Generic forum to discuss Octane Render, post ideas and suggest improvements.
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Did you try without the placement node? Don't know why, but that's the only difference between your setup and scenes I have been able to render the animation out of.
The older Lua scripts didn't go as deep as the newer scripts do to find the render targets. You have set your scene up in the "old preview configuration", it might be better if you set it up on a regular scene.