How to enable iray in python script?

Hi,

According to this post, Isaac Sim supports Iray rendering in Python script. However, I am getting errors when setting the viewport render to Iray. Here’s the error:

Failed to create Hydra Engine for viewport!
No hydra engine was found with name 'iray'

Here’s the code I am trying to run:

import cv2

class FrankaEnv:
    def __init__(self, scene_path, physics_dt=1.0/25.0, rendering_dt = 1.0/25.0, 
                 headless=True, image_width=720, image_height=540):
        
        from omni.isaac.kit import SimulationApp
        self._simulation_app = SimulationApp({"headless": headless})

        from omni.isaac.core.utils.stage import open_stage
        open_stage(usd_path=scene_path)

        from omni.isaac.sensor import Camera
        from omni.isaac.core.world import World
        
        self._world = World(stage_units_in_meters=1.0, physics_dt=physics_dt, rendering_dt=rendering_dt)
        
        self._camera1 = Camera(
            prim_path="/World/camera_top",
            resolution=(image_width, image_height)
        ) 
        
        self._camera2 = Camera(
            prim_path="/World/franka/panda_hand/camera_arm",
            resolution=(image_width, image_height)
        ) 

        self._need_reset = True

        
    def reset(self):       
        from omni.kit.viewport.utility import get_active_viewport

        viewport_api = get_active_viewport()
        viewport_api.set_hd_engine("iray", "iray")
        
        self._world.reset()
        
        self._camera1.initialize()
        self._camera2.initialize()

        img1 = img2 = None
        for i in range(10):
            self._world.step(render=True)
            img1 = self._camera1.get_rgb()
            img2 = self._camera2.get_rgb()
        
        for i in range(50):
            self._world.step(render=True)
            img1 = self._camera1.get_rgb()
            img2 = self._camera2.get_rgb()
            cv2.imshow("img1", cv2.cvtColor(img1,cv2.COLOR_BGR2RGB)) 
            cv2.imshow("img2", cv2.cvtColor(img2,cv2.COLOR_BGR2RGB)) 
            cv2.waitKey(1) 
        
        cv2.destroyAllWindows() 
        

path = '.../franka_table_cam.usd'
env = FrankaEnv(path)
env.reset()

The USD file can be found here: GdriveLink

This is the terminal log:

