diff --git a/doc/changelog.dox b/doc/changelog.dox
index a602153dd..946c68808 100644
--- a/doc/changelog.dox
+++ b/doc/changelog.dox
@@ -485,7 +485,8 @@ See also:
     @ref Trade::PbrMetallicRoughnessMaterialData,
     @ref Trade::PbrSpecularGlossinessMaterialData and
     @ref Trade::PbrClearCoatMaterialData convenience accessor APIs similar to
-    @ref Trade::PhongMaterialData. See [mosra/magnum#459](https://github.com/mosra/magnum/pull/459).
+    @ref Trade::PhongMaterialData. See also [mosra/magnum#459](https://github.com/mosra/magnum/pull/459)
+    and [mosra/magnum#662](https://github.com/mosra/magnum/issues/662).
 -   Added @ref Trade::PhongMaterialData::hasSpecularTexture(),
     @ref Trade::PhongMaterialData::specularTextureSwizzle(),
     @ref Trade::PhongMaterialData::normalTextureScale() and
diff --git a/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.cpp b/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.cpp
index 5291a0b7f..2438e36b2 100644
--- a/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.cpp
+++ b/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.cpp
@@ -56,15 +56,21 @@ bool PbrMetallicRoughnessMaterialData::hasNoneRoughnessMetallicTexture() const {
 }
 
 bool PbrMetallicRoughnessMaterialData::hasOcclusionRoughnessMetallicTexture() const {
-    if(!hasAttribute(MaterialAttribute::OcclusionTexture) ||
-       !hasAttribute(MaterialAttribute::RoughnessTexture) ||
-       !hasAttribute(MaterialAttribute::MetalnessTexture))
+    if(!hasAttribute(MaterialAttribute::OcclusionTexture))
         return false;
 
     const UnsignedInt occlusionTexture = attribute<UnsignedInt>(MaterialAttribute::OcclusionTexture);
-    if(attribute<UnsignedInt>(MaterialAttribute::RoughnessTexture) != occlusionTexture ||
-       attribute<UnsignedInt>(MaterialAttribute::MetalnessTexture) != occlusionTexture ||
-       occlusionTextureSwizzle() != MaterialTextureSwizzle::R ||
+    if(hasAttribute(MaterialAttribute::NoneRoughnessMetallicTexture)) {
+        if(attribute<UnsignedInt>(MaterialAttribute::NoneRoughnessMetallicTexture) != occlusionTexture)
+            return false;
+    } else if(hasAttribute(MaterialAttribute::MetalnessTexture) &&
+              hasAttribute(MaterialAttribute::RoughnessTexture)) {
+        if(attribute<UnsignedInt>(MaterialAttribute::RoughnessTexture) != occlusionTexture ||
+           attribute<UnsignedInt>(MaterialAttribute::MetalnessTexture) != occlusionTexture)
+            return false;
+    } else return false;
+
+    if(occlusionTextureSwizzle() != MaterialTextureSwizzle::R ||
        roughnessTextureSwizzle() != MaterialTextureSwizzle::G ||
        metalnessTextureSwizzle() != MaterialTextureSwizzle::B)
         return false;
diff --git a/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.h b/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.h
index 3aa267c02..52468c100 100644
--- a/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.h
+++ b/src/Magnum/Trade/PbrMetallicRoughnessMaterialData.h
@@ -124,13 +124,15 @@ class MAGNUM_TRADE_EXPORT PbrMetallicRoughnessMaterialData: public MaterialData
         /**
          * @brief Whether the material has a combined occlusion/roughness/metallic texture
          *
-         * Returns @cpp true @ce if @ref MaterialAttribute::OcclusionTexture,
-         * @ref MaterialAttribute::RoughnessTexture and
-         * @ref MaterialAttribute::MetalnessTexture are all present, point to
-         * the same texture ID, @ref MaterialAttribute::OcclusionTextureSwizzle
-         * is set to @ref MaterialTextureSwizzle::R (or omitted, in which case
-         * it's the default), @ref MaterialAttribute::RoughnessTextureSwizzle
-         * is set to @ref MaterialTextureSwizzle::G and
+         * Returns @cpp true @ce if @ref MaterialAttribute::OcclusionTexture
+         * and either the @ref MaterialAttribute::NoneRoughnessMetallicTexture
+         * attribute is present or both @ref MaterialAttribute::RoughnessTexture
+         * and @ref MaterialAttribute::MetalnessTexture are present and they
