Automated test for the feature

test/lib/mayaUsd/render/mayaToHydra/CMakeLists.txt

@@ -12,6 +12,7 @@ set(INTERACTIVE_TEST_SCRIPT_FILES
     testSceneBrowser.py
     testStageAddPrim.py
     testTransforms.py
+    testRefinement.py
     testMaterialXOnNative.py
     testNewSceneWithStage.py
     testMayaDisplayModes.py

test/lib/mayaUsd/render/mayaToHydra/testRefinement.py

@@ -0,0 +1,61 @@
+# Copyright 2024 Autodesk
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+import maya.cmds as cmds
+
+import fixturesUtils
+import mtohUtils
+import unittest
+import testUtils
+
+class TestRefinement(mtohUtils.MtohTestCase):
+    _file = __file__
+
+    IMAGEDIFF_FAIL_THRESHOLD = 0.01
+    IMAGEDIFF_FAIL_PERCENT = 0.1
+
+    def verifySnapshot(self, imageName):
+        cmds.refresh()
+        self.assertSnapshotClose(imageName, 
+                                 self.IMAGEDIFF_FAIL_THRESHOLD,
+                                 self.IMAGEDIFF_FAIL_PERCENT)
+
+    @unittest.skipUnless(mtohUtils.checkForMayaUsdPlugin(), "Requires Maya USD Plugin.")
+    def test_usdPrim(self):
+        import usdUtils
+        usdScenePath = testUtils.getTestScene('testStagePayloadsReferences', 'cube.usda')
+        usdUtils.createStageFromFile(usdScenePath)
+
+        self.setBasicCam(1)
+        self.setHdStormRenderer()
+        cmds.mayaHydra(createRenderGlobals=1)
+
+        cmds.setAttr("defaultRenderGlobals.mtohRefinementLevel", 0)
+        cmds.mayaHydra(updateRenderGlobals="mtohRefinementLevel")
+        self.verifySnapshot("usd_cube_refined_0.png")
+
+        cmds.setAttr("defaultRenderGlobals.mtohRefinementLevel", 2)
+        cmds.mayaHydra(updateRenderGlobals="mtohRefinementLevel")
+        self.verifySnapshot("usd_cube_refined_2.png")
+
+        cmds.setAttr("defaultRenderGlobals.mtohRefinementLevel", 4)
+        cmds.mayaHydra(updateRenderGlobals="mtohRefinementLevel")
+        self.verifySnapshot("usd_cube_refined_4.png")
+
+        #restore the default
+        cmds.setAttr("defaultRenderGlobals.mtohRefinementLevel", 0)
+        cmds.mayaHydra(updateRenderGlobals="mtohRefinementLevel")
+
+if __name__ == '__main__':
+    fixturesUtils.runTests(globals())