fahim@fs:~/.local/share/ov/pkg/isaac_sim-2023.1.1$ ./python.sh RR/franka_env.py
Starting kit application with the following args:  ['/home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/exts/omni.isaac.kit/omni/isaac/kit/simulation_app.py', '/home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/apps/omni.isaac.sim.python.kit', '--/app/tokens/exe-path=/home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/kit', '--/persistent/app/viewport/displayOptions=3094', '--/rtx/materialDb/syncLoads=True', '--/rtx/hydra/materialSyncLoads=True', '--/omni.kit.plugin/syncUsdLoads=True', '--/app/renderer/resolution/width=1280', '--/app/renderer/resolution/height=720', '--/app/window/width=1440', '--/app/window/height=900', '--/renderer/multiGpu/enabled=True', '--/app/fastShutdown=True', '--ext-folder', '/home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/exts', '--ext-folder', '/home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/apps', '--/physics/cudaDevice=0', '--portable', '--no-window']
Passing the following args to the base kit application:  []
[Info] [carb] Logging to file: /home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/logs/Kit/Isaac-Sim/2023.1/kit_20240403_125720.log
2024-04-03 18:57:20 [0ms] [Warning] [omni.kit.app.plugin] No crash reporter present, dumps uploading isn't available.
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|---------------------------------------------------------------------------------------------|
| Driver Version: 545.23.06     | Graphics API: Vulkan
|=============================================================================================|
| GPU | Name                             | Active | LDA | GPU Memory | Vendor-ID | LUID       |
|     |                                  |        |     |            | Device-ID | UUID       |
|     |                                  |        |     |            | Bus-ID    |            |
|---------------------------------------------------------------------------------------------|
| 0   | NVIDIA GeForce RTX 3090          | Yes: 0 |     | 24576   MB | 10de      | 0          |
|     |                                  |        |     |            | 2204      | bb051821.. |
|     |                                  |        |     |            | 2b        |            |
|=============================================================================================|
| OS: 22.04.3 LTS (Jammy Jellyfish) ubuntu, Version: 22.04.3, Kernel: 6.5.0-26-generic
| XServer Vendor: The X.Org Foundation, XServer Version: 12101004 (1.21.1.4)
| Processor: AMD Ryzen 7 5800X3D 8-Core Processor | Cores: 8 | Logical: 16
|---------------------------------------------------------------------------------------------|
| Total Memory (MB): 64215 | Free Memory: 56206
| Total Page/Swap (MB): 0 | Free Page/Swap: 0
|---------------------------------------------------------------------------------------------|
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Warp 1.0.0-beta.2 initialized:
   CUDA Toolkit: 11.5, Driver: 12.3
   Devices:
     "cpu"    | x86_64
     "cuda:0" | NVIDIA GeForce RTX 3090 (sm_86)
   Kernel cache: /home/fahim/.cache/warp/1.0.0-beta.2
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[4.051s] [ext: omni.kit.viewport.actions-105.1.6] startup
[4.056s] [ext: omni.kit.widget.toolbar-1.5.6] startup
[4.063s] [ext: omni.kit.raycast.query-1.0.1] startup
[4.071s] [ext: omni.kit.manipulator.transform-104.6.15] startup
[4.073s] [ext: omni.rtx.window.settings-0.6.9] startup
[4.077s] [ext: omni.kit.viewport.menubar.display-105.1.0] startup
[4.079s] [ext: omni.kit.manipulator.tool.snap-1.4.2] startup
[4.085s] [ext: omni.hydra.pxr.settings-1.0.5] startup
[4.087s] [ext: omni.activity.pump-1.0.0] startup
[4.088s] [ext: omni.physx.commands-105.1.12-5.1] startup
[4.091s] [ext: omni.usdphysics.ui-105.1.12-5.1] startup
[4.128s] [ext: omni.kit.widget.live-2.1.6] startup
[4.129s] [ext: omni.kit.viewport.pxr-104.0.1] startup
[4.130s] [ext: omni.kit.viewport.ready-1.0.5] startup
[4.131s] [ext: omni.kit.viewport.rtx-104.0.0] startup
[4.131s] [ext: omni.physx.ui-105.1.12-5.1] startup
[4.160s] [ext: omni.kit.widget.cache_indicator-2.0.8] startup
[4.162s] [ext: usdrt.gf-1.0.2] startup
[4.162s] [ext: omni.kit.manipulator.selector-1.0.1] startup
[4.164s] [ext: omni.kit.window.commands-0.2.4] startup
[4.165s] [ext: omni.kit.window.console-0.2.10] startup
[4.174s] [ext: omni.kit.property.physx-0.1.0] startup
[4.230s] [ext: omni.kit.actions.window-1.1.0] startup