+         * point to the same texture ID,
+         * @ref MaterialAttribute::OcclusionTextureSwizzle is set to
+         * @ref MaterialTextureSwizzle::R (or omitted, in which case it's the
+         * default), @ref MaterialAttribute::RoughnessTextureSwizzle is set to
+         * @ref MaterialTextureSwizzle::G and
          * @ref MaterialAttribute::MetalnessTextureSwizzle is set to
          * @ref MaterialTextureSwizzle::B, and additionally
          * @ref MaterialAttribute::OcclusionTextureMatrix,
diff --git a/src/Magnum/Trade/Test/PbrMetallicRoughnessMaterialDataTest.cpp b/src/Magnum/Trade/Test/PbrMetallicRoughnessMaterialDataTest.cpp
index e3cfab937..e0ef6f5d5 100644
--- a/src/Magnum/Trade/Test/PbrMetallicRoughnessMaterialDataTest.cpp
+++ b/src/Magnum/Trade/Test/PbrMetallicRoughnessMaterialDataTest.cpp
@@ -40,6 +40,7 @@ struct PbrMetallicRoughnessMaterialDataTest: TestSuite::Tester {
     void defaults();
     void textured();
     void texturedDefaults();
+    void texturedImplicitPackedNoneRoughnessMetallic();
     void texturedExplicitPackedNoneRoughnessMetallic();
     void texturedImplicitPackedOcclusionRoughnessMetallic();
     void texturedExplicitPackedOcclusionRoughnessMetallic();
@@ -68,6 +69,7 @@ PbrMetallicRoughnessMaterialDataTest::PbrMetallicRoughnessMaterialDataTest() {
               &PbrMetallicRoughnessMaterialDataTest::defaults,
               &PbrMetallicRoughnessMaterialDataTest::textured,
               &PbrMetallicRoughnessMaterialDataTest::texturedDefaults,
+              &PbrMetallicRoughnessMaterialDataTest::texturedImplicitPackedNoneRoughnessMetallic,
               &PbrMetallicRoughnessMaterialDataTest::texturedExplicitPackedNoneRoughnessMetallic,
               &PbrMetallicRoughnessMaterialDataTest::texturedImplicitPackedOcclusionRoughnessMetallic,
               &PbrMetallicRoughnessMaterialDataTest::texturedExplicitPackedOcclusionRoughnessMetallic,
@@ -475,6 +477,106 @@ void PbrMetallicRoughnessMaterialDataTest::texturedExplicitPackedNoneRoughnessMe
     }
 }
 
+void PbrMetallicRoughnessMaterialDataTest::texturedImplicitPackedOcclusionRoughnessMetallic() {
+    /* Just the texture IDs, the rest is implicit */
+    {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::OcclusionTexture, 2u},
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 2u},
+        }};
+        CORRADE_VERIFY(data.hasOcclusionRoughnessMetallicTexture());
+        CORRADE_VERIFY(!data.hasRoughnessMetallicOcclusionTexture());
+        /* This is a superset */
+        CORRADE_VERIFY(data.hasNoneRoughnessMetallicTexture());
+
+    /* Explicit parameters for everything, but all the same */
+    } {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::OcclusionTexture, 2u},
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 2u},
+            {MaterialAttribute::OcclusionTextureSwizzle, MaterialTextureSwizzle::R},
+            {MaterialAttribute::OcclusionTextureMatrix, Matrix3::scaling({0.5f, 0.5f})},
+            {MaterialAttribute::OcclusionTextureCoordinates, 3u},
+            {MaterialAttribute::OcclusionTextureLayer, 17u},
+            {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::G},
+            {MaterialAttribute::RoughnessTextureMatrix, Matrix3::scaling({0.5f, 0.5f})},
+            {MaterialAttribute::RoughnessTextureCoordinates, 3u},
+            {MaterialAttribute::RoughnessTextureLayer, 17u},
+            {MaterialAttribute::MetalnessTextureMatrix, Matrix3::scaling({0.5f, 0.5f})},
+            {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::B},
+            {MaterialAttribute::MetalnessTextureCoordinates, 3u},
+            {MaterialAttribute::MetalnessTextureLayer, 17u}
+        }};
+        CORRADE_VERIFY(data.hasOcclusionRoughnessMetallicTexture());
+        CORRADE_VERIFY(!data.hasRoughnessMetallicOcclusionTexture());
+        /* This is a superset */
+        CORRADE_VERIFY(data.hasNoneRoughnessMetallicTexture());
+
+    /* Different texture ID */
+    } {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::OcclusionTexture, 2u},
