I need to make a 2 bit mask

[Hilt]

Create the mask in your favorite compositing app.
Or render in layers with alpha turned on. Put all the needed objects in own layers and render it to your favorite compositing app.

Or did I get your question all wrong?

.hilt

[imashination]

Tell c4d to create a straight alpha in the render settings.

ps. black and white is 1-bit, not 2-bit

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