diff --git a/src/pipeline/wowee_building.cpp b/src/pipeline/wowee_building.cpp
index 5204c2fc..5ab672fe 100644
--- a/src/pipeline/wowee_building.cpp
+++ b/src/pipeline/wowee_building.cpp
@@ -56,6 +56,20 @@ WoweeBuilding WoweeBuildingLoader::load(const std::string& basePath) {
 
         grp.vertices.resize(vc);
         f.read(reinterpret_cast<char*>(grp.vertices.data()), vc * sizeof(WoweeBuilding::Vertex));
+        // Sanitize vertex floats — WMO renderer matrix math is sensitive
+        // and a NaN position can desync the entire group's draw state.
+        for (auto& v : grp.vertices) {
+            if (!std::isfinite(v.position.x)) v.position.x = 0.0f;
+            if (!std::isfinite(v.position.y)) v.position.y = 0.0f;
+            if (!std::isfinite(v.position.z)) v.position.z = 0.0f;
+            if (!std::isfinite(v.normal.x)) v.normal.x = 0.0f;
+            if (!std::isfinite(v.normal.y)) v.normal.y = 0.0f;
+            if (!std::isfinite(v.normal.z)) v.normal.z = 1.0f;
+            if (!std::isfinite(v.texCoord.x)) v.texCoord.x = 0.0f;
+            if (!std::isfinite(v.texCoord.y)) v.texCoord.y = 0.0f;
+            for (int c = 0; c < 4; c++)
+                if (!std::isfinite(v.color[c])) v.color[c] = 1.0f;
+        }
         grp.indices.resize(ic);
         f.read(reinterpret_cast<char*>(grp.indices.data()), ic * 4);