[4.233s] [ext: omni.physx.demos-105.1.12-5.1] startup
[4.237s] [ext: omni.kit.manipulator.prim-105.0.11] startup
[4.242s] [ext: omni.kit.window.toolbar-1.5.4] startup
[4.244s] [ext: omni.kit.manipulator.selection-104.0.8] startup
[4.246s] [ext: omni.kit.window.script_editor-1.7.4] startup
[4.249s] [ext: omni.kit.hotkeys.window-1.4.1] startup
[4.254s] [ext: omni.physx.camera-105.1.12-5.1] startup
[4.261s] [ext: omni.physx.cct-105.1.12-5.1] startup
[4.275s] [ext: omni.physx.graph-105.1.12-5.1] startup
[4.286s] [ext: omni.physx.supportui-105.1.12-5.1] startup
[4.300s] [ext: omni.physx.vehicle-105.1.12-5.1] startup
[4.311s] [ext: omni.kit.stage_column.payload-1.0.12] startup
[4.313s] [ext: omni.graph.ui_nodes-1.5.10] startup
[4.349s] [ext: omni.sensors.nv.common-1000.0.0-isaacsim.2023.1.1] startup
[4.356s] [ext: omni.sensors.nv.materials-1000.0.0-isaacsim.2023.1.1] startup
[4.359s] [ext: omni.sensors.nv.wpm-1000.0.0-isaacsim.2023.1.1] startup
[4.360s] [ext: omni.kit.window.status_bar-0.1.6] startup
[4.365s] [ext: omni.physx.bundle-105.1.12-5.1] startup
[4.365s] [ext: omni.graph.bundle.action-2.0.4] startup
[4.365s] [ext: omni.isaac.range_sensor-2.0.2] startup
[4.407s] [ext: omni.sensors.nv.lidar-1000.0.1-isaacsim.2023.1.1] startup
[4.412s] [ext: omni.sensors.nv.radar-1000.0.0-isaacsim.2023.1.1] startup
[4.417s] [ext: omni.kit.window.title-1.1.3] startup
[4.418s] [ext: omni.replicator.composer-1.2.17] startup
[4.437s] [ext: omni.replicator.isaac-1.11.3] startup
[4.465s] [ext: omni.kit.manipulator.camera-105.0.4] startup
[4.468s] [ext: omni.kit.viewport.menubar.camera-105.1.9] startup
[4.473s] [ext: omni.isaac.sensor-9.11.1] startup
[4.565s] [ext: omni.kit.viewport.menubar.render-105.1.1] startup
[4.568s] [ext: omni.kit.viewport.menubar.settings-105.0.9] startup
[4.572s] [ext: omni.replicator.replicator_yaml-2.0.4] startup
[4.581s] [ext: omni.rtx.settings.core-0.5.13] startup
[4.585s] [ext: omni.kit.stage_column.variant-1.0.13] startup
[4.587s] [ext: omni.isaac.quadruped-1.4.1] startup
[4.598s] [ext: semantics.schema.property-1.0.2] startup
[4.600s] [ext: omni.kit.viewport.bundle-104.0.1] startup
[4.601s] [ext: omni.isaac.scene_blox-0.1.0] startup
[4.603s] [ext: omni.importer.urdf-1.6.1] startup
[4.641s] [ext: omni.importer.mjcf-1.1.0] startup
[4.648s] [ext: omni.kit.window.stats-0.1.4] startup
[4.650s] [ext: omni.isaac.sim.python-2023.1.1] startup
[4.651s] Simulation App Starting
2024-04-03 18:57:25 [4,659ms] [Warning] [omni.kit.widget.settings.settings_model] a value for setting /rtx/ecoMode/enabled has been requested but is not available
2024-04-03 18:57:25 [4,660ms] [Warning] [omni.kit.widget.settings.settings_model] a value for setting /rtx/directLighting/enabled has been requested but is not available
2024-04-03 18:57:25 [4,660ms] [Warning] [omni.kit.widget.settings.settings_model] a value for setting /rtx/reflections/enabled has been requested but is not available
2024-04-03 18:57:25 [4,660ms] [Warning] [omni.kit.widget.settings.settings_model] a value for setting /rtx/translucency/enabled has been requested but is not available
2024-04-03 18:57:25 [4,660ms] [Warning] [omni.kit.widget.settings.settings_model] a value for setting /rtx/raytracing/subsurface/enabled has been requested but is not available
2024-04-03 18:57:25 [4,660ms] [Warning] [omni.kit.widget.settings.settings_model] a value for setting /rtx/caustics/enabled has been requested but is not available
2024-04-03 18:57:26 [5,751ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] duplicated action as SPACE (On Press) with omni.kit.widget.toolbar.omni.kit.widget.toolbar::toolbar::play!
2024-04-03 18:57:26 [5,751ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] Cannot register Global [omni.kit.widget.toolbar] omni.kit.widget.toolbar::toolbar::play.SPACE, error code: Duplicated action definition
[6.741s] app ready
2024-04-03 18:57:27 [7,079ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] duplicated action as SPACE (On Press) with omni.kit.widget.toolbar.omni.kit.widget.toolbar::toolbar::play!
2024-04-03 18:57:27 [7,079ms] [Warning] [omni.kit.hotkeys.core.registry] [Hotkey] Cannot register Global [omni.kit.widget.toolbar] omni.kit.widget.toolbar::toolbar::play.SPACE, error code: Duplicated action definition
[7.272s] RTX ready
[7.653s] Simulation App Startup Complete
2024-04-03 18:57:29 [8,290ms] [Warning] [omni.usd] Warning: in ReloadLayers at line 1077 of /buildAgent/work/ac88d7d902b57417/USD/pxr/usd/sdf/layer.cpp -- Unable to re-read @rl_chemist_task/franka_table_cam.usd@

