I posted this in Blender Bugs forum but the issue occurs in stand alone as well.
Problem occurs only when Alpha Channel is enabled. I don't know if this is a bug or expected behavior, but .exr files output from Blender's file exporter do not have the issue (one can enabled Alpha Channel and still get a normal AO pass in Octane Blender). The issue only occurs when outputting the .exr files using Octane's export implementation.
More info in my Octane Blender post:
viewtopic.php?f=114&t=74498
AO pass rendered yellow when Alpha Channel enabled
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NOTE: The software in this forum is not %100 reliable, they are development builds and are meant for testing by experienced octane users. If you are a new octane user, we recommend to use the current stable release from the 'Commercial Product News & Releases' forum.
NOTE: The software in this forum is not %100 reliable, they are development builds and are meant for testing by experienced octane users. If you are a new octane user, we recommend to use the current stable release from the 'Commercial Product News & Releases' forum.