no.

nothing in catalyst is cmy.
its all rgb.
its all rgb because the output device is rgb.
it makes no sense at all in computer->projectors to talk about cmy.

but computer cmy is simply 1-r, or 1-g, or 1-b.
there is nothing complex about this.

what you saw with inverted colours was simply a little bug, i liked the result, so i left it in.

i added inverted colour modes that do this correctly yesterday.

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what you need to be very very wary about is talking about lighting cmy or printing cmyk or computer cmy in the same way- they are quite different.

operating in different image colour spaces is totally different from whats going on here internally in catalyst.