Hi there,
I had this issue the other day where a cryptomatte we rendered out was changing colors midway through the render. Give the EXRs in this file a look:
https://www.dropbox.com/sh/kry1ch9hxq58coq/AAC6OngGPXm66m2mTOiNBLM3a?dl=0
What causes that change around frame 40? (I mentioned in another post the gamma of a rendering changing mid render). If the colors change the cryptomatte becomes kinda useless. Similarly to my other post this would have been a single project with a single set of settings placed in the render queue. The render may have crashed a few times and had to be restarted. But we always would have just restarted the render via the Cinema 4D render queue without changing any settings. We are net-rendering between multiple machines so it's possible something's related to that? Running octane via Cinema 4d on Windows. This would have been with octane 2021.1.5.
Let me know your thoughts.
-Ryan