
+                        if (hasExt) {
+                            addCandidate(baseObj);
+                            addCandidate(baseTex);
+                        } else {
                             addCandidate(baseObj + ".blp");
                             addCandidate(baseTex + ".blp");
                         }

src/rendering/spell_visual_system.cpp

@@ -370,12 +370,15 @@ void SpellVisualSystem::playSpellVisual(uint32_t visualId, const glm::vec3& worl
 
     if (!spellVisualDbcLoaded_) loadSpellVisualDbc();
 
-    // Select cast or impact path map
-    auto& pathMap = useImpactKit ? spellVisualImpactPath_ : spellVisualCastPath_;
-    auto pathIt = pathMap.find(visualId);
-    if (pathIt == pathMap.end()) {
-        LOG_WARNING("SpellVisual: no ", (useImpactKit ? "impact" : "cast"), " path for visualId=", visualId);
-        return;
+    // Select cast or impact path map; fall back to the other if missing
+    auto& primaryMap = useImpactKit ? spellVisualImpactPath_ : spellVisualCastPath_;
+    auto& fallbackMap = useImpactKit ? spellVisualCastPath_ : spellVisualImpactPath_;
+    auto pathIt = primaryMap.find(visualId);
+    if (pathIt == primaryMap.end()) {
+        pathIt = fallbackMap.find(visualId);
+        if (pathIt == fallbackMap.end()) {
+            return;
+        }
     }
 
     const std::string& modelPath = pathIt->second;

src/rendering/terrain_manager.cpp

@@ -1055,7 +1055,12 @@ bool TerrainManager::advanceFinalization(FinalizingTile& ft) {
             size_t uploaded = 0;
             while (ft.wmoDoodadIndex < pending->wmoDoodads.size() && uploaded < kDoodadsPerStep) {
                 auto& doodad = pending->wmoDoodads[ft.wmoDoodadIndex];
-                if (m2Renderer->loadModel(doodad.model, doodad.modelId)) {
+                if (!m2Renderer->loadModel(doodad.model, doodad.modelId)) {
+                    ft.wmoDoodadIndex++;
+                    uploaded++;
+                    continue;
+                }
+                {
                     std::lock_guard<std::mutex> lock(uploadedM2IdsMutex_);
                     uploadedM2Ids_.insert(doodad.modelId);
                 }