[Help] Suddenty unable to do anything in Iray

Hi there,

I'm having a weird issue.

Iray no longer appears to work for me. This started this morning. 

Essentially, I load any reasonable scene, with a couple of figures, an environment, a few props etc, something I've been able to render already (I've tried 30-40 old scenes so far), and as soon as I go into Iray preview, Daz crashes. 

Here's an example from the log:

2026-06-11 00:14:48.635 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating environment.

2026-06-11 00:14:48.638 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating compiled material code.

2026-06-11 00:14:48.639 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating compiled environment code.

2026-06-11 00:14:48.639 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating material textures.

2026-06-11 00:14:48.699 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating environment textures.

2026-06-11 00:14:48.699 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating BSDFs.

2026-06-11 00:14:48.700 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating volumes.

2026-06-11 00:14:48.700 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating lens.

2026-06-11 00:14:48.700 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating lights.

2026-06-11 00:14:48.700 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating object flags.

2026-06-11 00:14:48.703 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating backplate.

2026-06-11 00:14:48.703 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating compiled backplate code.

2026-06-11 00:14:48.703 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating backplate textures.

2026-06-11 00:14:48.703 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Updating decals.

2026-06-11 00:14:48.757 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Using iray core convergence estimate.

2026-06-11 00:14:48.766 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Allocating 1-layer frame buffer

2026-06-11 00:14:48.769 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Using interactive scheduling, caustic sampler disabled

2026-06-11 00:14:48.770 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Initializing local rendering.

2026-06-11 00:14:48.806 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : CPU: using 11 cores for rendering

2026-06-11 00:14:48.824 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Initializing OptiX for CUDA device 0

2026-06-11 00:14:52.061 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Rendering with 2 device(s):

2026-06-11 00:14:52.061 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : CUDA device 0 (NVIDIA GeForce RTX 4080)

2026-06-11 00:14:52.061 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : CPU

2026-06-11 00:14:52.061 Iray [INFO] - IRAY:RENDER ::   1.0   IRAY   rend info : Rendering...

2026-06-11 00:14:52.062 Iray [INFO] - IRAY:RENDER ::   1.5   IRAY   rend progr: CPU: Processing scene...

2026-06-11 00:14:52.063 Iray [INFO] - IRAY:RENDER ::   1.6   IRAY   rend progr: CUDA device 0 (NVIDIA GeForce RTX 4080): Processing scene...

2026-06-11 00:14:52.067 Iray [INFO] - IRAY:RENDER ::   1.14  IRAY   rend info : Initializing Embree

2026-06-11 00:15:10.739 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [ERROR] - IMAGE:IO ::   1.12  IMAGE  io   error: The image plugin "oiio_jpg" failed to import "C:\Users\redacted\Documents\DAZ 3D\Studio\My Library\Runtime\Textures\Daz\Characters\Genesis9\Base\Eyelashes\Genesis9_Eyelashes02_NM.jpg".

2026-06-11 00:15:10.819 [WARNING] :: \src\pluginsource\DzIrayRender\dzneuraymgr.cpp(373): Iray [ERROR] - IMAGE:IO ::   1.10  IMAGE  io   error: The image plugin "oiio_jpg" failed to import "D:\Library2\Runtime\Textures\Daz\Characters\Genesis9\Michael9\Michael9_BodyM_D_1002.jpg".

then the crash.

This is happening in 4.24. In 6, the issue is different, I click Iray preview and it sits there loading Iray preview until the end of time. It doesn't actually do anything.

Here are my system specs:

         Operating System: Windows 10 Home 64-bit (10.0, Build 19045) (19041.vb_release.191206-1406)
      System Manufacturer: Micro-Star International Co., Ltd.
             System Model: MS-7D17
                     BIOS: 1.20 (type: UEFI)
                Processor: 11th Gen Intel(R) Core(TM) i5-11400F @ 2.60GHz (12 CPUs), ~2.6GHz
                   Memory: 16384MB RAM
      Available OS Memory: 16282MB RAM
                Page File: 28176MB used, 5284MB available
              Windows Dir: C:\Windows
          DirectX Version: DirectX 12
      DX Setup Parameters: Not found
         User DPI Setting: 96 DPI (100 percent)
       System DPI Setting: 96 DPI (100 percent)
          DWM DPI Scaling: Disabled
                 Miracast: Available, no HDCP
Microsoft Graphics Hybrid: Not Supported
 DirectX Database Version: 1.0.8
           DxDiag Version: 10.00.19041.5794 64bit Unicode

       Card name: NVIDIA GeForce RTX 4080
        Manufacturer: NVIDIA
           Chip type: NVIDIA GeForce RTX 4080
            DAC type: Integrated RAMDAC
         Device Type: Full Device (POST)
          Device Key: Enum\PCI\VEN_10DE&DEV_2704&SUBSYS_51121462&REV_A1
       Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER] 
 Device Problem Code: No Problem
 Driver Problem Code: Unknown
      Display Memory: 24190 MB
    Dedicated Memory: 16050 MB
       Shared Memory: 8140 MB
        Current Mode: 1920 x 1080 (32 bit) (60Hz)
         HDR Support: Not Supported

I have tried the following:

Installing the latest Nvidia Game ready drivers

Installing the latest Nvidia Studio drivers

Reinstalling Daz 4.24

Reinstalling Daz 6

None of this has worked at all. It's pretty demoralising. It's like a 'no daz for you' switch has been flicked.