Cryptomatte issue Tweet

[Lewis]

Soooo we need LOCK option to have fixed ID.

[jayroth2020]

Depending on the Octane version, these ID channels should be avoided (the others should work):

ObjectNode — The Cryptomatte channel is based on distinct Object nodes. This option cannot generate stable matte IDs.
MaterialNode — The Cryptomatte channel is based on distinct material nodes. This option cannot generate stable matte IDs.
ObjectPinName — The Cryptomatte channel is based on the names of the existing Object pins in the scene. This option cannot generate stable matte IDs.
Instance — The ID channel is based on instance IDs, derived from name spaces of hierarchical groups of objects. This option cannot generate stable matte IDs.

Make sure to test your results before committing to long sequences.