Why does Daz Studio render results (sometimes) contain no background HDRI (high dynamic range image) images when rendering using Iray Server queue?
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This will depend on how Daz Studio sends the job to Iray Server in terms of which pixel type it asks for (which Iray Server doesn't control, Daz does) in order to process the render. To address this, do the following before rendering in your Iray Server queue:
Step 1: Log into your Iray Server Admin Page. (Click on the Iray Server Admin button on your Boost for Daz dashboard and use your temporary credentials to log into your private Iray Server running on the NVIDIA GPU you selected).
Step 2: Stop your Iray Server render queue prior to submitting your file for rendering. (Click on the orange Stop Queue button . You may choose to let any render jobs complete before pressing the Stop button).
Step 3: Submit your project for Rendering by clicking on the Render button in Daz Studio. (This assumes you have already connected your Daz Studio to your Boost for Daz Iray Server.) This will upload your file to Iray Server and when done, your project should appear in your Iray Server Admin queue under Jobs. Please note that your upload times will depend on the size of the render package (which is a function of your project complexity) and your internet upload bandwidth speeds).
Step 4: Edit the Job. Click on the edit icon below the Job name to edit the pixel type.
Step 5: Select RGB for the Bit Depth parameter (in the Buffers section). (Default is typically RGBA). Selecting RGB instead of RGBA will cause the alpha channel not to be generated or saved and so you will see the background.
Also note that even with the alpha channel generated the background is still there, however certain viewing tools (like Windows Picture Viewer) don't show it. However, if you open the file in Photoshop (or a similar tool) and choose Layer | Layer Mask | From Transparency and then go to your Channels panel and delete the Alpha channel that appears it will reveal that background.
Step 6: Click on the Save button to save this edit.
Step 7: Click on Start Queue to render this project .
Step 8: Download the completed rendered file. Once the render is completed, it will move to the Done queue. Click on the job and download the zip file to your local drive.
Additional resources on HDRI:
