diff --git a/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp b/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp
index 01afca22..1cd2017f 100644
--- a/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp
+++ b/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp
@@ -148,7 +148,7 @@ namespace MobileGL {
                     return false;
                 }
 
-                for (size_t i = 0; i < levelCount; ++i) {
+                for (SizeT i = 0; i < levelCount; ++i) {
                     const auto& levelSize = m_textureStorage.GetTexelSize(0, i);
                     if (levelSize.x() <= 0 || levelSize.y() <= 0 || levelSize.z() <= 0) {
                         return false;
diff --git a/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.cpp b/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.cpp
index 62e9aa14..e5bd6db7 100644
--- a/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.cpp
+++ b/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.cpp
@@ -54,6 +54,35 @@ namespace MobileGL {
                                 "Invalid TextureUploadTarget!");
                 return (Uint)target - (Uint)TextureUploadTarget::CubeMapPositiveX;
             }
+
+            IntVec3 TextureObject2DCube::GetBaseSize() const {
+                if (m_textureStorage.GetLevelCount() == 0) {
+                    return {0, 0, 0};
+                }
+                return m_textureStorage.GetTexelSize(0, 0);
+            }
+
+            Bool TextureObject2DCube::IsComplete() const {
+                if (!TextureObjectBase::IsComplete())
+                    return false;
+
+                SizeT levelCount = m_textureStorage.GetLevelCount();
+                if (levelCount == 0) {
+                    return false;
+                }
+
+                for (SizeT t = 0; t < 6; ++t) {
+                    for (SizeT i = 0; i < levelCount; ++i) {
+                        const auto &levelSize = m_textureStorage.GetTexelSize(t, i);
+                        if (levelSize.x() <= 0 || levelSize.y() <= 0 || levelSize.z() <= 0) {
+                            return false;
+                        }
+                    }
+                }
+
+                // TODO: add more completeness checks based on texture type and mipmap levels
+                return true;
+            }
         }
     }
 }
diff --git a/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.h b/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.h
index 138e5f0b..2ed668a4 100644
--- a/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.h
+++ b/MobileGL/MG_State/GLState/TextureState/TextureObject2DCube.h
@@ -20,6 +20,9 @@ namespace MobileGL {
                 void* MapMipmapData(TextureUploadTarget uploadTarget, Uint mipmapLevel) override;
                 void MarkStorageDirty(TextureUploadTarget uploadTarget, Uint mipmapLevel, bool dirty) override;
                 bool IsStorageDirty(TextureUploadTarget uploadTarget, Uint mipmapLevel) const override;
+
+                IntVec3 GetBaseSize() const override;
+                Bool IsComplete() const override;
             protected:
                 Uint GetIndexOfTextureUploadTarget(TextureUploadTarget target) const override;
                 TextureStorage<6> m_textureStorage;