Layer Mask issue - help Tweet

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Hello,
is there a way to get layer masks as separated BW masks ?
By now Layer maks is just a random color single layer in the EXR, and if i have many colors selection becomes unprecise.
I know that i can render separate Layers but this brings times up a lot, so getting the BW masks would be the best thing.
Cryptomatte can do it but it just works with Material pins, which means i have 200 masks in a EXR and this is highly unpratical as well.

thanks
Paolo