diff --git a/LSLib/Granny/Model/GLTFExporter.cs b/LSLib/Granny/Model/GLTFExporter.cs
index ddd73502..e1276cdd 100644
--- a/LSLib/Granny/Model/GLTFExporter.cs
+++ b/LSLib/Granny/Model/GLTFExporter.cs
@@ -262,10 +262,10 @@ private void ExportMeshExtensions(Mesh mesh, GLTFMeshExtensions ext, Skeleton sk
         ext.Cloth01 = user.ClothFlags.HasClothFlag01();
         ext.Cloth02 = user.ClothFlags.HasClothFlag02();
         ext.Cloth04 = user.ClothFlags.HasClothFlag04();
-        ext.Impostor = user.IsImpostor[0]  == 1;
+        ext.Impostor = user.IsImpostor != null && user.IsImpostor.Length > 0 && user.IsImpostor[0] == 1;
         ext.ExportOrder = mesh.ExportOrder;
-        ext.LOD = (user.Lod[0] >= 0) ? user.Lod[0] : 0;
-        ext.LODDistance = (user.LodDistance[0] < 100000000.0f) ? user.LodDistance[0] : 0.0f;
+        ext.LOD = (user.Lod != null && user.Lod.Length > 0 && user.Lod[0] >= 0) ? user.Lod[0] : 0;
+        ext.LODDistance = (user.LodDistance != null && user.LodDistance.Length > 0 && user.LodDistance[0] < 100000000.0f) ? user.LodDistance[0] : 0.0f;
         if (!mesh.IsSkinned() && mesh.BoneBindings != null && mesh.BoneBindings.Count == 1 && skeleton != null && !skeleton.IsDummy)
         {
             ext.ParentBone = mesh.BoneBindings[0].BoneName;