Added renderPrep back to vray - error seems to be resolved in new version

azure_batch_maya/templates/vray-basic-linux.json

@@ -113,7 +113,7 @@
           "elevationLevel": "admin"
         }
       },
-      "commandLine": "sudo mkdir -m a=rwx -p \"/X\";sudo mount --rbind $AZ_BATCH_JOB_PREP_WORKING_DIR/assets /X;Render -renderer [parameters('renderer')] -proj \"$AZ_BATCH_JOB_PREP_WORKING_DIR\" -verb -rd \"$AZ_BATCH_TASK_WORKING_DIR/images\" -s {0} -e {0} \"[parameters('sceneFile')]\";err=$?;python /mnt/resource/batch/tasks/workitems/[parameters('outputs')]/job-1/jobpreparation/wd/thumbnail.py $err;sudo umount \"/X\";exit $err",
+      "commandLine": "sudo mkdir -m a=rwx -p \"/X\";sudo mount --rbind $AZ_BATCH_JOB_PREP_WORKING_DIR/assets /X;Render -renderer [parameters('renderer')] -proj \"$AZ_BATCH_JOB_PREP_WORKING_DIR\" -verb -preRender renderPrep -rd \"$AZ_BATCH_TASK_WORKING_DIR/images\" -s {0} -e {0} \"[parameters('sceneFile')]\";err=$?;python /mnt/resource/batch/tasks/workitems/[parameters('outputs')]/job-1/jobpreparation/wd/thumbnail.py $err;sudo umount \"/X\";exit $err",
       "environmentSettings": [
         {
           "name": "MAYA_SCRIPT_PATH",

azure_batch_maya/templates/vray-basic-windows.json

@@ -107,7 +107,7 @@
     ],
     "repeatTask": {
       "displayName": "Frame {0}",
-      "commandLine": "subst X: %AZ_BATCH_JOB_PREP_WORKING_DIR%\\assets & render -renderer [parameters('renderer')] -proj \"%AZ_BATCH_JOB_PREP_WORKING_DIR%\" -verb -rd \"%AZ_BATCH_TASK_WORKING_DIR%\\images\" -s {0} -e {0} \"[parameters('sceneFile')]\" & call mayapy %AZ_BATCH_JOB_PREP_WORKING_DIR%\\thumbnail.py %^errorlevel%",
+      "commandLine": "subst X: %AZ_BATCH_JOB_PREP_WORKING_DIR%\\assets & render -renderer [parameters('renderer')] -proj \"%AZ_BATCH_JOB_PREP_WORKING_DIR%\" -verb -preRender renderPrep -rd \"%AZ_BATCH_TASK_WORKING_DIR%\\images\" -s {0} -e {0} \"[parameters('sceneFile')]\" & call mayapy %AZ_BATCH_JOB_PREP_WORKING_DIR%\\thumbnail.py %^errorlevel%",
       "environmentSettings": [
         {
           "name": "MAYA_SCRIPT_PATH",