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 3u},
+            {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::G},
+            {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::B},
+        }};
+        CORRADE_VERIFY(!data.hasOcclusionRoughnessMetallicTexture());
+
+    /* One texture missing */
+    } {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 2u},
+            {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::G},
+            {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::B},
+        }};
+        CORRADE_VERIFY(!data.hasOcclusionRoughnessMetallicTexture());
+
+    /* Unexpected swizzle */
+    } {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::OcclusionTexture, 2u},
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 2u},
+            {MaterialAttribute::OcclusionTextureSwizzle, MaterialTextureSwizzle::A},
+            {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::G},
+            {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::B},
+        }};
+        CORRADE_VERIFY(!data.hasOcclusionRoughnessMetallicTexture());
+
+    /* Unexpected texture matrix */
+    } {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::OcclusionTexture, 2u},
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 2u},
+            {MaterialAttribute::OcclusionTextureMatrix, Matrix3::scaling({0.5f, 1.0f})},
+            {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::G},
+            {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::B},
+        }};
+        CORRADE_VERIFY(!data.hasOcclusionRoughnessMetallicTexture());
+
+    /* Unexpected texture coordinates */
+    } {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::OcclusionTexture, 2u},
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 2u},
+            {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::G},
+            {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::B},
+            {MaterialAttribute::MetalnessTextureCoordinates, 1u},
+        }};
+        CORRADE_VERIFY(!data.hasOcclusionRoughnessMetallicTexture());
+
+    /* Unexpected array texture layer */
+    } {
+        PbrMetallicRoughnessMaterialData data{{}, {
+            {MaterialAttribute::OcclusionTexture, 2u},
+            {MaterialAttribute::NoneRoughnessMetallicTexture, 2u},
+            {MaterialAttribute::OcclusionTextureLayer, 1u},
+            {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::G},
+            {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::B},
+        }};
+        CORRADE_VERIFY(!data.hasOcclusionRoughnessMetallicTexture());
+    }
+}
+
 void PbrMetallicRoughnessMaterialDataTest::texturedExplicitPackedOcclusionRoughnessMetallic() {
     /* Just the texture IDs and swizzles, the rest is implicit */
     {
@@ -713,14 +815,17 @@ void PbrMetallicRoughnessMaterialDataTest::texturedExplicitPackedNormalRoughness
             {MaterialAttribute::NormalTextureSwizzle, MaterialTextureSwizzle::RG},
             {MaterialAttribute::NormalTextureMatrix, Matrix3::scaling({0.5f, 0.5f})},
             {MaterialAttribute::NormalTextureCoordinates, 3u},
+            {MaterialAttribute::NormalTextureLayer, 17u},
             {MaterialAttribute::RoughnessTexture, 2u},
             {MaterialAttribute::RoughnessTextureSwizzle, MaterialTextureSwizzle::B},
             {MaterialAttribute::RoughnessTextureMatrix, Matrix3::scaling({0.5f, 0.5f})},
             {MaterialAttribute::RoughnessTextureCoordinates, 3u},
+            {MaterialAttribute::RoughnessTextureLayer, 17u},
             {MaterialAttribute::MetalnessTexture, 2u},
             {MaterialAttribute::MetalnessTextureMatrix, Matrix3::scaling({0.5f, 0.5f})},
             {MaterialAttribute::MetalnessTextureSwizzle, MaterialTextureSwizzle::A},
-            {MaterialAttribute::MetalnessTextureCoordinates, 3u}
+            {MaterialAttribute::MetalnessTextureCoordinates, 3u},
+            {MaterialAttribute::MetalnessTextureLayer, 17u}
         }};
         CORRADE_VERIFY(data.hasNormalRoughnessMetallicTexture());