Issues with USD Export from Blender to Isaac Sim

Omniverse Isaac Sim
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1

Hi everyone,

I’ve recently exported a USD file from Blender and encountered a few issues:

  1. Rendering Differences: The rendered output in Blender looks significantly different from the output in Isaac Sim. The quality in Isaac Sim seems much worse, with many visual defects.
  2. Rendering Options: I’ve noticed that Isaac Sim offers several options such as RTX-Real-Time, RTX-Interactive, and various rendering modes and settings. How should I choose among these? I’ve tried a few, but none of them match the quality of Blender’s render; there are still many defects.
  3. Shader Incompatibility: There seems to be a discrepancy between MDL shaders in Isaac Sim and Blender shaders. When importing, they don’t correspond one-to-one. Is this a bug? How can I ensure that the materials remain consistent when importing USD files from Blender?

Any advice or solutions would be greatly appreciated!

Thanks!

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2

Moreover, the rendering results in Isaac Sim are very unstable. For example, after achieving a stable render with RTX-Interactive, if I switch to RTX-Real-Time and then back to RTX-Interactive, the results are different from the previous RTX-Interactive render. I feel like Isaac Sim has a lot of bugs!