2024-04-03 18:57:32 [11,117ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:32 [11,117ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:32 [11,144ms] [Warning] [omni.usd] Coding Error: in AddXformOp at line 208 of /buildAgent/work/ac88d7d902b57417/USD/pxr/usd/usdGeom/xformable.cpp -- XformOp </World/EastRural_Table.xformOp:scale> has typeName 'float3' which does not match the requested precision 'PrecisionDouble'. Proceeding to use existing typeName / precision.

2024-04-03 18:57:32 [11,145ms] [Warning] [omni.usd] Coding Error: in AddXformOp at line 208 of /buildAgent/work/ac88d7d902b57417/USD/pxr/usd/usdGeom/xformable.cpp -- XformOp </World/EastRural_Table_01.xformOp:scale> has typeName 'float3' which does not match the requested precision 'PrecisionDouble'. Proceeding to use existing typeName / precision.

2024-04-03 18:57:32 [11,146ms] [Warning] [omni.physx.plugin] Detected an articulation at /World/franka with more than 4 velocity iterations being added to a TGS scene.The related behavior changed recently, please consult the changelog. This warning will only print once.
2024-04-03 18:57:32 [11,149ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:32 [11,149ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:32 [11,158ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:32 [11,158ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:32 [11,277ms] [Warning] [omni.fabric.plugin] No source has valid data array=0x21832780 usdValid=0 cpuValid=0
2024-04-03 18:57:32 [11,306ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:32 [11,306ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:32 [12,073ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:32 [12,073ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:33 [12,775ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:33 [12,775ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:34 [13,415ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:34 [13,415ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:34 [14,062ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:34 [14,062ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:35 [14,716ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:35 [14,716ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:36 [15,365ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:36 [15,365ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:36 [16,013ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:36 [16,013ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:37 [16,657ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:37 [16,657ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:38 [17,284ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:38 [17,284ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:38 [17,907ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:38 [17,907ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:39 [18,566ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:39 [18,566ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:40 [19,209ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:40 [19,209ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:40 [19,844ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:40 [19,844ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:41 [20,485ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:41 [20,485ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:42 [21,126ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:42 [21,126ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:42 [21,814ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:42 [21,814ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:43 [22,482ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:43 [22,482ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:44 [23,150ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:44 [23,150ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:44 [23,807ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:44 [23,807ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:45 [24,458ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:45 [24,458ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:46 [25,112ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:46 [25,112ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:46 [25,765ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:46 [25,765ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:47 [26,414ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:47 [26,414ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:47 [27,068ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:47 [27,068ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:48 [27,722ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:48 [27,722ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:49 [28,378ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:49 [28,378ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:49 [29,032ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:49 [29,032ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:50 [29,688ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:50 [29,688ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:51 [30,345ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:51 [30,345ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:51 [31,003ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:51 [31,003ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:52 [31,656ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:52 [31,656ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:53 [32,312ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:53 [32,312ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:53 [32,969ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:53 [32,969ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,623ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,623ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,646ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,646ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,674ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,674ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,692ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,692ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,710ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,710ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,728ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,728ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,745ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,745ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,762ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,762ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,779ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,779ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,795ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,795ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,812ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,812ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,828ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,828ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,845ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,845ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,862ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,862ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,879ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,879ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,896ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,896ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,913ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,913ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,929ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,929ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,945ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,945ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,961ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,961ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,978ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,978ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [33,994ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [33,994ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [34,011ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [34,011ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [34,027ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [34,027ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [34,045ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [34,045ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:54 [34,061ms] [Warning] [omni.usd] No hydra engine was found with name 'iray', running at tickrate: '120' and matching hydraengine flags: '0x0'
2024-04-03 18:57:54 [34,061ms] [Warning] [omni.usd] Failed to create Hydra Engine for viewport!
2024-04-03 18:57:55 [34,090ms] [Warning] [carb] [Plugin: omni.spectree.delegate.plugin] Module /home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/exts/omni.usd_resolver/bin/libomni.spectree.delegate.plugin.so remained loaded after unload request
2024-04-03 18:57:55 [34,092ms] [Warning] [omni.stageupdate.plugin] Deprecated: direct use of IStageUpdate callbacks is deprecated. Use IStageUpdate::getStageUpdate instead.
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Node type name '' is missing the unique namespace
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Annotators' for removal
2024-04-03 18:57:55 [34,094ms] [Warning] [omni.graph.core.plugin] Could not find category 'Replicator:Core' for removal
2024-04-03 18:57:55 [34,098ms] [Warning] [carb.audio.context] 1 contexts were leaked
2024-04-03 18:57:55 [34,132ms] [Warning] [carb] Recursive unloadAllPlugins() detected!
2024-04-03 18:57:55 [34,144ms] [Warning] [omni.core.ITypeFactory] Module /home/fahim/.local/share/ov/pkg/isaac_sim-2023.1.1/kit/exts/omni.activity.core/bin/libomni.activity.core.plugin.so remained loaded after unload request.

Since I am working with glass objects, I think Iray is the best option for rendering.
I’m pretty sure I’ve set up Iray rendering incorrectly. How can I enable Iray when running a Python script? Thank you.

Hi fshahri1
Actually Isaac Sim was not on the list of the apps supported by Iray.
There seem to be too many dependencies that do not know about that render engine.
It will be hard to catch all that and have it working and future proof.

Could you tell us why you have issues with glass rendering and RTX?
That should not be the case.